How does the bitcoin fee estimator work?
Estimated vbytes = transaction overhead + input count × input vbytes + output count × output vbytes. Fee = vbytes × sat/vB, rounded up to whole satoshis.
Bitcoin Fee Estimator
Estimate Bitcoin transaction fees from current mempool rates and transaction size.
Inputs
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Estimated miner fee
209 vB
Estimated transaction size
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Fee amount
How it’s calculated
Estimated vbytes = transaction overhead + input count × input vbytes + output count × output vbytes. Fee = vbytes × sat/vB, rounded up to whole satoshis.
Assumptions
Input and output sizes are standard estimates. Actual transaction weight depends on the wallet, scripts, and witness data. USD value uses the current BTC price.
Sources
Fee recommendations by mempool.space. BTC USD price by CoinGecko.
FAQ
Where does the live data come from?
Fee recommendations by mempool.space. BTC USD price by CoinGecko.
Can I rely on this estimate?
Input and output sizes are standard estimates. Actual transaction weight depends on the wallet, scripts, and witness data. USD value uses the current BTC price.
Is this financial advice?
No. This tool provides informational estimates only.