Enjoy our FREE muzzle energy calculator. Enter pellet weight and velocity to instantly check ft-lb output and ensure your rifle stays under the 12 ft-lb legal limit.
Muzzle Energy Calculator
Enter valid numbers for both fields.
UK Law Reminder: Air rifles must not exceed 12 ft-lb muzzle energy (without an FAC).
Air pistols must not exceed 6 ft-lb. Always confirm with a calibrated chronograph.
