Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Civil
Stormwater Runoff Calculator
Compute peak stormwater runoff flow rate in cubic feet per second using the Rational Method (Q = CiA). Used by engineers to size drainage infrastructure like storm sewers, channels, and detention basins.
Fill in the required fields to see your result.
Civil
Earthwork Volume Calculator
Compute the volume of soil to be cut or filled between two cross-sections on a construction site using the average end area method. Essential for road, railway, and site grading quantity take-offs.
Fill in the required fields to see your result.
Key differences
| Stormwater Runoff Calculator | Earthwork Volume Calculator | |
|---|---|---|
| Category | Civil | Civil |
| Inputs required | 3 | 5 |
| Result | Peak Runoff Rate (cubic feet per second) | Total Earthwork Volume (m³) |
| What it does | Compute peak stormwater runoff flow rate in cubic feet per second using the Rational Method (Q = CiA). Used by engineers to size drainage infrastructure like storm sewers, channels, and detention basins. | Compute the volume of soil to be cut or filled between two cross-sections on a construction site using the average end area method. Essential for road, railway, and site grading quantity take-offs. |