Steel Bar Weight Per Foot: Round, Square and Flat Bar Reference Table

Steel bar weight per foot for a 1-inch MS round bar is 1.213 kg/ft (2.67 lb/ft), calculated by converting the metric IS standard formula to foot-based units. This reference table covers round, square and flat mild steel bar sections in both lb/ft and kg/m — the two unit systems that coexist in Indian steel yards, fabrication shops and construction sites.

Why Foot-Based Weight Calculations Are Still Used in India

Walk into any steel yard in Gujarat, Maharashtra or Rajasthan and you will hear bar lengths quoted in feet, not metres. A contractor asking for "20mm round bar, 20 foot length" is not being imprecise — he is working in the unit system his site uses for day-to-day measurement. Cutting machines in older workshops are calibrated in inches. Billing software at smaller distributors still quotes price per foot-run.

IS 1732 specifies round and square bar dimensions in metric. IS 1730 covers flat bar in metric. But the practical need to cross between systems is real, and errors in conversion cost money — both in over-ordering material and in under-engineering brackets and supports. This table bridges both systems so you can work in whichever unit your job requires without manual conversion.

Steel Bar Weight Formulas — Per Foot and Per Metre

All three bar types derive from the same density base (7.85 g/cm³). The metric formula for each section is:

• Round bar: Weight (kg/m) = D² / 162 — where D is diameter in mm
• Square bar: Weight (kg/m) = S² × 0.00785 — where S is side length in mm
• Flat bar: Weight (kg/m) = W × T × 0.00785 — where W is width and T is thickness in mm

To convert kg/m to kg/ft, divide by 3.281. To convert kg/m to lb/ft, multiply by 0.6720. These conversion factors are fixed — they do not change by bar size or grade.

For inch-dimension inputs, convert to millimetres first (1 inch = 25.4mm), apply the metric formula, then convert the result to per-foot. Do not apply imperial formulas directly — they use different density constants that assume lb/in³ units and produce errors when mixed with metric IS data.

Worked Example: 1-Inch MS Round Bar Weight Per Foot

*Saria ka weight per foot kaise nikale?* — this is one of the most common questions I get from site engineers who buy bar in foot lengths but need to verify invoice weights. Here is the complete calculation for a 1-inch (25.4mm) mild steel round bar.

Given:

• Diameter: 1 inch = 25.4mm
• Section: Round bar, mild steel

Step 1 — Weight per metre (metric formula):
Weight = D² / 162 = 25.4² / 162 = 645.16 / 162 = 3.982 kg/m

Step 2 — Convert to kg per foot:
3.982 ÷ 3.281 = 1.213 kg/ft

Step 3 — Convert to lb per foot:
3.982 × 0.6720 = 2.677 lb/ft

Step 4 — Practical check: A SAIL 1-inch round bar in a 20-foot length weighs 1.213 × 20 = 24.26 kg. A bundle of 10 pieces weighs 242.6 kg — useful for vehicle load planning.

You can verify any bar weight instantly using the free Metal Weight Calculator → — select Round Bar, enter 25.4mm diameter and your required length.

Round Bar Weight Per Foot — IS 1732 Reference Table

Values below are calculated using D²/162 for kg/m and converted. Sizes listed in inches (common market denomination) with exact mm equivalent per IS 1732. SAIL and Tata Steel supply these sizes as standard stock.

Square Bar Weight Per Foot — IS 1732 Reference Table

Flat Bar Weight Per Foot — IS 1730 Reference Table

Flat bar weight depends on both width and thickness. The table below covers the most common width-thickness combinations. For other combinations, use: Weight (kg/m) = W × T × 0.00785, then convert as above. The MS round bar weight guide → covers the full range of metric sizes if your job uses mm-denomination bars.