Bullet Energy Calculator

Basic Calculator
150 1500
Energy: 0
Advanced Features
Estimated Energy at Distance:
Side-by-Side Comparisons
Bullet Weight Velocity Energy Distance Energy@Distance
Bullet 1
Bullet 2
How to Use This Calculator

1. Adjust the bullet weight and velocity sliders to approximate your desired load.
2. Choose the correct units for weight (grains or grams) and velocity (fps or m/s).
3. Monitor the displayed energy, selecting either ft-lb or joules.
4. Use the “Advanced Features” to see how distance, altitude, and temperature might affect energy over range.

You can also select common presets for popular calibers, helping you quickly fill in typical values. After you’re satisfied with the bullet parameters, use the “Add to Comparison” button to compare two different sets of data side by side.

Example Calculations
Caliber Bullet Weight Velocity Distance Approx. Energy (ft-lb)
9mm 115 grains 1150 fps 25 yards ~338 ft-lb
5.56 NATO 55 grains 3000 fps 100 yards ~1099 ft-lb
7.62 NATO 147 grains 2750 fps 200 yards ~2002 ft-lb

These approximate values are for example purposes only. For precise calculations, enter actual data based on your specific conditions.

Frequently Asked Questions
Why is bullet weight measured in grains?
Grains are a historic unit of mass commonly used in the firearms industry. One grain is exactly 1/7000th of a pound.
What should I enter for altitude?
Enter the elevation above sea level where you expect to fire. Higher altitude typically reduces air pressure, affecting bullet velocity over distance.
What are some typical applications for this calculator?
It can be useful for hunters, sports shooters, and those interested in ballistics to estimate bullet energy and how various factors affect performance.

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