Airsoft power calculator
FPS & Joule Calculator
Convert between muzzle velocity and muzzle energy using the standard kinetic-energy formula. Choose FPS or Joules as the result, then enter the known BB weight.
What do you want to calculate?
The selected result field is calculated automatically.
Common BB weights
Enter FPS and BB weight to calculate muzzle energy.
Calculated result
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Same muzzle energy
Equivalent FPS by BB weight
These values show the theoretical FPS that corresponds to the same calculated Joule value.
| BB weight | FPS | m/s |
|---|