Beam Rebar calculation

Beam Rebar Calculator (per 1 meter)

Compute weight per running meter for longitudinal bars (e.g., 6DB16) and stirrups (e.g., RB6 @ 100). Uses unit weight ≈ d²/162 kg/m.

Longitudinal Bars

Number of Bars (pcs)

Diameter (mm)

Anchorage/Waste (%)

Length accounted (m/m)

uw: — kg/m

Per meter of beam, longitudinal length ≈ (number of bars × 1 m). Add waste/anchorage as needed.

Stirrups

Stirrup Dia (mm)

Spacing (mm)

Beam Width b_w (mm)

Beam Depth h (mm)

Concrete Cover (mm)

Hook length per end (mm)

Waste/Laps for Stirrups (%)

Ends with hooks Both ends One end No hook

uw: — kg/m

Stirrup perimeter at centerline ≈ 2×[(b − 2×cover + d) + (h − 2×cover + d)] + hooks.

Global Options

Additional Global Waste (%)

Round Counts Exact (per m) Ceil stirrups per m

Unit weight formula: d²/162 (kg/m). Stirrups/m ≈ 1000/spacing (ceil for conservative BOQ).

Unit weight — Longitudinal—

Unit weight — Stirrups—

Longitudinal: bars × length per bar—

Stirrups per meter—

Length per stirrup—

Total stirrup length per m—

Weight — Longitudinal (no global waste)—

Weight — Stirrups (incl. stirrup waste)—

Total (no global waste)—

Total with global waste—

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