Compare calculators
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
Darcy-Weisbach Pressure Loss Calculator
Compute friction pressure loss in a pipe using the Darcy-Weisbach equation, the rigorous standard for all Newtonian fluids and flow regimes. Useful for pump sizing, pipe sizing decisions, and verifying pressure budgets in process and HVAC systems.
Fill in the required fields to see your result.
Key differences
| Pump Power and Efficiency Calculator | Darcy-Weisbach Pressure Loss Calculator | |
|---|---|---|
| Category | Fluid Mechanics | Fluid Mechanics |
| Inputs required | 4 | 4 |
| Result | Required Power (kW) | Pressure Loss per Unit Density (m²/s²) |
| 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. | Compute friction pressure loss in a pipe using the Darcy-Weisbach equation, the rigorous standard for all Newtonian fluids and flow regimes. Useful for pump sizing, pipe sizing decisions, and verifying pressure budgets in process and HVAC systems. |