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Joule/FPS calculator

Joule/FPS calculator

With this converter you can calculate velocity and energy of airsoft BBs. In addition, the theoretical effective distance that the BBs travel.

However, take into account external influences, the weather or the angle of the replica when firing will cause the distance to deviate from the calculated result below.

The standard rules differ from organisation to organisation. Make sure to check them first.
More information on safety and joule-creep can be found on

Calculate velocity (m/s) and energy (Joule)




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Calculate velocity (FPS & m/s) and distance (feet & meters)



Theoretical distance: