Units
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 sometimes 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[1] | - | Current Max Possible: 20999839.77085749[2] |
| megaBitcoin | MBTC | 1,000,000 | - | - |
| kiloBitcoin | kBTC | 1,000 | - | - |
| Original Block Reward | - | 50 | block | Until block 210000 |
| Current Block Reward | - | 25 | block | As of Block 345747[3] |
| decaBitcoin | daBTC | 10 | - | - |
| Bitcoin | BTC | 1 | coin | one bitcoin |
| deciBitcoin | dBTC | 0.1 | - | one tenth of a Bitcoin |
| centiBitcoin | cBTC | 0.01 | bitcent | one hundredth 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[4] | - | 0.0000001 | Finney | 10 millionth, 1e-7 |
| Satoshi | - | 0.00000001 | none | 100 millionth, 1e-8, smallest possible unit |
For information about Tonal Bitcoin, including how to translate much of the above table into Tonal units, see its page here: Tonal Bitcoin (TBC).
References
- ↑ 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