Where do the weights come from?

The weight per foot is the listed theoretical weight from the AISC Steel Construction Manual shapes database. For wide-flange shapes the second number in the name is the weight, so a W12X26 weighs 26 lb/ft.

Are connection plates and bolts included?

No. The listed weight is the bare rolled section only. Add an allowance for connection plates, bolts, stiffeners, paint, and any fireproofing when estimating shipped weight and erection loads.

How is freight tonnage calculated?

Total pounds are divided by 2000 for US short tons and the kilogram total is divided by 1000 for metric tonnes. Use these to plan truckloads and crane picks, remembering trucks are usually capped near 20 to 24 tons of payload.

Does it handle metric sections?

It shows kg/m and kilogram totals alongside the imperial figures so you can quote in either system, but the section list itself uses imperial AISC designations common in North America.

How accurate is the result?

Listed mill weights are accurate to within rolling tolerance, typically a couple of percent. For exact certified weights, request a mill test report for the specific heat of steel you receive.

Structural Steel Beam Weight Calculator

Knowing the weight of a steel order drives crane selection, truck loads, and the price you pay by the ton. This calculator multiplies the published weight per foot of any standard AISC section by your piece length and quantity to give the total order weight and freight tonnage.

How it works

Every rolled section has a listed weight in pounds per foot. The math is direct:

piece weight (lb) = weight_per_ft × length_ft
total weight (lb) = piece weight × quantity
tons              = total weight / 2000

For wide-flange shapes the weight is literally in the name — W12X26 is a 12-inch-deep beam weighing 26 lb/ft. The tool also converts to kg/m using the factor 1 lb/ft = 1.48816 kg/m so you can quote in metric.

Example and tips

Ten 30-foot W21X62 beams weigh 62 × 30 × 10 = 18,600 lb, just over 9 US tons — a single legal truckload. When planning picks, remember the listed weight is bare steel: connection material, paint, and fireproofing can add several percent. Always order a few percent of mill tolerance and confirm certified weights from the mill test report for critical lifts.