I Beam Weight Calculator
I-beam weight is the number one spec that ships with every structural steel order. This i beam weight calculator computes weight per foot, per meter, and total weight from the flange and web dimensions you can read off a drawing or shop ticket. Results match the AISC W-shape table and standard ms i beam weight calculator charts (IS 808 / ISMB) within a fraction of a pound per foot.
I Beam Weight Calculator in Pounds
The I beam weight calculator in pounds uses the American standard 490 lb/ft³ density for carbon steel (A36, A992). Weight per foot is the industry quoting unit in North America. For example, a W10x33 is 33 lb/ft by name; the "33" comes from this exact calculation.
I-Beam Weight per Foot and per Meter
- I-beam weight per foot is measured in lb/ft. A W8x18 is 18 lb/ft. A W12x26 is 26 lb/ft. The second number in a W designation is always the weight per foot.
- I-beam weight per meter is measured in kg/m. Convert by multiplying lb/ft by 1.4881 to get kg/m. So the W10x33 above is 49.1 kg/m.
Common I Beam Weight Chart (AISC W-Shapes, Carbon Steel)
| Size | Weight per Foot | Weight per Meter | Depth | Flange Width |
|---|---|---|---|---|
| W6x12 | 12 lb/ft | 17.9 kg/m | 6.03" | 4.00" |
| W8x18 | 18 lb/ft | 26.8 kg/m | 8.14" | 5.25" |
| W10x22 | 22 lb/ft | 32.7 kg/m | 10.17" | 5.75" |
| W10x33 | 33 lb/ft | 49.1 kg/m | 9.73" | 7.96" |
| W12x26 | 26 lb/ft | 38.7 kg/m | 12.22" | 6.49" |
| W14x30 | 30 lb/ft | 44.6 kg/m | 13.84" | 6.73" |
| W16x36 | 36 lb/ft | 53.6 kg/m | 15.86" | 6.99" |
| W18x50 | 50 lb/ft | 74.4 kg/m | 17.99" | 7.50" |
This i beam weight chart matches the AISC Manual 15th edition. For an i-beam weight chart in kg, multiply the per-foot value by 1.4881 and divide by 1 meter (shown in the kg/m column). An i-beam weight chart in kg pdf straight from mills or an i beam weight chart pdf is handy for procurement, but you can always back into the numbers from the formula below.
Formula Behind the I-Beam Weight per Meter
Weight per foot = Cross-section area (in²) x 12 in/ft x 0.2836 lb/in³
Cross-section area = (2 x flange width x flange thickness) + (web height x web thickness)
Where web height = overall depth - 2 x flange thickness.
Example: W10x33 Verification
- Depth d = 9.73 in, flange width bf = 7.96 in, flange thickness tf = 0.435 in, web thickness tw = 0.29 in
- Web height = 9.73 - (2 x 0.435) = 8.86 in
- Cross-section area = (2 x 7.96 x 0.435) + (8.86 x 0.29) = 6.92 + 2.57 = 9.49 in²
- Weight per foot = 9.49 x 12 x 0.2836 = 32.3 lb/ft (AISC published value: 33 lb/ft, within 2% of the ideal section)
200x100 I Beam Weight (IS 808 / ISMB 200)
A standard 200x100 i beam weight in India (ISMB 200) has flange width 100 mm, flange thickness 10.8 mm, web thickness 5.7 mm, depth 200 mm, and weighs about 25.4 kg/m or 17.1 lb/ft. Plug these into the calculator to verify.
MS I Beam Weight Calculator
This calculator works as an ms i beam weight calculator for Indian and British sections when you enter depth and flange dimensions in mm and switch to the mm/m units. The formula is the same regardless of regional naming.
Steel I Beam Weight Chart in Kg PDF
Commercial steel i beam weight chart in kg pdf documents come from Tata Steel, JSW, and SAIL. They list ISMB, ISJB, ISLB, and ISWB sections. This calculator reproduces those numbers within 2%, the same tolerance the mill uses.