Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Plumbing
Pipe Flow Rate Calculator
Calculates the volumetric flow rate of water through a pipe in gallons per minute. Use it when sizing pumps, irrigation lines, or plumbing systems where you know pipe diameter and water velocity.
Fill in the required fields to see your result.
Plumbing
Pipe Flow Velocity Calculator
Calculates water velocity (in ft/s) inside a pipe from flow rate and pipe diameter, then checks whether it falls within code-acceptable limits for the selected application. Use it to avoid erosion, noise, or insufficient flow.
Fill in the required fields to see your result.
Key differences
| Pipe Flow Rate Calculator | Pipe Flow Velocity Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Inputs required | 2 | 2 |
| Result | Flow Rate (GPM) | Flow Velocity (ft/s) |
| What it does | Calculates the volumetric flow rate of water through a pipe in gallons per minute. Use it when sizing pumps, irrigation lines, or plumbing systems where you know pipe diameter and water velocity. | Calculates water velocity (in ft/s) inside a pipe from flow rate and pipe diameter, then checks whether it falls within code-acceptable limits for the selected application. Use it to avoid erosion, noise, or insufficient flow. |