Take the 2-minute tour ×
Bitcoin Stack Exchange is a question and answer site for Bitcoin crypto-currency enthusiasts. It's 100% free, no registration required.

I am aware that Satoshi Nakamoto is the author of the paper that originated Bitcoin and the creator of the original bitcoin client. However, I often hear the term Satoshi as if it was a monetary unit.

What is a Satoshi?

share|improve this question

4 Answers 4

up vote 54 down vote accepted

A Satoshi is the smallest fraction of a Bitcoin that can currently be sent: 0.00000001 BTC, that is, a hundredth of a millionth BTC. In the future, however, the protocol may be updated to allow further subdivisions, should they be needed.

Further examples of units

  • 1 BTC = 1,000 mBTC (millibitcoin)
  • 1 BTC = 1,000,000 μBTC (microbitcoin)
  • 1 BTC = 100,000,000 Satoshis
  • 1 mBTC = 100,000 Satoshis
  • 1 μBTC (microbitcoin) = 100 Satoshis
share|improve this answer
Note that it's possible that future protocol versions will introduce amounts smaller than a Satoshi, if deemed required by the community. I'm not sure how likely this is. bitcoin.stackexchange.com/questions/122/… –  ripper234 Aug 30 '11 at 23:02
@eMansipater It might be worth editing your answer just a touch to ensure that people don't think that there is a limit to the number of decimal places possible. –  Gary Rowe Sep 9 '11 at 10:35
It's Michael's answer, but I updated it anyway. –  eMansipater Sep 10 '11 at 12:08
Isn't one BTC a HUNDRED million Satoshis? –  Blaisorblade May 11 at 23:51

1 mBTC = 0.001 BTC

1 mBTC = 100,000 Satoshis

1 uBTC = 0.000001 BTC

1 μBTC = 100 Satoshis

1 Satoshi = 0.00000001 BTC

100 Satoshis = 0.000001 BTC

1,000 Satoshis = 0.00001 BTC

10,000 Satoshis = 0.0001 BTC

1 BTC = 100,000,000 Satoshis

1 BTC = 100,000 μBTC

1 BTC = 1000 mBTC

share|improve this answer

A Satoshi is a one hundred millionth of a Bitcion.

Bitcoins are delimited to eight decimal places so even if (when?) Bitcoins are worth $1,000,000 each, you can still do penny transactions.

share|improve this answer
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post - you can always comment on your own posts, and once you have sufficient reputation you will be able to comment on any post. –  Lohoris Mar 12 '13 at 12:19
@Lohoris Just for my sake, can you clarify why this isn't an answer? It's not as comprehensive as the other answer, but it's definition does seem to match the definition of a Satoshi provided by the other answer, at least numerically (since the smallest unit could change in the future). –  user3930 Jul 21 '13 at 15:42
@JohnBensin it doesn't add anything to the accepted answer, and it has been posted much later. Also, it includes a pointless "if (when?) Bitcoins are worth $1,000,000 each". –  Lohoris Jul 21 '13 at 15:54
@Lohoris I agree. I downvoted because I felt that it didn't add anything to the question. The speculation may have just been an extreme/hypothetical example, but I agree that it doesn't add any new information. –  user3930 Jul 21 '13 at 16:25

A Satoshi is 0.00000001 BTC and currently the smallest transaction unit.

If a Satoshi was equivalent to one penny, a microBTC would be equivalent to one dollar, and one BTC would be equivalent to 1,000,000 dollars.

With one BTC on the order of $1,000 USD, a Satoshi is equivalent to .001 penny

share|improve this answer
-1 No new information in comparison to the previous answers. –  Murch Jan 22 at 13:36

protected by Community Jun 1 at 11:08

Thank you for your interest in this question. Because it has attracted low-quality answers, posting an answer now requires 10 reputation on this site.

Would you like to answer one of these unanswered questions instead?

Not the answer you're looking for? Browse other questions tagged or ask your own question.