How this calculator works
01
Choose the input address type, set input and output counts, and enter the fee rate and optional BTC price.
02
CoinCalcs validates the manual inputs and applies this published model: Fee in satoshis = estimated virtual bytes × sat/vB
03
The result is calculated locally in the browser and is not sent to CoinCalcs or a market-data provider.
Formula
The calculation
Fee in satoshis = estimated virtual bytes × sat/vBExample
A concrete scenario
A native SegWit transaction estimated at 141 vB with a 5 sat/vB rate costs about 705 satoshis.
Sources used
CoinCalcs methodologyManual-input model with arbitrary-precision decimal arithmeticmempool.spaceFee-rate units and network-priority reference
Privacy: Calculator inputs are processed locally in your browser. CoinCalcs does not receive or store these inputs. Theme and cookie preferences may be stored on this device.
What this estimate cannot guarantee
- Exact weight depends on the real script types, signatures, witness data, change output, and wallet coin selection.
- The result is only as current and accurate as the assumptions entered in the form.
- The output is educational scenario arithmetic, not financial, investment, tax, legal, or security advice.