Tools for playerswho take it seriously.
Free airsoft calculators, tables and references. Fast, readable, honest — no paywall, no tracking.
Joule Calculator
Convert spring, BB weight and velocity into joules and FPS. Compare every BB weight, pick the right ammo and check legal limits across major European countries.
Open the calculator →Spring Upgrade
Got an M100 reading 311 FPS? Mentally swap springs and see what M120, M130 or beyond would actually do. Preserves your real gearbox efficiency and projects expected velocity and energy.
Plan the upgrade →Effective Range
Estimate the realistic effective range of your replica based on joules, BB weight and hop quality. Returns a low–high band plus a comparison table across all BB weights.
Estimate range →Battery Runtime
How long does your LiPo or NiMH actually last? Plug in capacity, motor draw and play style and get realistic runtime — not the datasheet promise.
Estimate runtime →ROF Calculator
BBs per second from motor, battery voltage and gear ratio. Compare torque-up, standard and high-speed setups.
Calculate ROF →Airsoft glossary
COMING SOONEvery technical term explained: AEG, GBB, hop-up, MED, DMR, RIF and more.
Field MED database
COMING SOONMinimum engagement distances by field, crowdsourced by the community.