Electrical and Engineering
Pump Power Calculator
Pump Power Calculator calculate hydraulic water horsepower, required brake horsepower, kilowatts, and hydraulic efficiency loss from flow, head, specific gravity, and efficiency.
Electrical and Engineering
Pump Power Calculator
Calculate hydraulic water horsepower, required brake horsepower, kilowatts, and hydraulic efficiency loss from flow, head, specific gravity, and efficiency.
Formula
Water horsepower = flow(gpm) x head(ft) x specific gravity / 3960; brake hp = water hp / efficiency.
About the Pump Power Calculator
Calculate hydraulic water horsepower, required brake horsepower, kilowatts, and hydraulic efficiency loss from flow, head, specific gravity, and efficiency. This tool keeps the requested measurements separate and applies the named method instead of substituting an unrelated general estimate.
How the Pump Power Calculator Works
The US customary pump relationship converts flow and total dynamic head into hydraulic power before entered pump efficiency determines shaft demand.
Formula
Water horsepower = flow(gpm) x head(ft) x specific gravity / 3960; brake hp = water hp / efficiency.
The calculation runs in your browser. Values are validated for required ranges, compatible units, and method-specific restrictions before results are displayed.
Required Inputs
- Flow rate (required) - enter in US gpm.
- Total dynamic head (required) - enter in ft.
- Fluid specific gravity (required).
- Pump efficiency (required) - enter in %.
Results Reported
The result panel reports the final answer and the intermediate quantities needed to check the calculation:
- Hydraulic water horsepower (hp)
- Required brake horsepower (hp)
- Required shaft power (kW)
- Hydraulic power (kW)
- Pump power loss (kW)
Pump Power Calculator Example
Select Example Data in the calculator to load this reproducible input set:
| Input | Example value |
|---|---|
| Flow rate | 500 US gpm |
| Total dynamic head | 120 ft |
| Fluid specific gravity | 1 |
| Pump efficiency | 75 % |
How to Use the Calculator
- Confirm that the calculator title and formula match the quantity you need.
- Enter every required value using the unit shown with its field.
- Select Example Data to inspect a valid input set, or enter your own values and select Calculate.
- Review all reported values and the displayed formula before using the answer.
- Use Copy Result or Download CSV when you need a reusable record.
Accuracy and Limitations
Use total dynamic head at operating flow. Motor and drive efficiency, pump curve, viscosity, suction conditions, cavitation, and service factor require separate checks.
Keep units consistent, use measurements that represent the actual situation, retain full precision during the calculation, and round only the final answer. Professional decisions may require current official rules, field measurements, laboratory methods, or specialist review.
Frequently Asked Questions
What does the Pump Power Calculator calculate?
Calculate hydraulic water horsepower, required brake horsepower, kilowatts, and hydraulic efficiency loss from flow, head, specific gravity, and efficiency.
Which formula does the Pump Power Calculator use?
Water horsepower = flow(gpm) x head(ft) x specific gravity / 3960; brake hp = water hp / efficiency. The US customary pump relationship converts flow and total dynamic head into hydraulic power before entered pump efficiency determines shaft demand.
How should I use the Pump Power Calculator result?
Use total dynamic head at operating flow. Motor and drive efficiency, pump curve, viscosity, suction conditions, cavitation, and service factor require separate checks.