Energy and electricity.

Add up appliance power and run time with your own rate to estimate energy use and cost.

INPUT

Appliances & use

Use rated or measured watts for each appliance. Hours are for each day it operates.

Illustrative starting profile

Load profile

These values are editable examples, not household averages or appliance specifications.

Operating schedule

Hours per day × days per weekSeparate weekday and weekend hours

+ Add appliance Reset example

Electricity price

One flat ratePeak and off-peak rates

Electricity rate $/kWh

Enter your energy charge per kWh. The default $0.20 is an example only.

Enter your own energy prices and the estimated percentage of each appliance’s energy used during peak hours. This does not infer usage from the clock or calculate a utility bill.

Peak rate $/kWh

Off-peak rate $/kWh

Compare with Plan B

Use the same schedule and price settings for both plans.

Plan B appliances

Copy Plan A

+ Add Plan B appliance

Save or open your inputs

Files stay on your device. Import replaces both plans and price settings.

Download JSON Download CSV Print / save PDFImport JSON or CSV

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ESTIMATE

Plan A totals

For the appliances entered above, at the price you chose.

Estimated monthly energy cost—

Annual cost —

Connected power: —
Weekly energy: —
Monthly energy: —
Annual energy: —

Connected power is the sum of appliance ratings. It does not predict peak demand or a utility bill.

Plan B compared with A

Plan B annual energy: —
Plan B annual cost: —
Energy difference, B − A: —
Cost difference, B − A: —

Explore a solar + storage scenario

This is only the listed appliances’ electricity; gas fuel savings are excluded. Solar needs whole-house annual electricity. Add missing appliances here or use a bill total in Solar.

Review Plan A in solar Review Plan B in solar

Opens in a new tab so your comparison stays here.

Appliance breakdown.

Bars show each appliance’s share of estimated annual energy. Values are in the table.

Scroll the table sideways for all columns.

Estimated appliance electricity use and cost
Appliance	Connected power	Weekly energy	Annual energy	Annual cost

A simple model,
clear assumptions.

Per appliance: weekly kWh = watts × quantity ÷ 1,000 × weekly operating hours. The basic schedule uses hours per day × days per week; the other schedule uses weekday hours × 5 + weekend hours × 2. Annual kWh = weekly kWh ÷ 7 × 365. Monthly kWh = annual kWh ÷ 12.

Flat cost = kWh × your rate. With two rates, annual cost = peak kWh × peak rate + off-peak kWh × off-peak rate. You enter each appliance’s peak percentage; the calculator does not derive it from time of day. Both plans use the same rate settings, and differences are Plan B minus Plan A.

The model assumes constant power while running and repeats one weekly schedule all year. It excludes standby use, variable power, demand charges, tiered pricing, seasonal schedules, fixed fees, and taxes. Check appliance labels or a power meter and your bill for better inputs. The sample profiles are illustrative and are not sourced appliance averages.

Planning circuits and service loads? Use the home and panel planner to organize rooms, appliances, and a preliminary breaker schedule.

Unit conversion: U.S. Energy Information Administration . Appliance input guidance: U.S. Department of Energy Energy Saver Guide (2022) . Time-variable prices depend on the utility’s program: U.S. Department of Energy .

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