Electricity Cost Calculator

Adjust the calculator values below

Rated power per device 1,000 W
Equivalent active time per use day 2 hours
Energy per use day 2 kWh
Weekly energy 14 kWh
Billing-period energy 60 kWh
Cost per use day $0.30
Weekly cost $2.10
Billing-period cost $9.00
Estimated annual cost $109.50
$9.00 per 30-day billing period
Recurring electricity estimate 1 kW for 2 hours every day at $0.15 per kWh
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Electricity Cost Calculator

Use this electricity cost with device power draw, use per day, and days used per week to get fast results, understand the formula behind the...

How recurring electricity cost is calculated

Convert the device power to kilowatts and daily use to hours. Energy per use day equals kilowatts multiplied by daily hours and the active duty-cycle fraction, then multiplied by identical devices. Weekly energy uses the entered days per week. Billing-period and annual estimates scale that weekly schedule across calendar days before multiplying kilowatt-hours by the electricity price.

Use a representative weekly schedule

Enter the number of days the device is normally used in a seven-day week. The billing-period estimate uses the weekly average, so it can handle equipment used only on selected days while keeping a 30-day or custom utility period.

What the estimate does and does not include

The result estimates one flat energy charge for the entered appliance schedule. Nameplate power may differ from measured draw, and real bills may include standby use, taxes, fixed fees, demand charges, time-of-use pricing, tiers, minimum charges, and seasonal schedule changes.

Frequently asked questions

Common questions about recurring appliance schedules, watts, kilowatt-hours, duty cycle, billing periods, and electricity tariffs.

How is recurring electricity cost calculated?

Convert power to kilowatts, multiply by equivalent active hours per use day, identical devices, and days used per week, then scale the weekly average to the billing period. Multiply the resulting kilowatt-hours by the entered price per kWh.

Why are watts and kilowatt-hours different?

Watts and kilowatts measure the rate of power use. Kilowatt-hours measure energy accumulated over time. One kilowatt used continuously for one hour equals one kilowatt-hour.

What should I enter for days used per week?

Enter a representative number from zero to seven. The calculator averages that weekly schedule across the selected billing-period length, so five means the device is normally used on five days in each seven-day week.

How should I use the duty cycle?

Use 100% when the device draws the entered power throughout its scheduled daily use. Enter a lower measured or representative percentage for thermostatic, compressor-driven, or variable equipment that cycles during that time.

Does the result match my entire utility bill?

No. It estimates the selected devices at one flat energy rate. Fixed fees, taxes, demand charges, tiers, time-of-use rates, standby consumption, and other household loads can make the bill different.

When should I use the single-use calculator instead?

Use the single-use calculator for one isolated session or event. Use this recurring calculator when the device follows a daily or weekly schedule and you want weekly, billing-period, or annual cost.