Concrete channel material.
Measure the rectangular outside section and the contained trapezoidal open void.
Read the right quantitative data
Supplied cross-section dimensions and actual concrete yield.
Check this ordering assumption
The outside envelope includes the void and overstates concrete material.
Channel flow capacity, slopes, structure and drainage design are outside this estimate.
A worked quantity method
This illustrative set of supplied inputs demonstrates Concrete Channel Material Volume Calculator. Replace the example measurements and product figures with your own before ordering.
| Supplied input | Metric display | US display |
|---|---|---|
| Your material allowance | 0 % | 0 % |
| Uniform channel segment 1: Segment length | 10 m | 32.81 ft |
| Uniform channel segment 1: Outer width | 0.6 m | 1.97 ft |
| Uniform channel segment 1: Outer height | 0.4 m | 1.31 ft |
| Uniform channel segment 1: Inside void top width | 0.4 m | 1.31 ft |
| Uniform channel segment 1: Inside void bottom width | 0.2 m | 0.66 ft |
| Uniform channel segment 1: Inside void depth | 0.3 m | 0.98 ft |
| Uniform channel segment 1: Identical components | 1 | 1 |
Concrete channel order volume: 1.5 m³
- Net concrete material volume
- 1.5 m³
Uniform rectangular outer section with a contained trapezoidal void. Shared intersections must be excluded from segment lengths. No flow capacity is calculated.
Open this example in the full calculatorYour measurement and product-data sheet
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Measure the rectangular outside section and the contained trapezoidal open void.
Supplied cross-section dimensions and actual concrete yield.
The outside envelope includes the void and overstates concrete material.
Input for Concrete Channel Material Volume Calculator. Record the value with its unit and quantity basis.
Input for Concrete Channel Material Volume Calculator. Record the value with its unit and quantity basis.
Input for Concrete Channel Material Volume Calculator. Record the value with its unit and quantity basis.
Input for Concrete Channel Material Volume Calculator. Record the value with its unit and quantity basis.
Input for Concrete Channel Material Volume Calculator. Record the value with its unit and quantity basis.
Input for Concrete Channel Material Volume Calculator. Record the value with its unit and quantity basis.
Input for Concrete Channel Material Volume Calculator. Record the value with its unit and quantity basis.
Input for Concrete Channel Material Volume Calculator. Record the value with its unit and quantity basis.
Choose your next calculation
Concrete Channel Material Volume Calculator
Subtract a measured trapezoidal open void from a rectangular concrete channel section. Geometry only; drainage capacity and channel design are not calculated.
Concrete Bag Calculator
Turn a concrete volume into whole bags using the yield printed on your chosen product.
Turn the estimate into an order
- Confirm that all quantities use the same measured basis and the selected product's current data.
- Keep different products, finishes and handed variants in separate purchase lines.
- Review exact demand and whole-pack purchase quantities before entering your quoted prices.
- Record compatible stock already on hand, then save the remaining order in your browser project.
Measurement and purchase guides
Other materials in this family
Reviewed 6 October 2026. Geometry and purchase arithmetic use your measurements and selected specifications. Calculation scope.