Skip to main content
Calcimator

Muzzle Energy Calculator

Calculate muzzle energy in foot-pounds and joules from bullet weight and muzzle velocity. Also computes power factor and momentum.

Inputs

gr
fps

Results

Muzzle Energy

2,560 ft-lbs

Muzzle Energy3,470 J
Momentum411,600 gr·fps
Power Factor411.6
How to Use This Calculator
  1. Enter Bullet Weight and Muzzle Velocity.
  2. Review the Muzzle Energy (ft-lbs) result.
  3. Use Muzzle Energy (J) and Momentum (gr·fps) to inform your decision.
  4. Use the chart to visualize the results and explore different scenarios by adjusting inputs.

How the result changes with Muzzle Velocity

Muzzle VelocityMuzzle Energy
770194 ft-lbs
1,9451,235 ft-lbs
3,3553,675 ft-lbs
4,5306,700 ft-lbs

What each input means

Bullet Weight
Bullet weight in grains.
Muzzle Velocity
Bullet velocity at the muzzle in feet per second.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    Bullet Weight = 147, Muzzle Velocity = 2800 = 2 input(s) provided
  2. Calculate Muzzle Energy
    Muzzle Energy
    2560 = 2560
  3. Calculate Muzzle Energy
    Muzzle Energy
    3470 = 3470
  4. Calculate Momentum
    Momentum
    411600 = 411600

Engine last updated . Checked against 3 independently-derived tests — how we verify calculators.

Related Calculators

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Ballistics

Energy at Impact Calculator

Calculate remaining kinetic energy and velocity at any distance from bullet weight, muzzle velocity, and ballistic coefficient.

Ballistics

External Ballistics Calculator

Calculate bullet trajectory from muzzle velocity, ballistic coefficient, and environmental conditions. See drop, velocity, and energy at range.

Electrical Engineering

Power Factor Correction Calculator

Calculate the capacitor bank size (KVAR) needed to improve power factor and estimate energy cost savings.

Physics

Momentum Calculator

Linear momentum, impulse, and kinetic energy from mass and velocity.

Ballistics

Barrel Twist Rate Calculator

Calculate optimal barrel twist rate from bullet length and diameter using the Greenhill formula. Accounts for bullet material density.

More in Sports, Outdoors & Recreation.