Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
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.
Civil
Pipe Flow Capacity Calculator
Determine water flow rate (in GPM) through circular pipes using Manning's equation. Used by civil engineers and plumbers to size pipes for gravity-fed drainage, sewer, and stormwater systems.
Fill in the required fields to see your result.
Key differences
| Pipe Flow Velocity Calculator | Pipe Flow Capacity Calculator | |
|---|---|---|
| Category | Civil | Civil |
| Inputs required | 2 | 4 |
| Result | Flow Velocity (m/s) | Flow Capacity (gallons per minute) |
| What it does | 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. | Determine water flow rate (in GPM) through circular pipes using Manning's equation. Used by civil engineers and plumbers to size pipes for gravity-fed drainage, sewer, and stormwater systems. |