While units in Bitcoin usually follow the Standard Metric Notation system, this page lists the most commonly-used units. These can be expressed in any number of ways, from using some form of the prefix to an abbreviation of both the prefix and adding Bitcoin. Bitcoin as a unit of account is commonly written without capitalization, but since it is not a genericized term yet and refers to one specific type of crypto-currency, capitalization is left as an exercise for the reader.
|Unit||Abbreviation||Decimal (BTC)||Alternate names||Info|
|Algorithmic Max||-||20,999,999.9769||-||Current Max Possible: 20999839.77085749|
|Original Block Reward||-||50||-||Until block 210000|
|Current Block Reward||-||25||-||As of Block 345747|
|deciBitcoin||dBTC||0.1||-||one tenth of a Bitcoin|
|milliBitcoin||mBTC||0.001||millibit, millicoin, and millie||thousandth of a Bitcoin|
|microBitcoin||μBTC||0.000001||bit||millionth of a Bitcoin|
|Finney||-||0.0000001||Finney||10 millionth, 1e-7|
|Satoshi||-||0.00000001||none||100 millionth, 1e-8, smallest possible unit|
For more information about Tonal Bitcoin, see its page, here: Tonal Bitcoin (TBC).
- Wolfram Alpha Calculation
- Current actually possible must take into account duplicate coinbases, destroyed fees, and provably destroyed coin outputs including the unspendable Genesis block. Some of this can be derived from 'bitcoin-cli gettxoutsetinfo' and subtracting that value from the then-current theoretically-possible maximum. As of this writing, it is 160.20604251 of unspendable BTC.
- Next halving will occur at Block 420000.
- After Hal Finney, Bitcoin Pioneer