Know what the outlet costs

Turn watts into dollars.

A plain-English electricity cost calculator for renters and homeowners. Use your utility rate, see the real monthly cost, then decide what is worth changing.

No signupRuns in your browserU.S. rate presets
Electricity cost calculator

What does it cost to run?

Estimated running cost
$44.50
per 30-day month
Per day$1.48
Per year$541.40
Energy used270 kWh/mo
At this usage, cutting one hour per day saves about $90 a year.
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Useful before you buy, repair, or replace.

Short guides built around actual household decisions, not recycled energy-saving slogans.

01

Space heater cost by state

Compare the same heater in California, Texas, Florida, and beyond.

↗02

Window AC vs. central air

Estimate the break-even point for cooling one room or the whole house.

↗03

How much does standby power cost?

Measure the quiet drain from televisions, consoles, and office gear.

↗04

Read the electricity rate on your bill

Find the all-in cents-per-kWh number without utility jargon.

↗
Method, not magic

Simple math. Sources shown.

The calculator multiplies watts by daily use, converts to kilowatt-hours, then applies your electricity rate. Nothing is sent to a server.

1

RatesPrototype presets are based on U.S. Energy Information Administration residential averages. Production should refresh from the EIA API.

2

Formula(Watts ÷ 1,000) × hours per day × days × price per kWh.

3

LimitsTaxes, tiers, fuel adjustments, and time-of-use rates can change the actual bill.