Does voltage (110 V vs 220 V) change electricity cost?

No. A 1000-watt appliance uses 1 kWh per hour in any country, because watts already account for voltage. Voltage only matters for converting an amp rating into watts.

Why is my real bill higher than the calculated cost?

Slab tariffs, fixed monthly charges, meter rent, seasonal duties and standby power all add to bills. Using your effective rate (bill total divided by units) captures most of these automatically.

Electricity Cost Calculator

See what any appliance really costs to run — per day, per month, per year — in your own currency, with your own tariff.

By Jamal, EasyCalcHub · Last updated July 2026

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Appliance (sets a typical wattage — you can edit it)

Power (watts)

Hours used per day

Your electricity rate — price per unit (kWh), in your currency

per day

3.75 per hour of use · 210 per week · 913 per month · 10,950 per year

0.6 kWh (units) per day · 18.3 kWh per month

This calculator assumes there are 30.44 days in a month and 365 days in a year on average, and that the appliance runs at its full rated power (100% capacity).

Note: these are estimated results. Electricity rates vary by country, region, provider and usage slab, and they change over time. Taxes, duties and surcharges on your bill are not included unless the rate you enter already includes them. Results assume the appliance draws its full rated power (100% capacity) — at lower speeds, lighter loads or eco settings, real usage will be lower.

Quick answer

Electricity cost = watts ÷ 1000 × hours used × your price per kWh. Example: a 75-watt ceiling fan running 8 hours a day uses 0.6 kWh daily — at a rate of 50 per unit, that's about 30 per day and roughly 900 per month before taxes. The formula works in every country and currency, because you enter your own rate.

Typical appliance wattages

Typical power draw for common household appliances. Your model's real figure is printed on its label or in its manual — always prefer that. Appliances with thermostats or compressors (fridges, ACs, irons) cycle on and off, so their average use is lower than their peak watts.
Appliance	Typical watts	kWh for 8 h/day
LED bulb	10	0.08
WiFi router	10	0.08
Phone charger	5	0.04
Laptop	60	0.48
Ceiling fan	75	0.6
LED TV (43–55")	100	0.8
Desktop computer	200	1.6
Games console	200	1.6
Refrigerator (average draw)	150	3.6 (24 h)
Gaming PC	400	3.2
Washing machine	500	0.5–1 per load
Water pump (1 HP)	750	0.75 per hour
Vacuum cleaner	800	0.8 per hour
Microwave	1,200	0.2 per 10 min
Electric iron	1,200	1.2 per hour
Air fryer	1,500	0.75 per 30 min
Space heater	1,500	12
Hair dryer	1,500	0.25 per 10 min
Window AC (1 ton)	1,200	9.6
Split AC (1.5 ton)	1,800	14.4
Electric kettle	2,000	0.1 per boil
Electric oven	2,200	2.2 per hour
Water heater / geyser	3,000	3 per hour
EV home charger	7,000	7 per hour

How the calculation works

Formula: cost = (watts ÷ 1000) × hours of use × price per kWh. Watts ÷ 1000 converts to kilowatts; kilowatts × hours gives kWh — the "units" on your bill.

Worked example: a 1,500-watt space heater used 6 hours a day consumes 1.5 × 6 = 9 kWh daily. At a rate of 60 per unit, that's 540 per day and roughly 16,200 per month. The same appliance at a rate of 0.17 (in dollars) costs about $1.53 per day. Same math, any currency.

Why this works in every country

Watts and kilowatt-hours are universal — the entire world's meters bill in kWh. Currencies, taxes and tariffs differ, so instead of guessing them, this calculator uses the one number that already contains them all: your own effective rate. Divide your bill's total by its units and every tax and fee is automatically included.

110 V vs 220 V — does voltage change the cost?

No. A 1,000-watt appliance consumes 1 kWh per hour whether your country uses 110 V or 220 V — watts already account for voltage (watts = volts × amps). Voltage only matters if your appliance's label shows amps instead of watts: multiply amps by your mains voltage to get watts, which the "Label shows amps" mode does for you.

Slab / tiered tariffs

Many countries (including Pakistan and India) charge in slabs — the more units you use in a month, the higher the rate for the extra units. For a single appliance, the most realistic choice is your highest slab rate, since an extra appliance's units land on top of your existing usage. Your bill lists the slab rates.

Appliances that switch themselves on and off

Fridges, air conditioners, irons and water heaters cycle: they draw full power only part of the time once they reach temperature. Their average consumption is therefore lower than their nameplate watts — often a third to a half. Inverter ACs and fridges are gentler still. Speed and load settings matter too: the label shows the maximum draw, so a fan on low speed, an AC set to a milder temperature, or a half-loaded washing machine all consume noticeably less than their rated watts. Treat results for these appliances as upper estimates, or use a plug-in energy meter for an exact reading.

Example electricity rates around the world

Purely as illustrations (residential averages, early 2026 — rates change often and vary by region and usage slab): United States ≈ $0.17 per kWh, United Kingdom ≈ £0.26, Germany ≈ €0.39, India ≈ ₹6–9, Pakistan ≈ Rs. 40–65 depending on slab, Australia ≈ A$0.33. Always use the rate from your own bill — it's the only number that's truly yours.

Frequently asked questions

How do I calculate the electricity cost of an appliance?

Divide the appliance's watts by 1000, multiply by the hours you use it, then multiply by your price per kWh. Example: 100 W TV × 5 hours = 0.5 kWh; at 50 per unit, that's 25 per day.

Where do I find my price per kWh?

On your electricity bill — it lists the rate per unit (kWh). Note that bills usually add taxes, duties and fixed charges on top of the unit rate, so the final bill is higher than units × rate. If you want those included in the estimate, you can divide your bill's total by its units and enter that instead.

Where do I find an appliance's wattage?

On a label or plate on the appliance itself (often near the plug or on the back/bottom), in its manual, or on the manufacturer's website. If the label shows only amps, multiply amps × your mains voltage (about 230 V in Pakistan, India, UK and EU; about 120 V in the US).

Does a fridge really run 24 hours a day?

It's plugged in 24 hours, but the compressor cycles on and off, typically running a third to half the time. That's why this calculator's fridge preset uses an average draw rather than the peak nameplate watts.

Why is my real bill higher than the calculator says?

Common reasons: slab tariffs (extra units cost more), fixed monthly charges and meter rents that exist regardless of usage, seasonal duties, and appliances drawing standby power. Using your effective rate (bill total ÷ units) captures most of these automatically.

What uses the most electricity in a home?

Heating and cooling dominate almost everywhere: air conditioners, space heaters and water heaters/geysers are usually the top three, followed by fridges (because they run all day) and cooking appliances.

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Disclaimer: Results are estimates for general information only, provided "as is" and without warranty. Actual costs vary with real appliance wattage, duty cycles, slab/tiered tariffs, fixed charges, taxes and seasonal fees, so your bill may differ. This is not financial or billing advice — verify against your utility's official tariff. Example rates above are illustrative averages for early 2026 and change over time. See our full Disclaimer.

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