How Many Watts Does a Space Heater Use?

Answer
1,500 W typical (750–1,500 W)

A space heater uses about 1,500 watts while running. At a typical 6 hours a day that is 270.0 kWh per month, or about $45.90 at $0.17/kWh. Almost every plug-in heater tops out at 1,500 W, the limit for a 15 A outlet.

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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

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    Space Heater power use at a glance

    Value
    Typical running watts1,500 W
    Range750–1,500 W
    Current at 120 V12.5 A
    Typical use6 h per day
    Energy per day9.00 kWh
    Energy per month270.0 kWh
    Cost per month ($0.17/kWh)$45.90
    Cost per year$559

    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 space heater on a generator?

    Yes. Choose a generator whose running watts exceed 1,500 W.

    How many amps does a space heater draw?

    About 12.5 A at 120 V.

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