How Many Watts Does a Sump Pump Use?

Answer
800 W typical (500–1,000 W)

A sump pump uses about 800 watts while running. At a typical 1 hour a day that is 24.0 kWh per month, or about $4.08 at $0.17/kWh. A 1/3 HP pump runs about 800 W and needs 2–3× that to start.

Free, no sign-upInstant resultsUpdated October 2026
W
h
days
$/kWh
Monthly cost
–
How we calculated this

    For estimating and educational purposes only. Results are approximate and are not a substitute for a licensed professional, the manufacturer's instructions or your local code. Disclaimer

    More questions like this

    RefrigeratorFreezerMicrowaveElectric OvenDishwasherWashing MachineClothes DryerTVDesktop ComputerLaptopWindow Air ConditionerCentral Air ConditionerSpace HeaterElectric Water HeaterHair DryerCoffee MakerCeiling FanLED Light BulbDehumidifierPool PumpGaming ConsoleAll quick answers

    Sump Pump power use at a glance

    Value
    Typical running watts800 W
    Range500–1,000 W
    Current at 120 V6.7 A
    Typical use1 h per day
    Energy per day0.80 kWh
    Energy per month24.0 kWh
    Cost per month ($0.17/kWh)$4.08
    Cost per year$50

    Check the label on your appliance for its exact rating. The calculator above uses your own watts, hours and electricity rate.

    Frequently asked questions

    Can I run a sump pump on a generator?

    Yes. Choose a generator whose running watts exceed 800 W and whose starting watts cover the motor surge.

    How many amps does a sump pump draw?

    About 6.7 A at 120 V.

    Open the full calculator: Electricity Cost Calculator →