Cubic inch calculator (in to in3) – online volume calculation

Calculate volume in cubic inches (in³) from width × length × height in inches. A 6×6×6 in box is 216 in³ (≈ 3539 cm³, 3.54 L).

— in³
W×L×H (in)in³cm³L

How to calculate cubic inches

in³ = width(in) × length(in) × height(in). Convert other units to inches first (ft × 12, cm ÷ 2.54).

Common mistake

Mixed units. A 1 ft × 12 in × 12 in box is 12×12×12 = 1728 in³, not 1×12×12 = 144 in³ — convert the foot to inches first.

Cubic centimetres · Cubic feet calculator