Why Bitcoin has so many units
Bitcoin was designed with 8 decimal places, meaning one Bitcoin can be divided into 100 million pieces. As Bitcoin’s price has grown, different sub-units have emerged to make everyday amounts more readable.
Saying a coffee costs “0.0000519 BTC” is awkward. Saying it costs “5,190 sats” is much more natural. Different contexts use different units depending on what makes the amounts most readable.
The complete unit table
| Unit | Abbreviation | Value in BTC | Value in Satoshis |
|---|---|---|---|
| Bitcoin | BTC | 1 | 100,000,000 |
| Millibitcoin | mBTC | 0.001 | 100,000 |
| Microbitcoin | μBTC or bits | 0.000001 | 100 |
| Satoshi | sat | 0.00000001 | 1 |
Each unit is exactly 1,000 times smaller than the one above it — except the final step from microbitcoin to satoshi, which is 100 times smaller.
Bitcoin (BTC)
The base unit. Used for large transactions, investment amounts, and price quotations. When someone says “Bitcoin is at $96,000”, they mean one BTC costs $96,000.
Most people will never own a full Bitcoin. At current prices, 1 BTC is equivalent to a luxury car. This is why sub-units matter for everyday use.
When you see it: Exchange prices, large transfers, investment portfolios.
Millibitcoin (mBTC)
One thousandth of a Bitcoin. At $96,000 per BTC, one mBTC is worth about $96.
When you see it: Some older Bitcoin wallets and services use mBTC as their default display unit. Less common today.
Microbitcoin / Bits (μBTC)
One millionth of a Bitcoin, also called a “bit.” At $96,000 per BTC, one bit is worth about $0.096 — roughly ten cents.
When you see it: Some apps and services have used bits as a display unit for retail-sized amounts. Less common than satoshis today.
Satoshi (sat)
The smallest unit — one hundred millionth of a Bitcoin. Named after Bitcoin’s pseudonymous creator Satoshi Nakamoto.
At $96,000 per BTC, one satoshi is worth about $0.00096 — less than one tenth of a cent.
When you see it: Lightning Network payments, Square and other modern payment processors, any Bitcoin wallet showing small amounts.
The Bitcoin community is increasingly standardizing on satoshis for everyday use. “Stacking sats” has become a common phrase for accumulating small amounts of Bitcoin. As Lightning Network adoption grows, sats are becoming the de facto unit for payments.
Quick conversion reference
At $96,000 per BTC:
| Amount | In sats | Approximate USD |
|---|---|---|
| Cup of coffee ($5) | ~5,200 sats | $5.00 |
| Lunch ($15) | ~15,600 sats | $15.00 |
| 1 mBTC | 100,000 sats | $96.00 |
| 1,000,000 sats | 1,000,000 sats | $960.00 |
Use the BitcoinUnit converter to get exact values at the current live price.
Which unit should you use?
- Receiving a large payment or investment? Use BTC
- Paying or receiving on Lightning? Use sats
- Building something on Bitcoin? Use sats — it is the community standard for development
- Talking to a beginner? Use the dollar equivalent and explain sats alongside it