Bitcoin Unit Converter: BTC, Satoshis, mBTC and Bits
Convert between bitcoin, millibitcoin, bits and satoshis instantly, with an optional dollar value from a price you enter. Free and private.
Convert bitcoin units
Type an amount in any box and the others update. Nothing you enter leaves your browser.
One bitcoin can be divided into 100 million satoshis, and the satoshi, or sat, is its smallest unit. Bitcoin also has two larger everyday units, the millibitcoin (mBTC), which is one thousandth of a bitcoin, and the bit (µBTC), which is one millionth, or 100 satoshis. The converter above turns an amount in any of these units into all the others, exactly, with no rounding errors.
The four units
| Unit | Symbol | Value in BTC | Value in satoshis |
|---|---|---|---|
| Bitcoin | BTC | 1 | 100,000,000 |
| Millibitcoin | mBTC | 0.001 | 100,000 |
| Bit (microbitcoin) | bit or µBTC | 0.000001 | 100 |
| Satoshi | sat | 0.00000001 | 1 |
Common amounts
| Satoshis | BTC | mBTC | Bits |
|---|---|---|---|
| 1 | 0.00000001 | 0.00001 | 0.01 |
| 100 | 0.000001 | 0.001 | 1 |
| 1,000 | 0.00001 | 0.01 | 10 |
| 10,000 | 0.0001 | 0.1 | 100 |
| 100,000 | 0.001 | 1 | 1,000 |
| 1,000,000 | 0.01 | 10 | 10,000 |
| 10,000,000 | 0.1 | 100 | 100,000 |
| 100,000,000 | 1 | 1,000 | 1,000,000 |
Why bitcoin has such small units
Bitcoin is divisible to eight decimal places, so owning a fraction of a bitcoin is completely normal. Most people hold far less than one whole bitcoin, and long strings of zeros are easy to misread, so some wallets and apps show balances in satoshis instead. The satoshi is named in honor of Bitcoin’s creator, who used the name Satoshi Nakamoto. The History of Bitcoin tells that story, and What Is Bitcoin? explains the 21 million coin limit these units divide up.
Using the optional dollar value
The dollar boxes work from a price you type in. This site does not fetch live prices, so the conversion never goes stale and never implies a forecast. It is plain arithmetic. As an illustration only, at a made-up price of $50,000 per bitcoin, 100,000 satoshis (0.001 BTC) is worth $50. You can also type a dollar amount to see how many satoshis it would be at the price you chose.
Good to know
- Always check which unit a wallet or exchange is displaying before sending bitcoin. Mixing up BTC, mBTC and satoshis is an expensive mistake, and bitcoin payments are generally irreversible.
- Bits are not used the same way everywhere. Some software uses the word differently, so confirm the unit in the app you are using.
- On the base layer, nothing smaller than one satoshi can be sent. The Lightning Network handles very small payments differently.
Related guides
- What Is Bitcoin?: the fundamentals, including the supply limit.
- How Does Bitcoin Work?: how transactions and amounts are recorded.
- Halving and supply explorer: how much bitcoin exists for any year or block height.
- All tools: more free calculators and guides.
Frequently asked questions
How many satoshis are in one bitcoin?
There are 100,000,000 satoshis in one bitcoin. A satoshi, often shortened to sat, is the smallest unit of bitcoin and equals 0.00000001 BTC.
How much is one satoshi in BTC?
One satoshi equals 0.00000001 BTC, one hundred-millionth of a bitcoin. The unit is named in honor of Bitcoin's creator, who used the name Satoshi Nakamoto.
What is a bit in Bitcoin?
A bit, also called a microbitcoin or µBTC, is one millionth of a bitcoin, which equals 100 satoshis. Some wallets use it as a display unit, but naming varies, so check which unit your wallet is showing.
What is an mBTC?
mBTC means millibitcoin. One mBTC is one thousandth of a bitcoin, or 100,000 satoshis.
Does this converter use live prices?
No. It converts between bitcoin units using fixed ratios. If you want a dollar value, you type in a price yourself, so the result never depends on a live feed and is arithmetic, not a prediction.
Can bitcoin be divided into anything smaller than a satoshi?
On Bitcoin's base layer, no: one satoshi is the smallest amount that can be recorded. Systems built on top of Bitcoin, such as the Lightning Network, may track smaller fractions internally.