Global calculator · Energy bills & appliances

Global Appliance Electricity Cost Calculator

Find the electricity used by one kettle boil, an hour of heating, or a month of daily appliance use. Choose single use or a daily routine, match W or kW to the label, and enter the time. The tool shows Wh and kWh even before you know your electricity rate. For example, a 2 kW appliance running for 6 minutes at full power uses 0.2 kWh; multiply that by your own rate to get its energy cost. Fixed bill charges stay separate because a single use usually does not add another fixed charge.

No account Formula visible Your rate and units

Use your evidence

What to have beside you

Use the current bill or tariff sheet, exact product label, location-specific solar estimate, or measured project dimensions. Example physical values teach the tool; zero money rates prevent an unsourced price from becoming a default claim.

USUSA GBUK AUAustralia AEUAE CACanada EUEU NZNew Zealand SGSingapore

Enter your details

Your values

Every input includes a simple explanation.

Simple wordsFormula shownPrivate inputs

Simple viewUsing editable example assumptions for technical settings.

What are you estimating?User-entered value — example shownChoose a daily routine for a billing period, or the cost of using an appliance just once.

Label or measured powerManufacturer-specific value — example shownThe electrical power printed on the appliance label, or its measured average power.

Power unitUser-entered value — example shownChoose watts or kilowatts to match the appliance label. One kilowatt equals 1,000 watts.

Helpful tip: Match your label. Changing this selector does not convert the number above.Number of appliancesUser-entered value — example shownHow many identical appliances, elements, fans, or slabs you want to include.

items

Use per dayUser-entered value — example shownThe number of hours represented by the field label in this calculator, such as daily use or desired backup time.

hours

Days in periodUser-entered value — example shownThe number of days represented by the field label in this calculator, such as monthly use or battery autonomy.

days

Your energy rateUser-entered value — example shownThe price you pay for one kilowatt-hour of electricity. Copy it from your own bill or tariff sheet.

USD/kWh

Helpful tip: Copy the rate for energy use from your bill. Leave zero until you have it.Fixed charges to includeUser-entered value — example shownCharges that do not change with the number of kilowatt-hours used, such as a standing or service charge.

USD

Helpful tip: Usually leave 0 for a single use. Do not add the full monthly fixed charge to every appliance.CurrencyUser-entered value — example shownThe currency used on your bill or quote. It changes the symbol, not the formula.

Helpful tip: Choose the currency printed on your bill or quote. No exchange-rate conversion is performed.

Private: calculations run in your browser; a saved scenario stays on this device.

Your result

Estimated period cost

$0.00

Energy use is calculated without a tariff. Enter your own electricity rate to estimate cost; zero is a placeholder, not free electricity.

Energy used15 kWh

Watt-hours15,000 Wh

Energy charge$0.00

Entered fixed charges$0.00

How this was calculated

Formula used

Convert kW to W by multiplying by 1,000 and minutes to hours by dividing by 60. Total hours = single-use hours, or hours/day × days. Energy = watts × quantity × total hours × operating factor ÷ 1,000. Total cost = energy × entered rate + entered fixed charges.

Your values in the formula

Power: 100 W = 100 W. Time: 5 h/day × 30 days = 150 h. Energy = 100 W × 1 × 150 h × 1 ÷ 1,000 = 15 kWh. Cost = 15 kWh × $0.00 + $0.00 fixed = $0.00.

Assumptions and rounding

The entered rate is a user value, not a GharGanit tariff claim.
Operating factor 1 means the appliance draws the entered power throughout its runtime.
Power and time unit selectors interpret your entered number; they do not automatically convert it when changed.

The result reflects the values entered. Cycling, standby, taxes, delivery, fixed fees and tiered or time-of-use pricing can change the final bill.

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Put your whole home in one viewWhich appliances use the most electricity?Add your devices, compare their kWh and save a private home-energy worksheet.

What the result means

Use it as a scenario

The result reflects the values entered. Cycling, standby, taxes, delivery, fixed fees and tiered or time-of-use pricing can change the final bill.

A 100 W device used for 5 hours a day over 30 days uses 15 kWh before fixed charges. Enter your bill's rate to price that energy.

What can change

Check before deciding

01Rated watts can differ from measured average power.
02Fixed, tiered and time-based charges must be considered separately.

Formula and context sources

Verify this calculation

Source links establish context or measurement relationships. Your personal rate and project values remain your inputs.

USAbills

Electricity prices and rates explained

U.S. Energy Information Administration

Explains why an average price statistic is not necessarily the rate applied to the next kWh.

Open official resource

UKbills

Understand electricity and gas bills

Ofgem

Official guide to common bill components.

Open official resource

Australiaappliances

Understand the Energy Rating Label

Australian Government

Use label annual energy values rather than guessing from stars.

Open official resource

Singaporeappliances

Mandatory Energy Labelling Scheme

National Environment Agency

Official appliance-label scheme and covered products.

Open official resource

Continue the decision

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Written and maintained by Tilock SadhukhanReviewed 6 September 2026Version 1.1