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Both calculators run independently — change the inputs on either side to compare results.
Fluid Mechanics
Pump Power and Efficiency Calculator
Calculates the shaft power a pump must deliver to move fluid against a given head, accounting for pump efficiency. Used when selecting pumps for water supply, irrigation, HVAC, and industrial process systems.
Fill in the required fields to see your result.
Fluid Mechanics
Hazen-Williams Flow Rate Calculator
Calculate water flow rate in pressurised pipes using the Hazen-Williams equation given pipe diameter, hydraulic gradient, and C factor. Widely used by civil engineers for water main and irrigation system design.
Fill in the required fields to see your result.
Key differences
| Pump Power and Efficiency Calculator | Hazen-Williams Flow Rate Calculator | |
|---|---|---|
| Category | Fluid Mechanics | Fluid Mechanics |
| Inputs required | 4 | 3 |
| Result | Required Power (kW) | Flow Rate (m³/s) |
| What it does | Calculates the shaft power a pump must deliver to move fluid against a given head, accounting for pump efficiency. Used when selecting pumps for water supply, irrigation, HVAC, and industrial process systems. | Calculate water flow rate in pressurised pipes using the Hazen-Williams equation given pipe diameter, hydraulic gradient, and C factor. Widely used by civil engineers for water main and irrigation system design. |