Introduction
The I Beam Weight Calculator tells you how much a steel I-beam weighs. Pick a standard profile like IPE, HW, HM, HN, HP, or a hot rolled I-beam, then enter the length. You can also type your own sizes: height (H), flange width (B), web thickness (t₁), flange thickness (t₂), and fillet radius (r).
The tool shows the total weight in kilograms, pounds, metric tons, and grams. It also gives you the weight per meter, the cross-sectional area, and the section perimeter. You can change the material too, from mild steel to aluminum, copper, brass, and more.
You get a scaled drawing of the beam cross-section, a step-by-step math solution, and charts that split the weight between the web, the flanges, and the fillets. Use it to plan steel orders, check shipping loads, guess crane lifts, or price a job before you buy.
How to use our I Beam Weight Calculator
Pick a standard beam or type your own beam sizes, add the length and material, and the calculator gives you the total weight in kg, lbs, tons, and grams, plus the weight per meter, cross-section area, perimeter, a scaled diagram, and the full math.
Standard Profile Lookup or Custom Manual Input: Use the top tabs. Choose "Standard Profile Lookup" to use a catalog beam size. Choose "Custom Manual Input" to type your own I beam dimensions.
Beam Category: Pick the beam family you are using, like IPE, H-beam (HW, HM, HN, HP), ordinary hot rolled, or light duty. This changes the list of profiles below it.
Profile / Specification: Pick the exact beam size. Each option shows the real height, flange width, web thickness, flange thickness, and fillet radius in mm.
Height (H): In custom mode, type the total depth of the beam from the top flange to the bottom flange. Pick mm, cm, m, in, or ft.
Flange Width (B): Type how wide the top and bottom flanges are, and pick the unit.
Web Thickness (t₁): Type how thick the upright middle plate (the web) is. It must be smaller than the flange width.
Flange Thickness (t₂): Type how thick each flange plate is. Two flanges together must be smaller than the height.
Fillet / Root Radius (r): Type the curved corner size where the web meets the flange. Leave it as 0 for a plain welded beam.
Length (L): Type how long one beam is and pick mm, cm, m, in, or ft.
Material (density): Pick the metal, such as mild steel, stainless steel, or aluminum. The density in kg/m³ is used to work out the weight.
Number of Pieces: Type how many beams of this same size you need. The total weight is multiplied by this number.
Show dimensions in: Pick the unit used for the labels on the cross-section diagram and the read-only size boxes.
Chart weight unit: Pick kg, lbs, t, or g for the weight breakdown chart and the material comparison chart.
Calculate and Reset: Results update as you type, but you can press Calculate to refresh them. Press Reset to go back to the starting values.
I Beam Weight: What It Is and Why It Matters
An I beam is a steel bar shaped like the letter I. It has two flat plates called flanges (top and bottom) and a thin upright part in the middle called the web. This shape is strong but uses less steel than a solid block, so builders use I beams for floors, roofs, bridges, and frames.
The Parts of an I Beam
- Height (H): how tall the beam is from the top flange to the bottom flange.
- Flange width (B): how wide the top and bottom plates are.
- Web thickness (t₁): how thick the middle upright part is.
- Flange thickness (t₂): how thick each flat plate is.
- Fillet radius (r): the small curved corner where the web meets each flange. Rolled beams have this curve, so it adds a bit of extra steel.
How I Beam Weight Is Found
Weight comes from three things: the shape of the cut end (the cross-sectional area), the length, and the density of the metal.
Area = H × t₁ + 2 × B × t₂ − 2 × t₁ × t₂ + (4 − π) × r²
The first part is the web, the second part is both flanges, and the third part is taken away so the spot where the web and flange meet is not counted twice. The last part adds the small fillet corners.
Weight = Area × Length × Density
Mild steel has a density of about 7850 kg/m³. So a beam with an area of 0.0028 m², a length of 6 m, and steel density gives about 132 kg. The same area figure feeds into stiffness checks like the section modulus.
Weight Per Meter
Steel sellers often list beams by weight per meter (kg/m) or weight per foot (lb/ft). This number stays the same no matter how long the beam is, so it is an easy way to compare sizes. Multiply it by the length to get the full weight.
Common Beam Types
IPE beams are the European standard sizes. H-beams come in HW (wide flange), HM (medium flange), HN (narrow flange), and HP (steel piles) series. Ordinary and light hot rolled I-beams are common in Asia. Each type has set dimensions listed in steel tables, so you only need the name and length to get the weight.
Why Beam Weight Is Useful
- Cost: steel is sold by weight, so weight sets the price.
- Shipping: trucks and cranes have weight limits.
- Design: the beam's own weight is a load the structure must hold, so it belongs in your beam deflection checks.
- Painting: the perimeter tells you how much surface needs coating or fireproofing.
- Connections: heavier sections need bigger bolts.
Different Metals, Different Weight
The same beam shape weighs very different amounts in other metals. Aluminum is about one third the weight of steel. Lead is much heavier. Only the density changes in the math. The shape stays the same.