Electricity Consumption Calculator

Daily, monthly and yearly kWh and cost of appliances.

Instant · runs in your browser
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About the Electricity Consumption Calculator

List your appliances, such as fans, lights, AC, fridge, iron and water pump, with their wattage and daily hours of use. The calculator shows units (kWh) per day, month and year and the estimated cost.

Formula

kWh = watts × hours ÷ 1,000. A 1.5-ton inverter AC drawing about 1,200 W for 8 hours uses roughly 9.6 units a day.

Tip

The biggest savings usually come from ACs, geysers and old fridges.

How to use Electricity Consumption Calculator

  1. Enter your values. Units and defaults are shown beside each field.
  2. Press Calculate (results also update as you type once calculated).
  3. Read the result and the step-by-step breakdown with the formula used.
  4. Copy the result or reset to start again.

Frequently asked questions

How accurate is this calculator?

Calculations use the standard formulas shown on the page, computed in full precision and rounded only for display. The result is only as accurate as the inputs and assumptions listed.

Can I use this for engineering design?

No. These are rough quantity estimates using the assumptions shown (wastage, densities, mix ratios). Get structural and electrical work designed and approved by a qualified engineer.

Is it free?

Yes. All tools are free to use without an account.