Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Civil
Road Gradient Calculator
Calculates the gradient of a road or ramp as a percentage from the vertical rise and horizontal distance. Use it when designing roads, ramps, drainage channels, or checking accessibility compliance.
Fill in the required fields to see your result.
Civil
Manhole Volume Calculator
Calculates the volume of concrete required to construct a circular manhole wall given the outer diameter, inner diameter, and height. Use it when estimating materials for sewer, drainage, or utility access structures.
Fill in the required fields to see your result.
Key differences
| Road Gradient Calculator | Manhole Volume Calculator | |
|---|---|---|
| Category | Civil | Civil |
| Inputs required | 2 | 3 |
| Result | Road Gradient (%) | Concrete Volume (m³) |
| What it does | Calculates the gradient of a road or ramp as a percentage from the vertical rise and horizontal distance. Use it when designing roads, ramps, drainage channels, or checking accessibility compliance. | Calculates the volume of concrete required to construct a circular manhole wall given the outer diameter, inner diameter, and height. Use it when estimating materials for sewer, drainage, or utility access structures. |