Airsoft Calculator

Your site may chronograph in Feet Per Second (fps) however, as far as the law is concerned you should be measuring the power in Joules. As per the Police & Crime Act, the legal limit is 1.3J for Automatic Weapons, or up to 2.5J for a Semi-Automatic (DMR/Bolt Action).

Your Currently Shooting At: Joule(s)


Airsoft Energy Chart:

The 2 charts below show the Joule Limits based on specific BB weights.

  • Note:
  • The top chart is for fully-automatic RIFs & bottom one is for semi-automatic.
  • Green indicates a safe joule limit
  • Yellow shows a safe but narrow gap in restrictions.
  • Red is over the legal limit.

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