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Flat Bar Weight Calculator — kg/m, lb/ft & Batch Weight

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Width / thickness unit Flat width Thickness Piece length unit Piece length Number of pieces Whole pieces only.Material density (kg/m³) Carbon steel commonly uses 7,850 kg/m³; use documented alloy data when needed.Procurement allowance (%) Applied to order mass, not theoretical kg/m.Rate per kg (optional) 0 disables cost.Target mass unit Target mass (optional) Reverse-solves whole entered-length pieces.Supplier / measured kg per metre (optional) Reports variance without replacing theoretical geometry.

Calculated result

117.75 kg · 259.59 lb

1.9625 kg/m · 1.3187 lb/ft

250 mm² cross-section · 11.775 kg per entered-length piece

117.75 kg net batch mass

Enter rate/kg for procurement cost

Enter target mass for reverse whole-piece count

Enter supplier kg/m to compare delivered/table mass

Show the working

1. Area = 50 × 5 = 250 mm².
2. Unit mass = 250 × 10⁻⁶ × 7,850 = 1.9625 kg/m.
3. Piece mass = 1.9625 × 6 = 11.775 kg.
4. Net batch = 11.775 × 10 = 117.75 kg.

This is theoretical mass from nominal rectangular dimensions and entered density. Rolling tolerances, edge shape, coatings and alloy chemistry can change delivered mass. Use supplier or governing-standard data when contractual, lifting-critical or safety-critical mass matters.

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