About AirsoftCalc

AirsoftCalc is a set of calculators for the numbers airsofters deal with every game day: muzzle energy, BB-weight conversion, battery life and more. It is written in Japan, where airsoft started, and published in Japanese and English.

The formulas are basic physics plus figures published by manufacturers and industry bodies. Legal limits are taken from primary sources but laws change; always chrono your gun and follow your field’s rules.

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Corrections and suggestions are welcome through the contact form (coming soon).