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Both calculators run independently — change the inputs on either side to compare results.
Civil
Culvert Flow Capacity Calculator
Estimate the full-flow discharge capacity of a circular culvert using Manning's equation. Used by civil engineers and hydrologists to size culverts for road crossings, drainage channels, and stormwater systems.
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
| Culvert Flow Capacity Calculator | Pipe Flow Velocity Calculator | |
|---|---|---|
| Category | Civil | Civil |
| Inputs required | 3 | 2 |
| Result | Flow Capacity (cfs) | Flow Velocity (m/s) |
| What it does | Estimate the full-flow discharge capacity of a circular culvert using Manning's equation. Used by civil engineers and hydrologists to size culverts for road crossings, drainage channels, and stormwater systems. | 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. |