How much is that in satoshi, in BTC, without counting zeros
Bitcoin has its own cents, and a lot of them: 100 million per *"dollar"*. A price of 0.00021 BTC looks strange until you say *"21 thousand satoshi"*. Same with 0.005 BTC = 5 mBTC = 500 thousand satoshi.
Type a number in any unit, the other three update instantly. No API calls, no waiting, nothing leaves your browser.
Bonus: type a BTC/USD rate manually and see how much it is in dollars. We don't pull live rates, they would be stale anyway, and you probably want the rate from your exchange.
How to use it
- Type a number into any field (satoshi, bit, mBTC, or BTC). The other three update automatically.
- Click a quick scenario (e.g. *"1000 satoshi"*) to instantly see what kind of amounts we are talking about.
- The BTC/USD rate field: type the current rate from the exchange you use (Coinbase, Kraken, Binance).
- Below the unit cards you see the raw satoshi value, handy when you are programming a wallet or pasting into a script.
- All math runs locally in your browser (BigInt, precision down to 1 satoshi). Nothing is sent to a server.
When this is useful
Seven typical situations where this converter gives you a concrete answer:
- Checking if 0.005 BTC is a lot or a little. You type it, see 5 mBTC or 500,000 satoshi, and after entering a rate: exactly how many dollars that is. No counting zeros in your head.
- Sending on Lightning Network. Sites quote prices in satoshi (e.g. 2,100 sat for an article, 21 sat for a tip). You type it, see that it is pennies. Decision makes itself.
- Programming a wallet or script. Bitcoin libraries (bitcoinjs-lib, btc-lib, NBitcoin) work exclusively in satoshi (BigInt). The converter gives you a raw value ready to paste.
- Explaining to a friend why they don't need to buy *"a whole Bitcoin"*. Show them that $20 is a few thousand satoshi. You can buy a single cent's worth.
- **Reading a tweet *"fee was 3 sat/vB"*** and unsure if that's a lot. Type a typical transaction size (250 bytes × 3 sat = 750 sat) and see that it's a fraction of a cent.
- Calculating a Lightning purchase. Coffee costs $4, BTC is at $70,000. The converter shows ~5,714 satoshi, you know your wallet has plenty.
- Comparing offers. One seller quotes 0.025 BTC, another 2,500,000 sat. Exactly the same amount, looks different. Converter clears it up in 2 seconds.
Questions and answers
A satoshi is the smallest unit of Bitcoin, like a cent for the dollar, except there are 100 million satoshi in 1 BTC (not 100, like cents in a dollar). So 1 sat = 0.00000001 BTC. The name comes from Satoshi Nakamoto, the pseudonym of Bitcoin's creator, whose real identity is still unknown.