Estimate your electricity cost: pick a preset or type the wattage, set hours per day, and see daily and monthly kWh plus monthly and yearly cost at your tariff.
All calculations happen locally in your browser. Your devices, habits and tariff never leave your device.
| Device | Watts | Hours/day | Days/month | kWh/month | Cost/month |
|---|
Presets are typical averages, not nameplate labels: the 150 W fridge figure already accounts for the compressor cycling around a third of the time. Override any preset with your own wattage.
The currency selector only changes the display symbol — no exchange-rate conversion is applied. To convert an amount, use the currency converter..
Estimates only — not a billing-grade calculation. Real bills add fixed charges, taxes and rate tiers.
Electricity billing has one core unit: the kilowatt-hour — 1,000 watts running for one hour. Everything here follows from that single definition, device by device, then summed.
Because a bill is not just energy × price. Most utilities add fixed monthly charges, taxes and regulatory fees, sometimes tiered rates that get more expensive as you consume more, and for some tariffs demand or peak charges. The device total here covers only the kWh these specific appliances draw — compare trends, not totals, against your statement.
Those are real: televisions, consoles, microwaves with clocks and chargers left in sockets keep drawing a trickle, typically a few watts each, which for one device is cents a month but across a whole household standby can plausibly reach 5–10% of electricity use. This tool models devices while they are doing their job; add standby as a small extra or as its own 1–5 W row if you want to see it explicitly.
In daylight hours, yes — but the honest arithmetic depends on your tariff's export rate, panel cost and roof, and how much of your consumption actually overlaps with sunshine. A night-shift air conditioner is offset differently than a washing machine run at noon. Use this tool to get your monthly kWh first; that number, not the bill, is what a solar quote should be sized against.
They are typical averages for common devices, not guarantees: a '150 W' fridge is what the cycling compressor draws on average over a day, not the 800+ W it pulls while running, and a '1200 W' AC assumes real duty, not nameplate. If your device's label or manual gives you a better number, override the preset — that is what the custom watt field is for. Estimates only, not billing-grade figures.
No. Every row, kWh figure and cost is computed locally in your browser with plain JavaScript. Your devices, habits and tariff never leave your device, and there is no account and no network request attached to a calculation.
If you just finished with Electricity Cost, the natural next steps are Inflation Calculator, ROI Calculator, Discount Calculator, or browse every tool in Cross-border Finance.