All tools

• FPS to joules calculator

  Muzzle energy from velocity and BB weight, checked against Japan’s 0.98 J legal limit and common field limits.

• BB weight FPS converter

  Convert a chrono reading on 0.20 g BBs to the velocity you’ll get with 0.25 g, 0.28 g and heavier.

• Battery life calculator

  Rough shots per charge and games per battery from capacity, chemistry and motor type.

• Starter kit budget

  Pick a play style and a tier to get a full starter loadout estimate with a breakdown.

• Effective range estimate

  Rough effective range from muzzle energy and BB weight.

• Gear ratio and rate of fire

  Rounds per second from motor speed, battery voltage and gear ratio.

• Unit converter

  FPS and m/s, joules, grains and grams, inches and millimetres.

• Game day cost calculator

  Entry fee, travel, rentals and BBs totalled per person and per day.

• Gas gun temperature chart

  How much a gas gun’s velocity changes with temperature, for HFC134a and green gas.

• Game day checklist

  Tick off your kit before you leave. Printable, and it remembers your ticks.