Sump Pump Running Cost Calculator
Estimate sump-pump operating hours, electricity use and cost from pump wattage, cycle duration, daily cycle count and seasonal operating months.
Default project preview
$1.82
Monthly cycles
540
Monthly runtime
13.5 hours
Average daily duty
1.88%
Annual operating energy
81 kWh
Calculator
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Input and output guide
What each value means
The labels and units below are part of this calculator’s visible methodology. Replace every default with measurements or product data from the actual project.
Pump input power
Enter this project assumption in W. The current imperial default is 750 W.
Runtime per cycle
Enter this project assumption in min. The current imperial default is 1.5 min.
Average cycles per day
Enter this project assumption in a unitless value. The current imperial default is 18. Minimum: 0.
Operating days per month
Enter this project assumption in days. The current imperial default is 30 days. Minimum: 1. Maximum: 31.
Operating months per year
Enter this project assumption in months. The current imperial default is 8 months. Minimum: 1. Maximum: 12.
Electricity price
Enter this project assumption in per kWh. The current imperial default is 0.18 per kWh. Minimum: 0.
How to read the outputs
Monthly cycles
18 per day. Default preview: 540.
Monthly runtime
1.5 minutes per cycle. Default preview: 13.5 hours.
Average daily duty
share of each day running. Default preview: 1.88%.
Annual operating energy
8 operating months. Default preview: 81 kWh.
Annual electricity cost
entered energy rate. Default preview: $14.58.
Cost per 1,000 cycles
same cycle duration. Default preview: $3.38.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Operating hours = cycles × minutes per cycle ÷ 60. Energy = pump kW × operating hours; cost = energy × electricity rate.
Reviewed project guidance
How to use this estimate in a real project
Last reviewed: July 30, 2026
Use the Sump Pump Running Cost Calculator to estimate a planning quantity from verified pump wattage, cycle runtime, cycle frequency and tariff. It supports scope comparison, purchasing and operating-cost planning, but it does not select equipment, approve code compliance or replace project-specific design.
Calculation steps
- 1Measure or obtain each design input from the actual project and keep one consistent unit system.
- 2Enter pump wattage, cycle runtime, cycle frequency and tariff using product data or approved design information rather than generic nominal values.
- 3Review the unrounded engineering or usage result before applying allowances, duty cycle, efficiency or tariff assumptions.
- 4Apply each adjustment once, then round only the final purchasing, equipment-count or scheduling output.
Worked numerical example
A 700 W sump pump running a total of 45 minutes per day uses about 0.525 kWh; at $0.20/kWh that is roughly $0.11 per day.
Purchasing and rounding
Use measured or rated electrical input and realistic accumulated runtime. Pump purchase decisions should be based on required flow at head and reliability, not on energy cost alone.
Interpret the result
The result converts pump runtime to electricity cost. Wet-weather cycling can vary dramatically, and startup, backup systems and battery charging may add consumption.
Page-specific assumptions
- Inputs describe the actual connected system or measured project scope.
- One operating condition, product rating and unit system are used per calculation.
- Allowances and efficiency losses are not already embedded in the entered values.
- Code, health, structural, electrical and hydraulic requirements are verified independently.
Common mistakes
- Using nominal equipment ratings instead of delivered performance at design conditions.
- Mixing instantaneous flow or power with daily or annual energy.
- Applying the same allowance more than once.
- Treating a quantity or cost estimate as equipment selection or professional approval.
Primary and technical references
BuildMeter provides planning estimates, not engineering, architectural, electrical, mechanical, plumbing, permit or code approval. Review the methodology and verify final decisions with product documentation and qualified professionals.
Related tools
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Understand the measurements and assumptions
Use these visible reference guides before changing project inputs or planning allowances.
FAQ
Sump Pump Running Cost Calculator questions
Why can sump-pump energy vary so much?+
Water inflow, basin size, pump capacity, discharge head and check-valve behavior change cycle frequency and duration.
Does this include backup-pump charging?+
No. Add charger or battery-maintenance energy separately.
Can frequent cycling indicate a problem?+
It can indicate a small basin, short discharge loop, check-valve issue or high inflow and should be evaluated.