The calculation, without hidden assumptions
Estimate theoretical mass for a parallel-flange C/U channel from explicit geometry and material density. Keep the ideal geometry result separate from mill or standard published section mass, which should take priority for rolled sections.
How to use this calculator
Enter overall channel height, flange width, web thickness and flange thickness.
Choose metric or imperial dimensions and enter equal-piece length and whole-piece quantity.
Use documented material density for the actual grade/alloy.
Optionally enter procurement allowance, rate/kg, target mass or published kg/m.
For a standard rolled channel, compare the ideal result with the current manufacturer or governing section table before ordering.
Where people use it
- •Estimate custom fabricated parallel-flange channel mass.
- •Plan steel channel transport and procurement quantities.
- •Compare metric and imperial C/U-channel dimensions.
- •Reverse a purchasing target into whole equal-length pieces.
- •Quantify the difference between ideal geometry and supplier-published kg/m.
200 × 75 mm channel, 6 mm web, 10 mm flanges
Ideal area = 2×75×10 + (200−20)×6 = 2,580 mm². At 7,850 kg/m³ this is 20.253 kg/m. A 6 m piece is about 121.52 kg; 10 pieces are about 1,215.18 kg before allowance.
What the result does not assume
- •This geometry models straight rectangular web/flange elements; it does not model root radii, flange taper, bend radii or lips.
- •Standard rolled sections should use the applicable current published section mass for contractual quantities.
- •Do not infer a standard designation from approximate dimensions.
- •Allowance is an explicit purchasing input, not a fabrication or engineering standard.
- •Mass estimation does not establish structural capacity, code compliance or safe working load.
Frequently asked questions
How is C-channel weight calculated?+
For an ideal parallel-flange channel, calculate the two flange rectangles plus the clear web rectangle, then multiply area by density. With area in mm², kg/m = area × 10⁻⁶ × density in kg/m³.
Why can a channel table show a different kg/m?+
Rolled channels can include root radii, flange taper and mill-specific dimensions. Cold-formed profiles can include bend radii or lips. Published mass for the exact section should take priority.
Can I calculate ISMC channel weight?+
You can estimate mass from entered geometry, but for an ISMC designation use the applicable current standard or manufacturer section table rather than treating this ideal model as the standard value.
Does this support pounds per foot?+
Yes. Enter inches and feet if preferred; the result includes both kg/m and lb/ft plus total kilograms and pounds.
Can I calculate aluminum or stainless channel?+
Yes when you enter a documented density for the actual alloy or grade. Geometry alone does not determine material density.
Can it solve how many channels fit a target weight?+
Yes. Enter a target mass and the calculator returns the number of whole entered-length pieces that fit within it.
Semantic next steps
Continue the calculation
These links move to a different input, formula or project stage rather than a keyword variation of this page.
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