Compare calculators
Both calculators run independently β 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
Culvert Design Calculator
Size a circular or box culvert to pass a design stormwater discharge using Manning's equation. Essential for highway engineers, drainage designers, and land developers ensuring roads stay clear during storm events.
Fill in the required fields to see your result.
Key differences
| Road Gradient Calculator | Culvert Design Calculator | |
|---|---|---|
| Category | Civil | Civil |
| Inputs required | 2 | 5 |
| Result | Road Gradient (%) | Required Culvert Diameter (m) |
| 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. | Size a circular or box culvert to pass a design stormwater discharge using Manning's equation. Essential for highway engineers, drainage designers, and land developers ensuring roads stay clear during storm events. |