BTC Unit Converter
BTC Unit Converter converts BTC, mBTC, bits and satoshis with exact integer math and a live USD reference. For transfers, sat/vB fees and Lightning checks.
Calculations and checks on this page run in your browser. Private keys and seed phrases are never uploaded to the server.
About this tool
BTC Unit Converter converts between satoshis (sat) and BTC, mBTC and related units: 1 BTC = 10⁸ sat. Explorers and wallets often show small balances and fees in sats.
The tool converts BTC, mBTC, μBTC (bits) and sat exactly in the local browser, with an optional public-market USD reference.
Integer math keeps sat-level precision so you can cross-check explorers and fee estimators without floating-point drift.
How to use
- Enter a value in any unit field.
- Other units and the USD reference update together.
- Copy the unit or valuation you need.
FAQ
How many satoshis are in 1 bitcoin?
1 BTC = 100,000,000 sat (10⁸); 1 sat = 10⁻⁸ BTC.
What are mBTC and μBTC (bits)?
1 mBTC = 10⁻³ BTC = 100,000 sat; 1 μBTC (bit) = 10⁻⁶ BTC = 100 sat.
What does sat/vB mean for Bitcoin fees?
It is sats paid per virtual byte. Total fee ≈ rate × transaction vSize; raise the rate when mempools are congested.
Where does the BTC USD estimate come from?
A public market API BTC/USD reference, updated about every minute, for research only—spot quotes can differ by venue.