Pump Energy Cost Calculator
Annual kWh and cost of running a pump from shaft power, motor efficiency and schedule.
Over a 15-year life, energy is ~90% of a pump's total cost of ownership โ purchase price is the cheap part.
Formula
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates โ verify with a qualified professional before making decisions. Read the full disclaimer.
Pump Energy Cost Calculator is a free pump running cost for pump engineers, plumbers and plant designers โ instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Pump Energy Cost Calculator
Annual kWh and cost of running a pump from shaft power, motor efficiency and schedule. The calculation implements kWh = (P_shaft/ฮท_motor)ยทhours; cost = kWh ร tariff (Hydraulic Institute / Europump โ Pump Life Cycle Costs). Over a 15-year life, energy is ~90% of a pump's total cost of ownership โ purchase price is the cheap part.
How to use Pump Energy Cost Calculator
- 1Enter Shaft power at duty in kW.
- 2Enter Motor efficiency in %.
- 3Enter Running hours/day in h.
- 4Enter Days/year.
- 5Read Annual energy, Annual cost instantly โ no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Pump Energy Cost Calculator?
- โImplements the standard formula โ kWh = (P_shaft/ฮท_motor)ยทhours; cost = kWh ร tariff
- โReference cited on-page: Hydraulic Institute / Europump โ Pump Life Cycle Costs
- โOne-click SI โ Imperial toggle โ values convert in place, physics stays in SI
- โLive worked example: the substitution recomputes from your numbers
- โRuns entirely in your browser โ nothing uploaded, free forever
Frequently asked questions
What formula does the Pump Energy Cost Calculator use?+
It computes kWh = (P_shaft/ฮท_motor)ยทhours; cost = kWh ร tariff, per Hydraulic Institute / Europump โ Pump Life Cycle Costs. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Over a 15-year life, energy is ~90% of a pump's total cost of ownership โ purchase price is the cheap part.
Can I use this for pump selection?+
Use it to establish the duty (flow, head, NPSH, power) and then pick a pump whose curve passes through that point near best efficiency. The tool gives you the engineering numbers a supplier will ask for.
Is the Pump Energy Cost Calculator free to use?+
Yes โ completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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