Energy Cost Check Independent guidance for U.S. households

Appliance Cost Calculator

Estimate what one appliance costs to run each month.

This tool is for the question most bill guides skip: what does one device actually cost? Use it when a portable AC, space heater, dehumidifier, old fridge, or entertainment setup feels suspicious.

U.S.-only directional tool. This calculator uses appliance wattage, runtime, and your electricity rate to estimate cost. It is useful for appliance decisions, not utility plan shopping.

Last updated April 7, 2026
Source direction U.S. residential electricity framing and DOE guidance
Best use Check one suspected appliance before replacing it

Tip: if you do not know the wattage, check the product label, manual, or use a plug-in energy monitor for a better real-world number.

Good uses for this page

Use it to compare “keep using it” versus “replace it,” or to check whether one high-runtime device is responsible for more of the bill than expected.

How To Use It

Use appliance math to find the expensive outliers.

Portable AC and space heaters

These often look affordable to buy but expensive to run. This calculator helps separate purchase price from operating cost.

Dehumidifiers and extra fridges

These are classic “silent bill growers” because they run for long hours without attracting much attention.

Entertainment and office setups

One device may be minor, but clusters of always-on equipment can add up. Use the result to decide whether measurement is worth it.

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