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Both calculators run independently β change the inputs on either side to compare results.
Civil
Water Pipe Flow Calculator
Calculate flow rate in a pressurized water pipe using the Hazen-Williams equation. Used by plumbing and civil engineers to size distribution mains, evaluate pump systems, and check hydraulic capacity.
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
| Water Pipe Flow Calculator | Pipe Flow Capacity Calculator | |
|---|---|---|
| Category | Civil | Civil |
| Inputs required | 4 | 4 |
| Result | Flow Rate (gpm) | Flow Capacity (gallons per minute) |
| What it does | Calculate flow rate in a pressurized water pipe using the Hazen-Williams equation. Used by plumbing and civil engineers to size distribution mains, evaluate pump systems, and check hydraulic capacity. | 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. |