CPFP Calculator

GitHub: https://github.com/tomunchained/cpfp_calculator

This is a tool to help you calculate a fee rate to use for a Child-Pays-For-Parent transaction, which should result in an effective fee rate for the original transaction that is very close to the current high priority fee rate.

Note: This tool assumes the CPFP transaction will use 1 input and 1 output, the simpliest method of achieving a CPFP acceleration. It also assumes no other accelerations are involved.

Enter the TXID for the transaction you want to accelerate:

CPFP input type:

CPFP output type:

The input type can be determined by examining the address you're spending from, to perform the CPFP. The output type corresponds to the new destination address. Learn more about address types.

Parameters Used

Original Fee Rate (sats/vB): N/A

Original Transaction Fee (sats): N/A

Original Transaction Size (vB): N/A

CPFP Transaction Size (vB): N/A

Current High Priority Rate (sats/vB): N/A

Result

CPFP Fee Rate (sats/vB): N/A

This is the fee rate you should choose for your CPFP transaction in order to get an effective fee rate approximately equal to the current high priority fee rate, for both transactions.

CPFP Fee (sats): N/A