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Appliance Energy Cost Calculator

Estimate the annual electricity cost of running an appliance based on its wattage and daily usage.

Computed in your browser — nothing you enter is uploaded. Figures are presented for United States against IRC 2024, and every formula is cited under regulatory standards below.

Last verified 2026-08-25 · v1.0.0

Market
Imperial · sales tax

Estimated annual cost

164.25 $/year

Check your inputs

This assumes constant wattage during the runtime entered — appliances with variable-speed motors or standby power draw (like a modern refrigerator or heat pump) use somewhat less on average than their peak nameplate rating suggests.

Daily energy use
3 kWh

At the values currently entered, the estimated annual cost works out to 164 $/year. Confidence is moderate: the method is sound, but real materials and site conditions vary. Figures are shown for United States, where IRC 2024 is the governing residential reference; switch the market above if you are building elsewhere.

Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — confirmed fixes become pinned regression tests.

[Schema Verified] Computed in alignment with American Concrete Institute (ACI 318-19) formulas and International Residential Code (IRC 2024) spatial boundaries.

Regulatory standards & verification citations

  • Annual cost = (wattage / 1000) x hours used per day x 365 x cost per kWh

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Frequently asked questions

Is nameplate wattage the same as actual average power draw?
Not always — nameplate wattage is often the maximum or peak draw. Appliances with compressors, variable-speed motors, or standby modes (fridges, HVAC, some electronics) use less than their peak rating on average, so a 'kill-a-watt' style plug meter gives a more accurate real-world reading.
How do I find my electricity rate if I have tiered or time-of-use pricing?
Use your average effective rate (total electric charges divided by total kWh used) from a recent bill as a reasonable approximation if your plan has complex tiered or time-of-use pricing.
Is this useful for deciding whether to replace an old appliance?
Yes — comparing this estimate for an old, inefficient appliance against a newer ENERGY STAR-rated model's lower wattage can help estimate the payback period on an upgrade.