btc_usd_rechner

Simple Bitcoin Converter

Exchange rate calculated using USD Bitcoin price.

This site allows you to:

• See the Bitcoin exchange rate i.e. the current value of one bitcoin.
• Convert any amount to or from your preferred currency.

Bitcoin is a digital currency. You can use Bitcoin to send money to anyone via the Internet with no middleman. Learn more here.

Keep an eye on the Bitcoin price, even while browsing in other tabs. Simply keep this site open and see the live Bitcoin price in the browser tab. (Note: Some mobile browsers don’t yet support this feature.)

See how many bitcoins you can buy. Enter an amount on the right-hand input field, to see the equivalent amount in Bitcoin on the left.

See the value of your Bitcoin holdings. Enter the number of bitcoins you have, and watch their value fluctuate over time.

Compare Bitcoin to gold and other precious metals by checking out the converters for Bitcoin to gold, Bitcoin to silver, Bitcoin to platinum, and Bitcoin to palladium.

Try it on your phone or tablet—this site is designed with mobile devices in mind.

Convert in terms of smaller units e.g. microbitcoins (µ), millibitcoins (m). Toggle using keyboard shortcuts: 'u', 'm', and 'k'.

Bookmark your preferred currency e.g. Bitcoin to Euro, or Bitcoin to British Pound. This site currently supports 64 currencies.

Price data is continually gathered from multiple markets. A weighted average price of these markets is shown by default (based on 24-hour trade volume). Alternatively, you can choose a specific source from the settings menu.

Development

• Linkable (i.e. bookmarkable, shareable) amounts.
• A widget to be embedded on other sites.

• Options added for millibitcoins, and 3 new cryptocurrencies. 2014-03-16
• Volume-weighted pricing implemented as the default option. 2013-11-29
• Multiple data source options included. Currency chooser improved. 08-16
• Major Android-related bugs fixed. (Thanks to those who donated!) 07-07

You’re welcome to contact the creator of this site at Reddit or BitcoinTalk. Bug reports are greatly appreciated.

Disclaimer

The exchange rates on this site are for information purposes only. They are not guaranteed to be accurate, and are subject to change without notice.

Bitcoin (BTC) and United States Dollar (USD) Currency Exchange Rate Conversion Calculator

This Bitcoin and United States Dollar convertor is up to date with exchange rates from May 29, 2018.

Enter the amount to be converted in the box to the left of Bitcoin. Use "Swap currencies" to make United States Dollar the default currency. Click on United States Dollars or Bitcoins to convert between that currency and all other currencies.

The Bitcoin is the currency in no countries. The United States Dollar is the currency in American Samoa (AS, ASM), British Virgin Islands (VG, VGB, BVI), El Salvador (SV, SLV), Guam (GU, GUM), Marshall Islands (MH, MHL), Micronesia (Federated States of Micronesia, FM, FSM), Northern Mariana Islands (MP, MNP), Palau (PW, PLW), Puerto Rico (PR, PRI), United States (United States of America, US, USA), Turks and Caicos Islands (TC, TCA), Virgin Islands (VI, VIR), Timor-Leste, Ecuador (EC, ECU), Johnston Island, Midway Islands, and Wake Island. The United States Dollar is also known as the American Dollar, and the US Dollar. The symbol for BTC can be written BTC. The symbol for USD can be written $. The United States Dollar is divided into 100 cents. The exchange rate for the Bitcoin was last updated on May 29, 2018 from coinmarketcap.com. The exchange rate for the United States Dollar was last updated on May 29, 2018 from The International Monetary Fund. The BTC conversion factor has 6 significant digits. The USD conversion factor has 6 significant digits.

Popular Conversions

Starting Currency

Leave a Comment

This currency calculator is provided in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Convert BTC, mBTC, Bits, Satoshis, USD, EUR, and More

This is the best Bitcoin converter for any Bitcoin conversion, like BTC to USD. Bitcoin units include BTC, mBTC, bits, and Satoshis. Fiat currencies include USD (US Dollars), CAD (Canadian Dollars), EUR (Euro), GBP (Great Britain Pounds), and AUD (Australian Dollars). Available altcoins are BCH (Bitcoin Cash), LTC (Litecoin), and ETH (Ethereum).

Convert!

Show Altcoins & More Currencies

Please let me know if you want me to add a feature or if you have any ideas for how I can improve this Bitcoin converter.

The Bitcoin Converter Began with BTC and mBTC

I noticed that several people found my original Bitcoin Converter when searching for a way to convert from mBTC to BTC and BTC to USD. While this is an extremely simple Bitcoin conversion, I figured I’d create this BTC converter just in case someone really wanted it. So, here it is, my BTC and mBTC (and now, bits and Satoshis and USD and EUR and GBP) converter. We use the CryptoCompare Price Index for every USD, CAD, EUR, and GBP conversion. Let me know if you have any questions or suggestions for improving the Bitcoin converter.

New Bitcoin Unit: Bits

We recently added support for any Bitcoin conversion to or from bits! Bits are one millionth of one Bitcoin or one thousandth of one mBTC. A bit is the same thing as a μBTC or a microbitcoin. Enjoy!

New Currency (9/2/14): USD

You can now convert to and from US dollars with the BTC converter (in addition to Bitcoin, mBTC, and bits). This is perfect for the conversion that everyone needs: BTC to USD. The exchange rate is from CryptoCompare. This Bitcoin converter just keeps getting better!

New Bitcoin Unit (10/1/14): Satoshi

We’ve added the Satoshi to the Bitcoin calculator. The Satoshi is currently the smallest unit of Bitcoin available. There are 100 million of them in one full Bitcoin. All other units (mBTC, bits, USD) are still available, so there are tons of Bitcoin conversion pairs to choose from. Satoshi to BTC? We’ve got that. Want to convert from the Satoshi to USD? You can! This Bitcoin converter is now extremely versatile.

New Currency (3/4/15): EUR

We recently added support for the Euro! Now you can use this calculator to do Bitcoin conversions like BTC to EUR and EUR to BTC. You could even convert something like EUR to USD and see what the rate looks like using Bitcoin as the base currency.

New Altcoins (2/7/16): ETH and LTC

The Bitcoin converter is now an altcoin converter as well! We’ve added support for some of the most popular alternative cryptocurrencies, Ethereum and Litecoin. You can find them by checking the box that says “Show Altcoins” and start converting instantly. If you want to convert from ETH to BTC, we’ve got your back. Or if you need a calculator for Ethereum to Bitcoin, we can do that too. Let us know what altcoin we should add next!

New Altcoin (8/7/2017): Bitcoin Cash

Now that Bitcoin officially forked, I added Bitcoin Cash (also known as Bcash, BCH, and BCC) to the list. For now, I’ll be a primary currency (meaning you don’t have to check the “Show Altcoins” box to see it). But if BCH crashes over time as many expect, I’ll move it into the altcoins area to reduce clutter.

So go ahead! Try out a BCH to BTC conversion and see how much extra value you may have lying around in your old Bitcoin wallets.

US Search Mobile Web

Welcome to the Yahoo Search forum! We’d love to hear your ideas on how to improve Yahoo Search.

The Yahoo product feedback forum now requires a valid Yahoo ID and password to participate.

You are now required to sign-in using your Yahoo email account in order to provide us with feedback and to submit votes and comments to existing ideas. If you do not have a Yahoo ID or the password to your Yahoo ID, please sign-up for a new account.

If you have a valid Yahoo ID and password, follow these steps if you would like to remove your posts, comments, votes, and/or profile from the Yahoo product feedback forum.

• Vote for an existing idea ( )
• or
• Post a new idea…

• Hot ideas
• Top ideas
• New ideas
• Category
• Status
• My feedback

Improve your services

Your search engine does not find any satisfactory results for searches. It is too weak. Also, the server of bing is often off

I created a yahoo/email account long ago but I lost access to it; can y'all delete all my yahoo/yahoo account except for my newest YaAccount

I want all my lost access yahoo account 'delete'; Requesting supporter for these old account deletion; 'except' my Newest yahoo account this Account don't delete! Because I don't want it interfering my online 'gamble' /games/business/data/ Activity , because the computer/security program might 'scure' my Information and detect theres other account; then secure online activities/ business securing from my suspicion because of my other account existing will make the security program be 'Suspicious' until I'm 'secure'; and if I'm gambling online 'Depositing' then I need those account 'delete' because the insecurity 'Suspicioun' will program the casino game 'Programs' securities' to be 'secure' then it'll be 'unfair' gaming and I'll lose because of the insecurity can be a 'Excuse'. Hope y'all understand my explanation!

I want all my lost access yahoo account 'delete'; Requesting supporter for these old account deletion; 'except' my Newest yahoo account this Account don't delete! Because I don't want it interfering my online 'gamble' /games/business/data/ Activity , because the computer/security program might 'scure' my Information and detect theres other account; then secure online activities/ business securing from my suspicion because of my other account existing will make the security program be 'Suspicious' until I'm 'secure'; and if I'm gambling online 'Depositing' then I need those account 'delete' because the insecurity 'Suspicioun' will program the casino game 'Programs' securities' to be… more

chithidio@Yahoo.com

i dont know what happened but i can not search anything.

Golf handicap tracker, why can't I get to it?

Why do I get redirected on pc and mobile device?

Rahyaftco@yahoo.com

RYAN RAHSAD BELL literally means

Question on a link

In the search for Anaïs Nin, one of the first few links shows a picture of a man. Why? Since Nin is a woman, I can’t figure out why. Can you show some reason for this? Who is he? If you click on the picture a group of pictures of Nin and no mention of that man. Is it an error?

Repair the Yahoo Search App.

Yahoo Search App from the Google Play Store on my Samsung Galaxy S8+ phone stopped working on May 18, 2018.

I went to the Yahoo Troubleshooting page but the article that said to do a certain 8 steps to fix the problem with Yahoo Services not working and how to fix the problem. Of course they didn't work.

I contacted Samsung thru their Samsung Tutor app on my phone. I gave their Technican access to my phone to see if there was a problem with my phone that stopped the Yahoo Search App from working. He went to Yahoo and I signed in so he could try to fix the Yahoo Search App not working. He also used another phone, installed the app from the Google Play Store to see if the app would do any kind of search thru the app. The Yahoo Search App just wasn't working.

I also had At&t try to help me because I have UVERSE for my internet service. My internet was working perfectly. Their Technical Support team member checked the Yahoo Search App and it wouldn't work for him either.

We can go to www.yahoo.com and search for any topic or website. It's just the Yahoo Search App that won't allow anyone to do web searches at all.

I let Google know that the Yahoo Search App installed from their Google Play Store had completely stopped working on May 18, 2018.

I told them that Yahoo has made sure that their Yahoo members can't contact them about anything.

I noticed that right after I accepted the agreement that said Oath had joined with Verizon I started having the problem with the Yahoo Search App.
No matter what I search for or website thru the Yahoo Search App it says the following after I searched for
www.att.com.

WEBPAGE NOT AVAILABLE
This webpage at gttp://r.search.yahoo.com/_ylt=A0geJGq8BbkrgALEMMITE5jylu=X3oDMTEzcTjdWsyBGNvbG8DYmyxBHBvcwMxBHZ0aWQDTkFQUEMwxzEEc2VjA3NylRo=10/Ru=https%3a%2f%2fwww.att.att.com%2f/Rk=2/Es=plkGNRAB61_XKqFjTEN7J8cXA-
could not be loaded because:
net::ERR_CLEARTEXT_NOT_PERMITTED

I tried to search for things like www.homedepot.com. The same thing happened. It would say WEBPAGE NOT AVAILABLE. The only thing that changed were all the upper and lower case letters, numbers and symbols.
Then it would again say
could not be loaded because:
net::ERR_CLEARTEXT_NOT_PERMITTED

This is the same thing that happened when Samsung and At&t tried to do any kind of searches thru the Yahoo Search App.

Yahoo needs to fix the problem with their app.

Yahoo Search App from the Google Play Store on my Samsung Galaxy S8+ phone stopped working on May 18, 2018.

I went to the Yahoo Troubleshooting page but the article that said to do a certain 8 steps to fix the problem with Yahoo Services not working and how to fix the problem. Of course they didn't work.

I contacted Samsung thru their Samsung Tutor app on my phone. I gave their Technican access to my phone to see if there was a problem with my phone that stopped the Yahoo Search App from working. He went to Yahoo and… more

BTC/USD - Bitcoin US Dollar

For all future releases Just for the upcoming release Send me a reminder 1 trading day before

Position added successfully to:

• Volume: 29,156
• Bid/Ask: 7,484.9 / 7,485.0
• Day's Range: 7,040.0 - 7,536.0

BTC/USD Bitfinex Streaming Chart

To hide/show event marks, right click anywhere on the chart, and select "Hide Marks On Bars".

• To use this feature, make sure you are signed-in to your account
• Make sure you are signed-in with the same user profile

For all future releases Just for the upcoming release Send me a reminder 1 trading day before

My Sentiments

We encourage you to use comments to engage with users, share your perspective and ask questions of authors and each other. However, in order to maintain the high level of discourse we’ve all come to value and expect, please keep the following criteria in mind:

• Enrich the conversation
• Stay focused and on track. Only post material that’s relevant to the topic being discussed.
• Be respectful. Even negative opinions can be framed positively and diplomatically.
• Use standard writing style. Include punctuation and upper and lower cases.
• NOTE : Spam and/or promotional messages and links within a comment will be removed
• Avoid profanity, slander or personal attacks directed at an author or another user.
• Don’t Monopolize the Conversation. We appreciate passion and conviction, but we also believe strongly in giving everyone a chance to air their thoughts. Therefore, in addition to civil interaction, we expect commenters to offer their opinions succinctly and thoughtfully, but not so repeatedly that others are annoyed or offended. If we receive complaints about individuals who take over a thread or forum, we reserve the right to ban them from the site, without recourse.
• Only English comments will be allowed.

Bitcoin Profitability Calculator – BTC Mining Profit Calculator

Enter your set up information in the form below. Do not enter commas, only dots for decimal separator.

Nothing guaranteed, of course this is only a rough estimate!
Do not enter commas, only dots for decimal separator. You can also calculate rented mining by setting “Power consumption” to 0 and “Cost of mining hardware” to the rent per time frame. Default values are for a system of four 6870s.

Estimate Strategy

Extrapolating bitcoin difficulty or price is pure voodoo. It is much easier to predict the relationship of the two parameters in form of the Mining Factor. The Mining Factor 100 is the value in USD of the bitcoins you can generate if you let a 100MHash/s miner run for 24 hours. If the Mining Factor 100 rises above $2 or so everybody buys mining equipment and thus increases difficulty. If it falls people will stop mining eventually. The estimate starts with the current Mining Factor and decreases it exponentially such that the decrease accounts for the factor decline per year. Please note that a profit/loss by holding the coins is not accounted for in this estimate.

Bitcoin Mining Calculator

Got your shiny new ASIC miner? Wondering when it will pay off? If you enter your hash rate below, this page will calculate your expected earnings in both Bitcoins and dollars over various time periods (day, week, and month). It will not attempt to extrapolate difficulty or price changes -- it provides only instantaneous calculations (how much you'd make if all conditions remained as they were right now).

Next difficulty retarget occurs at block 526175.0 (eta 8.1 days): 4.31865889781e+12 / +0.3% [est.]

Has this service helped you? BTC 1MW6BNqwU4StysayHwApDZPBggms25tf5t

CoinBought: Buy anything on Amazon for BTC, ETC, XMR, or more. Orders placed automatically in minutes.

US Search Mobile Web

Welcome to the Yahoo Search forum! We’d love to hear your ideas on how to improve Yahoo Search.

The Yahoo product feedback forum now requires a valid Yahoo ID and password to participate.

You are now required to sign-in using your Yahoo email account in order to provide us with feedback and to submit votes and comments to existing ideas. If you do not have a Yahoo ID or the password to your Yahoo ID, please sign-up for a new account.

If you have a valid Yahoo ID and password, follow these steps if you would like to remove your posts, comments, votes, and/or profile from the Yahoo product feedback forum.

• Vote for an existing idea ( )
• or
• Post a new idea…

• Hot ideas
• Top ideas
• New ideas
• Category
• Status
• My feedback

Improve your services

Your search engine does not find any satisfactory results for searches. It is too weak. Also, the server of bing is often off

I created a yahoo/email account long ago but I lost access to it; can y'all delete all my yahoo/yahoo account except for my newest YaAccount

I want all my lost access yahoo account 'delete'; Requesting supporter for these old account deletion; 'except' my Newest yahoo account this Account don't delete! Because I don't want it interfering my online 'gamble' /games/business/data/ Activity , because the computer/security program might 'scure' my Information and detect theres other account; then secure online activities/ business securing from my suspicion because of my other account existing will make the security program be 'Suspicious' until I'm 'secure'; and if I'm gambling online 'Depositing' then I need those account 'delete' because the insecurity 'Suspicioun' will program the casino game 'Programs' securities' to be 'secure' then it'll be 'unfair' gaming and I'll lose because of the insecurity can be a 'Excuse'. Hope y'all understand my explanation!

I want all my lost access yahoo account 'delete'; Requesting supporter for these old account deletion; 'except' my Newest yahoo account this Account don't delete! Because I don't want it interfering my online 'gamble' /games/business/data/ Activity , because the computer/security program might 'scure' my Information and detect theres other account; then secure online activities/ business securing from my suspicion because of my other account existing will make the security program be 'Suspicious' until I'm 'secure'; and if I'm gambling online 'Depositing' then I need those account 'delete' because the insecurity 'Suspicioun' will program the casino game 'Programs' securities' to be… more

chithidio@Yahoo.com

i dont know what happened but i can not search anything.

Golf handicap tracker, why can't I get to it?

Why do I get redirected on pc and mobile device?

Rahyaftco@yahoo.com

RYAN RAHSAD BELL literally means

Question on a link

In the search for Anaïs Nin, one of the first few links shows a picture of a man. Why? Since Nin is a woman, I can’t figure out why. Can you show some reason for this? Who is he? If you click on the picture a group of pictures of Nin and no mention of that man. Is it an error?

Repair the Yahoo Search App.

Yahoo Search App from the Google Play Store on my Samsung Galaxy S8+ phone stopped working on May 18, 2018.

I went to the Yahoo Troubleshooting page but the article that said to do a certain 8 steps to fix the problem with Yahoo Services not working and how to fix the problem. Of course they didn't work.

I contacted Samsung thru their Samsung Tutor app on my phone. I gave their Technican access to my phone to see if there was a problem with my phone that stopped the Yahoo Search App from working. He went to Yahoo and I signed in so he could try to fix the Yahoo Search App not working. He also used another phone, installed the app from the Google Play Store to see if the app would do any kind of search thru the app. The Yahoo Search App just wasn't working.

I also had At&t try to help me because I have UVERSE for my internet service. My internet was working perfectly. Their Technical Support team member checked the Yahoo Search App and it wouldn't work for him either.

We can go to www.yahoo.com and search for any topic or website. It's just the Yahoo Search App that won't allow anyone to do web searches at all.

I let Google know that the Yahoo Search App installed from their Google Play Store had completely stopped working on May 18, 2018.

I told them that Yahoo has made sure that their Yahoo members can't contact them about anything.

I noticed that right after I accepted the agreement that said Oath had joined with Verizon I started having the problem with the Yahoo Search App.
No matter what I search for or website thru the Yahoo Search App it says the following after I searched for
www.att.com.

WEBPAGE NOT AVAILABLE
This webpage at gttp://r.search.yahoo.com/_ylt=A0geJGq8BbkrgALEMMITE5jylu=X3oDMTEzcTjdWsyBGNvbG8DYmyxBHBvcwMxBHZ0aWQDTkFQUEMwxzEEc2VjA3NylRo=10/Ru=https%3a%2f%2fwww.att.att.com%2f/Rk=2/Es=plkGNRAB61_XKqFjTEN7J8cXA-
could not be loaded because:
net::ERR_CLEARTEXT_NOT_PERMITTED

I tried to search for things like www.homedepot.com. The same thing happened. It would say WEBPAGE NOT AVAILABLE. The only thing that changed were all the upper and lower case letters, numbers and symbols.
Then it would again say
could not be loaded because:
net::ERR_CLEARTEXT_NOT_PERMITTED

This is the same thing that happened when Samsung and At&t tried to do any kind of searches thru the Yahoo Search App.

Yahoo needs to fix the problem with their app.

Yahoo Search App from the Google Play Store on my Samsung Galaxy S8+ phone stopped working on May 18, 2018.

I went to the Yahoo Troubleshooting page but the article that said to do a certain 8 steps to fix the problem with Yahoo Services not working and how to fix the problem. Of course they didn't work.

I contacted Samsung thru their Samsung Tutor app on my phone. I gave their Technican access to my phone to see if there was a problem with my phone that stopped the Yahoo Search App from working. He went to Yahoo and… more

Satoshi to Bitcoin

What is a Satoshi?

Each bitcoin (BTC) is divisible to the 8th decimal place, so each BTC can be split into 100,000,000 units. Each unit of bitcoin, or 0.00000001 bitcoin, is called a satoshi. A Satoshi is the smallest unit of Bitcoin.

How many Satoshis are in a Bitcoin?

There are 100,000,000 satoshi in a BTC.

What is this site?

Satoshi to Bitcoin is a Bitcoin converter/calculator. Right now, we offer two converters: Satoshi to BTC and BTC to Satoshi.

Bitcoin Kurs star

> JETZT Kryptowährungen kaufen

Bitcoin uses peer-to-peer technology to operate with no central authority or banks; managing transactions and the issuing of bitcoins is carried out collectively by the network. Although other cryptocurrencies have come before, Bitcoin is the first decentralized cryptocurrency - Its reputation has spawned copies and evolution in the space.

With the largest variety of markets and the biggest value - having reached a peak of 18 billion USD - Bitcoin is here to stay. As with any new invention, there can be improvements or flaws in the initial model however the community and a team of dedicated developers are pushing to overcome any obstacle they come across. It is also the most traded cryptocurrency and one of the main entry points for all the other cryptocurrencies. The price is as unstable as always and it can go up or down by 10%-20% in a single day.

Bitcoin is an SHA-256 POW coin with 21,000,000 total minable coins. The block time is 10 minutes. See below for a full range of Bitcoin markets where you can trade US Dollars for Bitcoin, crypto to Bitcoin and many other fiat currencies too.

Learn about the history of Bitcoin here and check out 50 crazy-fun facts about Bitcoin here!

Mobile payments made easy Bitcoin on mobiles allows you to pay with a simple two step scan-and-pay. No need to sign up, swipe your card, type a PIN, or sign anything. All you need to receive Bitcoin payments is to display the QR code in your Bitcoin wallet app and let your friend scan your mobile, or touch the two phones together (using NFC radio technology).

Security and control over your money Bitcoin transactions are secured by military grade cryptography. Nobody can charge you money or make a payment on your behalf. So long as you take the required steps to protect your wallet, Bitcoin can give you control over your money and a strong level of protection against many types of fraud.

Works everywhere, anytime Just like with email, you don't need to ask your family to use the same software or the same service providers. Just let them stick to their own favorites. No problem there; they are all compatible as they use the same open technology. The Bitcoin network never sleeps, even on holidays!

Fast international payments Sending bitcoins across borders is as easy as sending them across the street. There are no banks to make you wait three business days, no extra fees for making an international transfer, and no special limitations on the minimum or maximum amount you can send.

Choose your own fees There is no fee to receive bitcoins, and many wallets let you control how large a fee to pay when spending. Most wallets have reasonable default fees, and higher fees can encourage faster confirmation of your transactions. Fees are unrelated to the amount transferred, so it's possible to send 100,000 bitcoins for the same fee it costs to send 1 bitcoin.

Protect your identity With Bitcoin, there is no credit card number that some malicious actor can collect in order to impersonate you. In fact, it is even possible to send a payment without revealing your identity, almost just like with physical money. You should however take note that some effort can be required to protect your privacy.

Balances - block chain The block chain is a shared public ledger on which the entire Bitcoin network relies. All confirmed transactions are included in the block chain. This way, Bitcoin wallets can calculate their spendable balance and new transactions can be verified to be spending bitcoins that are actually owned by the spender. The integrity and the chronological order of the block chain are enforced with cryptography.

Transactions - private keys A transaction is a transfer of value between Bitcoin wallets that gets included in the block chain. Bitcoin wallets keep a secret piece of data called a private key or seed, which is used to sign transactions, providing a mathematical proof that they have come from the owner of the wallet. The signature also prevents the transaction from being altered by anybody once it has been issued. All transactions are broadcast between users and usually begin to be confirmed by the network in the following 10 minutes, through a process called mining.

Processing - mining Mining is a distributed consensus system that is used to confirm waiting transactions by including them in the block chain. It enforces a chronological order in the block chain, protects the neutrality of the network, and allows different computers to agree on the state of the system. To be confirmed, transactions must be packed in a block that fits very strict cryptographic rules that will be verified by the network. These rules prevent previous blocks from being modified because doing so would invalidate all following blocks. Mining also creates the equivalent of a competitive lottery that prevents any individual from easily adding new blocks consecutively in the block chain. This way, no individuals can control what is included in the block chain or replace parts of the block chain to roll back their own spends.