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Electricity Cost Calculator

Estimate monthly electricity use and cost from wattage-based usage or direct monthly kWh.

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

Why this page exists

Electricity cost questions come up both at the appliance level and at the household bill level. This calculator helps visitors estimate monthly electricity use and cost using either wattage-based usage assumptions or a direct monthly kWh amount from a bill or planning estimate.

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

Electricity cost calculator

Estimate electricity use and cost from direct monthly kWh usage or from wattage-based usage assumptions.

Result

$117.00

Estimated monthly and yearly electricity cost based on either a monthly kWh amount or wattage-based usage assumptions.

Estimated monthly cost$117.00

Estimated monthly electricity use650.0 kWh

Estimated yearly cost$1,404.00

Electricity rate$0.180 per kWh

Using 650.0 kWh per month at $0.180 per kWh works out to about $117.00 monthly.
Monthly kWh mode is useful when you want to estimate cost from a bill reading or a fuller household-usage estimate instead of one appliance.
Yearly cost helps when a small monthly utility change needs to be compared with a larger budget or efficiency decision.

This is a planning estimate. Real billing can change with utility tiers, time-of-use pricing, appliance cycling, and seasonal usage shifts.

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

Choose whether you want to estimate from wattage and usage time or from a direct monthly kWh amount.

Enter the electricity rate per kWh along with the usage details for the method you picked.

The calculator estimates monthly electricity use, monthly cost, and yearly cost from that rate and usage level.

Understanding your result

The direct-kWh option makes this tool useful for whole-house or bill-side planning, while the wattage option is helpful when only one device or one usage pattern is being estimated. That broader range is what makes it a different planning tool from a simple single-appliance estimate.

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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.

Estimate a monthly bill from kWh usage

Use a bill reading or a monthly usage estimate to turn kWh into a dollar amount quickly.

Check wattage-based usage

Switch to wattage mode when you want to estimate cost from a device's power draw and usage pattern.

Stress-test a higher utility rate

Increase the per-kWh rate to see how sensitive the monthly cost is to local electric pricing.

FAQ

Common questions

How is this different from the appliance energy cost calculator?

This tool also supports direct monthly kWh input for bill-side or whole-house planning, while the appliance tool stays focused on one appliance's wattage-based usage.

When should I use monthly kWh mode?

Monthly kWh mode is useful when you already know the kWh from a utility bill or you want to estimate the cost of a broader household usage total.

Will the real utility bill match exactly?

Not always. Utility tiers, taxes, fixed fees, and time-of-use pricing can change the real total beyond the basic per-kWh estimate.

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