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Want to know the real power of your airsoft replica?
With our online Joule/FPS converter, you can instantly calculate the kinetic energy of your 6mm airsoft ball (in joules) from its speed (FPS - Feet Per Second), or do the reverse operation to obtain speed from power.
How to use the converter
This calculation takes into account standard airsoft parameters and applies to all replica types: AEG, GBB, GBBR, spring sniper, HPA, etc.
For airsoft replicas, it's very important to know their power before use, to comply with current legal regulations.