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
Pipe Flow Velocity Calculator
Calculates the average flow velocity of fluid in a circular pipe given a volumetric flow rate and pipe diameter. Use it when sizing pumps, checking design velocities, or troubleshooting pipe systems.
Fill in the required fields to see your result.
Key differences
| Stormwater Runoff Calculator | Pipe Flow Velocity Calculator | |
|---|---|---|
| Category | Civil | Civil |
| Inputs required | 3 | 2 |
| Result | Peak Runoff Rate (cubic feet per second) | Flow Velocity (m/s) |
| 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. | Calculates the average flow velocity of fluid in a circular pipe given a volumetric flow rate and pipe diameter. Use it when sizing pumps, checking design velocities, or troubleshooting pipe systems. |