Crypto Unit Converter
Convert between crypto denominations with live USD prices
1 BTC = 100,000,000 satoshis
Millibitcoin — 1 BTC = 1,000 mBTC
Microbitcoin — 1 BTC = 1,000,000 bits
Smallest BTC unit — 1 BTC = 100,000,000 sats
Live price: $69,574.24 / BTC
1 BTC = 1,000 mBTC
1 BTC = 1,000,000 bits (μBTC)
1 BTC = 100,000,000 satoshis (sats)
1 mBTC = 100,000 satoshis
1 bit = 100 satoshis
Bitcoin Denominations
Bitcoin is divisible to 8 decimal places. The smallest unit, a satoshi (sat), is named after Bitcoin's pseudonymous creator, Satoshi Nakamoto. One bitcoin equals 100 million satoshis. As Bitcoin's price has grown, smaller denominations have become increasingly useful for everyday transactions.
BTC — The base unit. 1 BTC.
mBTC (millibitcoin) — One thousandth of a bitcoin. Used for medium-value transactions.
bit / μBTC (microbitcoin) — One millionth of a bitcoin. Sometimes called a "bit" for simplicity.
Satoshi (sat) — The atomic unit. 1 sat = 0.00000001 BTC. Widely used on the Lightning Network.
Ethereum Denominations
Ethereum is divisible to 18 decimal places. The smallest unit is a wei, named after Wei Dai, a cryptography pioneer. The most commonly used sub-unit is gwei (gigawei), which is the standard denomination for gas prices on the Ethereum network.
ETH (Ether) — The base unit. 1 ETH.
Finney — Named after Hal Finney. 1 ETH = 1,000 Finney. Useful for DeFi amounts.
Gwei (gigawei) — 1 ETH = 1 billion Gwei. The standard unit for gas prices.
Wei — The atomic unit. 1 ETH = 1018 Wei. Used in smart contracts.
Why Satoshis Matter
The Lightning Network, Bitcoin's layer-2 scaling solution, processes transactions in satoshis. As Bitcoin adoption grows, pricing items in sats rather than BTC becomes more practical — saying "5,000 sats" is more intuitive than "0.00005 BTC". Many wallets and exchanges now support "sats mode" for this reason. The trend of denominating in satoshis is sometimes called "stacking sats."
Gas Prices in Gwei
Every Ethereum transaction requires gas, which is priced in gwei. A typical transfer might cost 21,000 gas units at 20 gwei per unit. After EIP-1559, gas fees are split into a base fee (burned) and a priority tip (paid to validators). Understanding gwei is essential for optimizing transaction costs — during high-traffic periods, gas can spike to hundreds of gwei, while off-peak times may see fees as low as 5-10 gwei.