./prontouso.com

FINANCE & BUDGETING

Electricity Cost Calculator

Enter appliance power, quantity, hours per day, days used, and your kWh tariff to estimate daily, period, and monthly electricity costs locally.

Tool statusRuns in your browser
Preview

Appliances

Combined total

Daily consumption
9.6 kWh
Period consumption
288 kWh
Daily cost
$9.12
Total cost
$273.60
Monthly estimate
288 kWh
Monthly estimate
$273.60

Appliance breakdown

Appliance namePeriod consumptionTotal cost
Air conditioner288 kWh$273.60

Totals update as you edit each appliance.

How it works

  1. Enter your input

    Fill in the values, paste your text, or upload the file this tool works with.

  2. See results instantly

    Most tools update live as you type; a few use a single button. Either way, the result appears right on this page.

  3. Use your results

    Copy, download, or share what the tool produces — you're always in control of the output.

Privacy and processing — Runs locally in your browser. This tool does not upload your input.

What is Electricity Cost Calculator?

Enter appliance power, daily usage, billing period, quantity, and tariff to estimate kWh consumption and cost for one or more devices.

UNDERSTAND THE TOOL

How to estimate electricity cost

How it is calculated

Power is converted to kilowatts, multiplied by the number of appliances and hours used per day, then multiplied by days and the tariff per kWh.

Formula
kWh = kW * quantity * hours per day * days

Multiple appliances

Each appliance is calculated separately and then added to the combined total, so you can compare one device with the whole period estimate.

Common uses

  • Estimate the cost of an air conditioner, heater, computer, or appliance.
  • Compare several devices before changing usage habits.
  • Forecast a partial period or a 30-day monthly estimate.

Worked example

Daily use
daily_kWh = (watts / 1000) * quantity * hours_per_day
Period cost
cost = daily_kWh * days * tariff_per_kWh

Two 100 W lamps for 5 hours

At 0.25 per kWh over 30 days, the lamps use 30 kWh and cost 7.50 for the period.

0.1 kW * 2 * 5 * 30 * 0.25 = 7.50

Appliance estimate notes

Appliance names, wattage, hours, and tariff values stay in the page while you estimate. The result assumes steady usage and a fixed kWh tariff.

Frequently Asked Questions

What tariff should I enter?

Use the price you pay per kWh from your electricity bill, including taxes or fees if you want a closer estimate.

Can I add more than one appliance?

Yes. Add as many rows as needed and the tool calculates both individual and combined totals.

Is the monthly cost exact?

It is an estimate based on 30 days at the same daily usage and tariff.

Why does the tool show a monthly estimate?

Monthly kWh and cost use the same daily usage multiplied by 30, so you can compare appliances even when the custom period is shorter or longer.

Related Tools