# CPFP Fee Calculator

> Learn how a child transaction can affect a transaction package’s fee rate.

Mode: Runs locally.

## Supported behavior

Single parent and child. Apply the child's standalone relay floor separately; package acceptance is not guaranteed.

## Security and privacy

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

[Security model](https://qbitcoin.live/security/index.md) · [QBitcoin home](https://qbitcoin.live/index.md)