DIY Cost Tools
Sump Pump Electricity Cost Calculator
Estimate energy use and electricity cost from pump wattage, cycle duration, cycles per day and utility rate.
How to use this calculator
- Replace every example value with your own measurements, label values or planning assumptions.
- Keep each value in the unit printed beside its field.
- Select Calculate, then compare the result with the formula and limitations below.
Formula and method
Daily kWh = watts ÷ 1,000 × minutes per cycle ÷ 60 × cycles per day. Monthly values use 365 ÷ 12 days; cost = kWh × utility rate.
Results are hidden whenever an input changes or validation fails, so an older answer cannot be mistaken for the current calculation.
Worked example
Pump power = 1000 W; Minutes per cycle = 1.5 min; Cycles per day = 12 cycles; Electricity rate = 0.16 $/kWh. The calculator returns Monthly energy = 9.13 kWh; Monthly cost = 1.46; Annual cost = 17.52.
The worked example uses the same default values displayed in the calculator.
Limitations and safety
Frequently asked questions
What should I enter first?
Start with measurements or rates from the project, product label, service quote or equipment specification. Replace every example value before relying on the estimate.
Why can the real result differ?
Starting surge, battery backup losses, changing groundwater and pump efficiency can alter real use. A sump system is flood-protection equipment; follow manufacturer instructions and use a qualified electrician or plumber where required.
Does the calculator round purchases up?
Only outputs labeled as whole packages, vents, heaters, pails or similar counts are rounded up. Keep extra precision for planning and follow supplier packaging.
Review notes and reference
Reviewed October 5, 2026. The formula was independently checked against the displayed default example, and the calculator was tested for valid defaults, empty input, invalid formats, range boundaries and recovery. Reference: NIST SI Units. Explanations and examples are original.