Joule and Speed Calculator
Use this calculator to calculate the muzzle velocity (fps and m/s) and energy (joules) for your airsoft gun or air rifle. You can enter the bullet/shot weight in grams and either the energy in joules or the muzzle velocity in fps or m/s, and the calculator will automatically calculate the other values. To use the calculator:
- Enter the weight of your bullets or shot in grams (e.g. 0.20 for airsoft bullets or 0.80 for air rifle shot).
- Enter either the energy in joules, the velocity in fps (feet per second), or the velocity in m/s (meters per second), depending on what you know.
- Press "Calculate exit velocity" and the calculator will show both the speeds in m/s and fps as well as the energy in joules.
Enter your values
Calculated values
How does a joule and speed calculator work?
This calculator allows you to easily convert between energy (joules), velocity in meters per second (m/s), and velocity in feet per second (fps). For airsoft players and airgun owners, it is essential to know both the muzzle velocity and energy to ensure that the weapons comply with the permitted safety limits.
How is energy in joules calculated?
The energy in joules is calculated using the bullet or shot weight and the velocity of your projectile. The formula for calculating energy is:
Joule = 0.5 * bullet weight (kg) * velocity² (m/s)
With this calculator you can quickly and easily enter your bullet/shot weight and either velocity or energy, after which the other values are automatically calculated.
Why is it important to know the exit velocity?
Muzzle velocity is crucial for both accuracy and safety when using an airsoft gun or air rifle. If your gun has too high a muzzle velocity, it could violate safety regulations at shooting ranges or airsoft ranges. It is important to test your gun regularly to ensure it is within the permitted limits. Use this calculator to ensure your muzzle velocity and energy are at the right level.
