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Tool 01 / network

Bitcoin fee calculator

Fee example: 140 vB times 20 sat/vB equals 2,800 satsFee example: 140 vB times 20 sat/vB equals 2,800 sats

20 sat/vB × 140 vB = 2,800 sats (0.000028 BTC). Enter your wallet's values to estimate the fee.

Build the estimate

Starting values are examples; your wallet's fee rate and size may differ.

Use your wallet's fee estimate or a current mempool estimate. A target is not a guarantee.
Find this in your wallet's preview. 140 vB is only an example. See how size affects fees.
Dollars for one BTC, from a price source you choose. This changes the dollar estimate; the fee in satoshis stays the same.

Formula: fee rate × virtual bytes, rounded up to whole satoshis. A dollar value depends on the BTC price you enter.

Bitcoin fee questions

How is a Bitcoin fee calculated?

Multiply your proposed sat/vB fee rate by the transaction size in virtual bytes. This tool rounds up to whole satoshis; the final size and total debit should be checked in your wallet.

Does a fee target guarantee confirmation?

No. Block space demand and block arrival times change. A rate estimate cannot reserve space in a block or promise a deadline.

Why might the dollar fee differ from the market ticker?

The dollar estimate uses the BTC price you enter in the form, which starts with an illustrative value. The fee in satoshis does not change when you edit only the BTC price.

Where can I find my transaction size?

Look for virtual size in your wallet's transaction preview or coin-control details. The starting 140 vB is an example and cannot describe every payment.

HashrateTimes editorial · Updated