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Appliance Energy Cost Calculator

Estimate how much an appliance costs to run each month and year.

Updated April 11, 2026
Free online tool
Planning and research use

Why this page exists

Appliances can seem inexpensive one day at a time while still adding up across the month. This calculator turns wattage, daily use, electric rate, and monthly usage days into a quick energy-cost estimate so homeowners and renters can compare appliances or usage habits with clearer numbers.

Interactive tool

Run the estimate

Enter your numbers and read the result first, then use the sections below to understand what affects the outcome.

Calculator

Appliance energy cost calculator

Estimate monthly electricity use and operating cost for an appliance from wattage, usage time, and electric rate.

Preparing the interactive calculator and result tools...

Planning note

Last updated April 11, 2026. Use this tool to compare scenarios and plan ahead, then confirm important details with the lender, employer, insurer, contractor, or other qualified provider involved in the final decision.

How it works

What the calculator is doing

Enter the appliance wattage, hours used per day, electric rate, and days used per month.

The calculator converts watt-hours into kilowatt-hours for the month.

It then multiplies energy use by the electricity rate to estimate monthly and yearly operating cost.

Understanding your result

The monthly cost is often the easiest number to compare with the household budget, while the yearly cost helps when deciding whether a higher-efficiency appliance may be worth the difference.

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Examples

Ways people use this tool

Example scenarios help turn a quick estimate into a more useful comparison or planning step.

Compare two appliances

Run each appliance with the same electric rate and usage pattern to see which one costs more to operate.

Check a space heater or dehumidifier

Use the wattage and daily run time to see how a high-draw appliance changes the monthly bill.

Test lighter usage

Reduce daily hours or days per month to see how much cost control comes from changing usage habits.

FAQ

Common questions

What is a kilowatt-hour?

A kilowatt-hour measures electricity use over time. This calculator converts appliance wattage and usage hours into kilowatt-hours so cost can be estimated from the electric rate.

Why is yearly cost helpful?

A small daily cost can still become noticeable over a year, which makes yearly cost useful when comparing appliances or deciding whether usage changes matter.

Will the real bill match exactly?

Not always. Appliance cycling, efficiency, electricity tiers, and local utility billing rules can move the real total up or down.

Related tools

Keep comparing

Use these related tools to compare nearby scenarios, check a second estimate, or keep narrowing down the right decision.

Home ToolsUpdated April 11, 2026