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Airsoft Joule Calculator

Convert BB Weight & Velocity to Joules — Global Safety Standard

Safety First: This airsoft joule calculator ensures compliance with field limits. Always use eye protection.

Convert any BB weight and velocity to joules using our airsoft joule calculator.

200–700 FPS

Enter BB specs

Quick FPS-to-Joule conversion for chronograph readings with our airsoft joule calculator.

Convert FPS reading

Check if your setup meets field joule limits using our airsoft joule calculator.

Check compliance

Compare joules across BB weights at fixed FPS with our airsoft joule calculator.

Compare BB weights

Airsoft Joule Calculator: Global Safety Compliance Tool

Our airsoft joule calculator is trusted worldwide — from European CQB arenas to Asian outdoor fields — to ensure every shot stays within safe energy limits.

"Primum non nocere" — First, do no harm.

How the Airsoft Joule Calculator Works

Uses the fundamental kinetic energy formula:

Joules = ½ × mass(kg) × velocity²(m/s)
1 Joule = 0.5 × (BB grams / 1000) × (FPS × 0.3048)²

Automatically converts FPS to M/S and grams to kilograms.

Airsoft Joule Calculator: Four Essential Modes

Basic Conversion Mode

Full flexibility: any BB weight + any velocity = precise joules in our airsoft joule calculator.

FPS to Joules Mode

Quick chronograph conversion for field techs.

Field Limit Checker Mode

Instant compliance check against 1.0–3.0 J limits.

BB Weight Comparison Mode

Visualize energy differences at fixed velocity.

Airsoft Joule Calculator: Global Field Limits

Gun Type Max Joules 0.20g FPS Min Engagement
Pistol / CQB 1.0 J 328 FPS 5m
AEG / Rifle 1.5 J 400 FPS 10m
Sniper (Semi) 2.3 J 500 FPS 20m
DMR / Bolt Action 3.0 J 550 FPS 30m

Airsoft Joule Calculator: BB Weight vs Energy

Heavier BBs carry more energy at the same FPS:

  • 400 FPS with 0.20g = 1.49 J
  • 400 FPS with 0.30g = 2.23 J (50% more!)
  • Always chrono with the heaviest BB you’ll use

Pro Tips for Using the Airsoft Joule Calculator

  1. Chrono with field BBs — not lighter ones
  2. Test multiple shots — average the highest 3
  3. Account for hop-up — can reduce FPS slightly
  4. Check local rules — some fields use 0.20g standard
  5. Re-chrono after upgrades

Play Safe, Play Fair

From Tokyo skirmishes to European milsim events, our airsoft joule calculator keeps the game safe and fun for everyone.

Calculate Joules Now