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Educational tool
Explore how transaction size and fee rate affect a Bitcoin network fee. This tool does not predict network conditions or guarantee confirmation times.
Fee = transaction size × fee rate. Fiat values are approximate and can change quickly.
Fees pay for limited block space and are generally based on transaction size in virtual bytes, not the amount of bitcoin sent. Higher demand can increase fees. Confirmations depend on network conditions and are not guaranteed by a chosen fee.
A standard 225 vB transaction at 15 sat/vB: 225 × 15 = 3,375 sats, or 0.00003375 BTC. Fiat value is approximate.
Fees do not simply depend on the bitcoin amount sent. Higher fees do not guarantee immediate confirmation, wallets may calculate fees differently, fees do not always stay high, and miners do not set an individual user's chosen fee.
Question 1 of 5
What does sat/vB measure?
It is a fee rate measured in satoshis per virtual byte of transaction size.
Fees can change as demand for limited block space changes.
Not necessarily. Fees generally depend on transaction size and fee rate, not simply the amount sent.
Wallets may offer fee-selection options, but a chosen fee does not guarantee a confirmation outcome.
A transaction may wait longer in mempools while network conditions change; no outcome or timing is guaranteed.
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