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Variable Speed Pump Energy Savings Calculator
Estimate energy savings from fitting a variable speed drive to a pump using the affinity laws.
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Estimate energy savings from fitting a variable speed drive to a pump using the affinity laws.
Variable Speed Pump Energy Savings Estimator
Enter your numbers below for an instant estimate.
0
π‘ Tip: Power scales with speed cubed: P = P0 x (N / N0)^3.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Variable Quick Guide
Typical values for reference.
| kW | Speed % | Hours | Saving |
|---|---|---|---|
| 15 | 100 | 6000 | Β£0.00 |
| 15 | 90 | 6000 | Β£6,829.20 |
| 15 | 75 | 6000 | Β£14,568.75 |
| 15 | 60 | 6000 | Β£19,756.80 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Variable Speed Pump Calculator FAQ
Answers to common questions about this calculator.
Pump power falls with the cube of speed.
Flow scales with speed, head with speed squared and power with speed cubed.
No, they depend on system static head.
Often 1 to 3 years for large pumps.