Cubic feet calculator (ft to ft3) – online volume calculation

Calculate volume in cubic feet (ft³) from width, length and height in feet. A 4 × 8 × 2 ft space is 64 ft³ (≈ 2.37 yd³, 1.81 m³).

64 ft³ 4 ft × 8 ft × 2 ft = 64 ft³
W × L × H (ft)Volume (ft³)Volume (yd³)Volume (m³)

How to calculate cubic feet

ft³ = width(ft) × length(ft) × height(ft). Convert inches first (in ÷ 12) so all three dimensions are in feet.

Common mistake

Leaving one dimension in inches. A 4 × 8 ft area with a 6 in depth is 4 × 8 × 0.5 = 16 ft³, not 4 × 8 × 6 = 192 ft³.

Square feet to cubic feet · Cubic yard calculator · Cubic feet to square feet

Misha Noyr, M.Eng.

Misha Noyr, M.Eng.

Civil Engineer · 15+ yrs · structural design, geotechnics. Full bio ↓