Units: Difference between revisions

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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.
Most commonly, units of bitcoin are expressed in decimal exponents such as BTC ("bitcoins"), mBTC ("millibitcoins") and μBTC ("[[bit (unit)|micro-bitcoin]] or [[bit (unit)|bit]]  ").


{| class="wikitable sortable"
==Decimal metric units==
 
The BTC unit was chosen to represent a value of 10<sup>8</sup> so as to give sub-unit precision rather than large whole numbers.
Mirroring the standard ''Le Système International d'Unités'', this allows for divisions of 1/10th (deci-bitcoins, dBTC), 1/100th (centi-bitcoins, cBTC), 1/1 000th (milli-bitcoins, mBTC), and 1/1 000 000 (micro-bitcoins, μBTC).
 
===Bits===
 
Many have adopted the practice of referring to the micro-bitcoin metric sub-unit as "bits".
<!-- FIXME: stub -->
 
==Table of all units==
 
This table is intended to include all well-defined units of bitcoin value, including less common and niche units.
 
{| class="wikitable sortable" style="text-align:right;font-family:Console, fixed, monospace"
|-
|-
! Unit !! Abbreviation !! Decimal (BTC) !! Alternate names !! Info
! Unit !! Abbreviation !! Decimal (BTC) !! Alternate names !! Info
|-
|-
| Algorithmic Max || - || 20,999,999.9769<ref>[http://www.wolframalpha.com/input/?i=%28sum%28210000*floor%285000000000%2F2^i%29%29%2C+i%3D0+to+32%29%2F10000000 Wolfram Alpha Calculation]</ref> || - || Current Max Possible: 20999839.77085749<ref>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.</ref>
| Algorithmic maximum || || 20,999,999.9769&nbsp;&nbsp;&nbsp;&nbsp; || || [http://www.wolframalpha.com/input/?i=%28sum%28210000*floor%285000000000%2F2^i%29%29%2C+i%3D0+to+32%29%2F10000000 Calculation]
|-
|- style="background-color:#ddffdd"
| megaBitcoin || MBTC || 1,000,000 || - || Rarely used in context
| tam-bitcoin || || 2,814,749.76710656 || || 1,0000,0000 tonal
|-
|- style="background-color:#ddddff"
| kiloBitcoin || kBTC || 1,000 || - || Rarely used in context
| mega-bitcoin || MBTC || 1,000,000&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || || Rare in context
|-
|- style="background-color:#ddddff"
| Original Block Reward || - || 50 || block || Until [[Halving day 2012|block 210000]]
| kilo-bitcoin || kBTC || 1,000&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || || Rare in context
|-
|- style="background-color:#ddddff"
| Current Block Reward || - || 25 || block || As of [[Halving day 2012|block 210000]]
| hecto-bitcoin || hBTC || 100&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || || Rare
|-
| decaBitcoin || daBTC || 10 || - || Rarely used in context
|-
| Bitcoin || BTC || 1 || coin || Base unit (100 million [[satoshi (unit)|satoshis]])
|-
| deciBitcoin || dBTC || 0.1 || - || Rarely used in context
|-
|-
| centiBitcoin || cBTC || 0.01 || bitcent || Frequently used until the [[November 2013 bubble]]
| Initial block subsidy || || 50&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || || Until [[Halving day 2012|block 210000]]<ref>{{cite block|209999|year=2012|month=11|day=28|hash=00000000000000f3819164645360294b5dee7f2e846001ac9f41a70b7a9a3de1}}</ref>
|- style="background-color:#ddffdd"
| bong-bitcoin || ᵇTBC || 42.94967296 || || 1,0000 tonal
|-
|-
| [[millibit|milliBitcoin]] || mBTC || 0.001 || millibit, millicoin, millie || Thousandth of a Bitcoin, frequently used subdivision
| Current block subsidy || || 6.25&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || block || As of halving day 2020, block 630000
|- style="background-color:#ddddff"
| deca-bitcoin || daBTC || 10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || || Rare
|- style="background-color:#ddffdd"
| mill-bitcoin || ᵐTBC || 2.68435456 || || 1000 tonal
|- style="background-color:#ddddff"
| bitcoin || BTC || 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || coin || SI base unit
|- style="background-color:#ddffdd"
| san-bitcoin || ˢTBC || 0.16777216 || || 100 tonal
|- style="background-color:#ddddff"
| [[deci-bitcoin|deci-bitcoin]] || dBTC || 0.1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || || Rare
|- style="background-color:#ddffdd"
| ton-bitcoin || ᵗTBC || 0.01048576 || || 10 tonal
|- style="background-color:#ddddff"
| centi-bitcoin || cBTC || 0.01&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || bitcent || Formerly frequent<ref>Bitcents were frequent until the November 2013 bubble</ref>
|- style="background-color:#ddddff"
| [[millibit|milli-bitcoin]] || mBTC || 0.001&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; || [[millibit]], millie || Occasional
|- style="background-color:#ddffdd"
| bitcoin || TBC || 0.00065536 || || Tonal base unit
|- style="background-color:#ddffdd"
| bitcoin-ton || TBCᵗ || 0.00004096 || || 0.1 tonal
|- style="background-color:#ddffdd"
| bitcoin-san || TBCˢ || 0.00000256 || || 0.01 tonal
|- style="background-color:#ddddff"
| [[bit (unit)|micro-bitcoin]] || μBTC || 0.000001&nbsp;&nbsp; || [[bit (unit)|bit]] || Frequent
|- style="background-color:#ddffdd"
| bitcoin-mill || TBCᵐ || 0.00000016 || || 0.001 tonal
|-
|-
| [[bit (unit)|microBitcoin]] || μBTC || 0.000001 || bit || Millionth of a Bitcoin, frequently used subdivision
| || || 0.0000001&nbsp; || finney<ref>[http://www.reddit.com/r/Bitcoin/comments/2ewp3z/i_propose_we_rename_00000001_btc_as_the_finney/ After Hal Finney, Bitcoin Pioneer]</ref> ||
|- style="background-color:#ddffdd"
| bitcoin-bong || TBCᵇ || 0.00000001 || || 0.0001 tonal
|-
|-
| Finney<ref>[http://www.reddit.com/r/Bitcoin/comments/2ewp3z/i_propose_we_rename_00000001_btc_as_the_finney/ After Hal Finney, Bitcoin Pioneer]</ref> || - || 0.0000001 || Finney || 10 millionth, 1e-7
| || sat || 0.00000001 || [[Satoshi (unit)|satoshi]] || Blockchain value
|-
|-
| [[Satoshi (unit)|satoshi]] || - || 0.00000001 || ''none'' || 100 millionth, 1e-8, smallest possible unit
| || msat || 0.00000000001 || millisatoshi<ref>[https://github.com/ElementsProject/lightning/blob/master/README.md#receiving-and-receiving-payments Receiving and receiving payments]</ref> || [[Lightning Network|Payment channel value]]
|}
|}


Latest revision as of 22:09, 4 May 2022

Most commonly, units of bitcoin are expressed in decimal exponents such as BTC ("bitcoins"), mBTC ("millibitcoins") and μBTC ("micro-bitcoin or bit ").

Decimal metric units

The BTC unit was chosen to represent a value of 108 so as to give sub-unit precision rather than large whole numbers. Mirroring the standard Le Système International d'Unités, this allows for divisions of 1/10th (deci-bitcoins, dBTC), 1/100th (centi-bitcoins, cBTC), 1/1 000th (milli-bitcoins, mBTC), and 1/1 000 000 (micro-bitcoins, μBTC).

Bits

Many have adopted the practice of referring to the micro-bitcoin metric sub-unit as "bits".

Table of all units

This table is intended to include all well-defined units of bitcoin value, including less common and niche units.

Unit Abbreviation Decimal (BTC) Alternate names Info
Algorithmic maximum 20,999,999.9769     Calculation
tam-bitcoin 2,814,749.76710656 1,0000,0000 tonal
mega-bitcoin MBTC 1,000,000          Rare in context
kilo-bitcoin kBTC 1,000          Rare in context
hecto-bitcoin hBTC 100          Rare
Initial block subsidy 50          Until block 210000[1]
bong-bitcoin ᵇTBC 42.94967296 1,0000 tonal
Current block subsidy 6.25        block As of halving day 2020, block 630000
deca-bitcoin daBTC 10          Rare
mill-bitcoin ᵐTBC 2.68435456 1000 tonal
bitcoin BTC 1          coin SI base unit
san-bitcoin ˢTBC 0.16777216 100 tonal
deci-bitcoin dBTC 0.1        Rare
ton-bitcoin ᵗTBC 0.01048576 10 tonal
centi-bitcoin cBTC 0.01       bitcent Formerly frequent[2]
milli-bitcoin mBTC 0.001      millibit, millie Occasional
bitcoin TBC 0.00065536 Tonal base unit
bitcoin-ton TBCᵗ 0.00004096 0.1 tonal
bitcoin-san TBCˢ 0.00000256 0.01 tonal
micro-bitcoin μBTC 0.000001   bit Frequent
bitcoin-mill TBCᵐ 0.00000016 0.001 tonal
0.0000001  finney[3]
bitcoin-bong TBCᵇ 0.00000001 0.0001 tonal
sat 0.00000001 satoshi Blockchain value
msat 0.00000000001 millisatoshi[4] Payment channel value

See also

References

  1. ↑ Block 209999. Main chain. 2012-11-28. Hash 00000000000000f3819164645360294b5dee7f2e846001ac9f41a70b7a9a3de1. Block explorer
  2. ↑ Bitcents were frequent until the November 2013 bubble
  3. ↑ After Hal Finney, Bitcoin Pioneer
  4. ↑ Receiving and receiving payments
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