Rebar Calculator

Calculate rebar count, total length and weight for slabs, beams, columns and foundations.

Element Type

Length

Width

Depth / Height

Bar diameter

Spacing

c/c in mm

Layers

Cover

Bar Count

—

Total Length

—

Total Weight

—

Steel Rate

—

kg/m³

T8 0.395 kg/m 50.3 mm²

T10 0.617 kg/m 78.5 mm²

T12 0.888 kg/m 113.1 mm²

T16 1.579 kg/m 201.1 mm²

T20 2.466 kg/m 314.2 mm²

T25 3.854 kg/m 490.9 mm²

T32 6.313 kg/m 804.2 mm²

Slab (domestic) 50–80 kg/m³

Slab (commercial) 80–130 kg/m³

Beam 90–160 kg/m³

Column 150–350 kg/m³

Foundation 60–100 kg/m³

Minimum cover per BS EN 1992: Internal 25 mm, External 30–40 mm, Foundations 40–50 mm. Always check exposure class.