Satoshi converter
A satoshi is the smallest unit of bitcoin recorded on the blockchain. Convert any amount between BTC, satoshis and dollars, with the arithmetic shown.
Photo: “New Ten Rupee coin” by Hafiz Issadeen, CC BY 2.0, via Flickr (edited: cropped and resized).
One bitcoin equals 100,000,000 satoshis, so one satoshi is 0.00000001 BTC [1]. To convert BTC to sats, multiply by 100,000,000. To convert dollars to sats, divide by the BTC price and multiply by 100,000,000.
Key points
- 11 BTC = 100,000,000 satoshis; the number is fixed in Bitcoin’s code.
- 2BTC → sats: multiply by 100,000,000. Sats → BTC: divide by 100,000,000.
- 3Dollar conversions need a BTC price, which changes constantly; the calculator uses whatever price you enter.
- 4Results are rounded to whole satoshis, because a satoshi is the smallest amount the blockchain records.
Satoshis
- In BTC
- —
- In dollars
- —
Runs entirely in your browser. Nothing you type is sent anywhere. Results are arithmetic, not advice — read the risk disclosure.
What formula does this converter use?#
sats = BTC × 100,000,000 · BTC = sats ÷ 100,000,000 · sats = dollars ÷ BTC price × 100,000,000Choose the unit of the amount you type. The converter turns it into satoshis, rounds to a whole satoshi, then shows the same amount in BTC and — if you entered a price — in dollars.
The factor of 100,000,000 is not a convention someone chose for a website. In Bitcoin Core, the reference software, the constant COIN is defined as the number of satoshis in one BTC: 100,000,000 [1]. All amounts on the blockchain are stored in satoshis and only converted to BTC for display [2].
How many satoshis are in common BTC amounts?#
| BTC | Satoshis | Often written as |
|---|---|---|
| 1 | 100,000,000 | 1 BTC |
| 0.1 | 10,000,000 | 10M sats |
| 0.01 | 1,000,000 | 1M sats |
| 0.001 | 100,000 | 100k sats |
| 0.00001 | 1,000 | 1k sats |
| 0.00000001 | 1 | 1 sat |
How do I convert dollars to satoshis?#
| Step | Value |
|---|---|
| 0.001 BTC in sats = 0.001 × 100,000,000 | 100,000 sats |
| 0.001 BTC in dollars = 0.001 × $50,000 | $50.00 |
| $10 in sats = $10 ÷ $50,000 × 100,000,000 | 20,000 sats |
| $1 in sats = $1 ÷ $50,000 × 100,000,000 | 2,000 sats |
| Value of 1 sat = $50,000 ÷ 100,000,000 | $0.0005 |
Because the result is rounded to a whole satoshi, very small dollar amounts can round to zero: $0.0001 at this price is 0.2 of a satoshi, shown as 0.
Where does the name “satoshi” come from?#
The unit is named in homage to Bitcoin’s pseudonymous creator, Satoshi Nakamoto, who set the value of one bitcoin at 100 million base units no later than November 2008. It is often shortened to “sat”; “satoshi” and “satoshis” are both used as the plural [2]. Two related units exist: a proposal called BIP-176 suggested “bits” for 100 satoshis, and payment channels such as the Lightning Network sometimes count in millisatoshis, one thousandth of a satoshi [2].
For the full definition, see the glossary entry for satoshi. To see why total supply ends just under 21 million BTC — about 2.1 quadrillion satoshis — read Bitcoin halving explained.
Frequently asked questions#
Can I buy less than one satoshi?
Not on the Bitcoin blockchain, where a satoshi is the smallest recorded amount. Some payment channels track millisatoshis internally, but on-chain balances are whole satoshis.
Why does the dollar result change from day to day?
Because the BTC price changes. The converter only uses the price you type in; it does not fetch prices.
Is a satoshi the same as a “bit”?
No. A bit, as proposed in BIP-176, is 100 satoshis, or one millionth of a bitcoin.
Does the converter store what I type?
No. It runs in your browser and sends nothing to us.
The bottom line#
Satoshis make small bitcoin amounts readable: 100,000 sats is easier to talk about than 0.001 BTC. The conversion to BTC is fixed by Bitcoin’s code; the conversion to dollars is only as good as the price you enter.
Sources#
Grade A = primary source (regulator, protocol specification, client code, original author). Grade B = expert secondary source used for explanation only.
- ABitcoin Core (GitHub). src/consensus/amount.h (COIN, MAX_MONEY), 2026.
- BBitcoin Wiki. Satoshi (unit), 2026.