Transactions & fees

RBF Fee Bump Calculator

Learn the review process for increasing a replacement transaction fee.

Runs locally

Security & privacy. Calculations run locally. Check the network and inputs. Estimates of fees, policy acceptance, prices and future block timing are not guarantees.

Use this tool

Calculates on your device. Results that depend on future blocks or policy are estimates.

Single conflict with no descendants. Relay rate is node-specific. This calculation cannot guarantee replacement acceptance.

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What this tool is for

Replace-by-fee creates a replacement transaction under applicable node policy. Fee requirements and wallet support matter; an increased fee alone does not guarantee acceptance or confirmation.

Supported behavior

Single conflict with no descendants. Relay rate is node-specific. This calculation cannot guarantee replacement acceptance.

Security & privacy

Calculations run locally. Check the network and inputs. Estimates of fees, policy acceptance, prices and future block timing are not guarantees.