Electricity Cost Calculator

Wondering why your electricity bill is high, or whether an old appliance is worth replacing? Electricity Cost turns a power rating and your usage into what an appliance actually costs to run.

WHAT IT DOES
Enter the wattage from the label, how long the appliance runs each day, and your price per kWh. Get the cost per day, per month and per year, plus the energy it uses — instantly, offline, with no account. Not sure of your rate? Work it out from a recent bill.

Works for anything that plugs in: a heater, an air conditioner, a dehumidifier, a fridge that runs all the time, a PC, a TV, an EV charger, a single light.

BUILT TO STAY OUT OF YOUR WAY
Open it, type, read the answer. No sign-up, no ads, nothing to dismiss. The running-cost calculator is complete and free for everyone.

YOUR FIGURES STAY ON YOUR PHONE
Every calculation runs on the device and nothing is sent anywhere. No analytics of ours, no crash reporter, no server. Saved calculations are kept off cloud backup and device-to-device transfer on purpose. There is no account.

DETAILS
• Prices and numbers formatted for your country's conventions
• Any currency, or the one your device implies
• Watts or kilowatts, whichever the label uses
• Dark theme, readable at large accessibility font sizes
• English and Portuguese, switchable inside the app
• Saved calculations reopen exactly as you left them

ELECTRICITY COST PRO
A one-time purchase, no subscription. Compare two appliances side by side: the difference per month, per year and over five years, and — if you enter what a replacement costs — how long it takes to pay for itself. The running-cost calculator stays free in full; Pro adds the comparison.

ABOUT THE ESTIMATES
Electricity Cost does arithmetic on the numbers you enter. Real bills depend on your actual usage, your tariff structure, standing charges and taxes. Monthly and yearly figures scale the daily cost to an average month and year — they are estimates for comparing options, not a prediction of your bill.