Select a BB weight and enter a valid number greater than zero.

J = BB mass (g) × [ velocity (m/s) ]² ÷ 2000 · m/s = fps × 0.3048
J/cm² = J ÷ [ π × (0.3 cm)² ] · Using a nominal 6.00 mm diameter

Hold the above m/s constant to calculate joules and energy per area for other 6 mm BB weights.

ⓘThe table assumes velocity stays constant when BB weight changes; actual velocity and energy may differ. J/cm² uses a nominal 6.00 mm diameter. Re-chrono with each weight; this estimate does not replace official testing.