What is a UPN channel section?

UPN is a standard European channel profile with tapered inner flange faces; the parallel-flange counterpart is UPE. Sizes run from UPN 30 to UPN 400 and are designated by nominal web height in millimetres.

What formula is used for C-channel cross-section area?

Area = t × (H + 2F − 2t), where H is the web height, F is the flange width, and t is the wall thickness. This avoids double-counting the flange-web corner material. Weight = Area × Length × Density.

What density is used for wrought iron?

Wrought iron uses 7750 kg/m³. Carbon (mild) steel uses 7850 kg/m³, which is the standard per EN 1993. Cast iron has a lower density of approximately 7200 kg/m³ due to its graphite microstructure.

How does the UPN standard size selector work?

Selecting a UPN size from the dropdown automatically fills the web height, flange width, and wall thickness fields with the nominal dimensions from the DIN 1026 / EN 10279 table. You can still edit the values if your stock has different tolerances.

Can I calculate for multiple bars at once?

Yes. Enter the quantity in the Quantity field. The result shows the total weight for all bars as well as the per-bar weight for reference.

Why might my result differ from the steel catalogue?

The standard presets use published nominal catalogue mass. A custom uniform-thickness calculation omits flange taper and fillet radii, while real products also vary within rolling tolerances, so a custom result can differ from a mill certificate.

Iron Channel Weight Calculator

Select a standard UPN/U-channel size or enter custom dimensions, specify length and quantity, and get the total iron channel weight in kg and lbs instantly.

Channel Dimensions

Standard UPN Size

Selecting a size auto-fills the fields below.

Web Height (H)

Vertical back wall of the C-section.

Flange Width (F)

Horizontal projecting lip (top and bottom flanges).

Wall Thickness (t)

Uniform thickness of web and both flanges.

Bar Length

Material

Quantity (bars)

Formula Reference

Area = t × (H + 2F − 2t)
Weight = Area × Length × ρ

Where H = web height (m), F = flange width (m), t = wall thickness (m), L = length (m), ρ = density (kg/m³).

C-Section Diagram

Select a UPN size or enter dimensions, then click Calculate.

Iron & Steel Densities

Material	kg/m³	lb/in³
Wrought Iron	7750	0.280
Carbon Steel	7850	0.284
Stainless 304	7930	0.286
Stainless 316	8000	0.289
Cast Iron	7200	0.260
Ductile Iron	7700	0.278

UPN Standard Sizes (EN 10279 / DIN 1026)

Size	H mm	F mm	t mm	kg/m

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Summary

Select a standard UPN/U-channel size or enter custom dimensions, specify length and quantity, and get the total iron channel weight in kg and lbs instantly.

How it works

Choose a standard UPN size from the dropdown to auto-fill dimensions, or select "Custom" to enter them manually.
Verify or adjust the web height (H), flange width (F), and wall thickness (t).
Enter the bar length and select the unit (meters, feet, mm, or inches).
Select the material — wrought iron, carbon steel, cast iron, or a custom density.
Enter the quantity of bars if calculating for a batch order.
Click Calculate to get the total weight in kg and lb, plus the linear weight per meter and per foot.

Use cases

Estimating iron channel weight for structural frames and support brackets.
Calculating freight and shipping weight for UPN section orders.
Preparing a bill of materials for fabrication and steel stockholders.
Comparing UPN sizes to find the lightest section meeting load requirements.
Verifying theoretical weight against supplier certificates or mill data.
Checking rigging and crane lift limits before hoisting channel bundles.
Academic structural-engineering calculations involving UPN profiles.
Quick cost estimation when iron channel is priced by weight.

Frequently Asked Questions

Last updated: 2026-09-19 · Reviewed by Nham Vu