Electricity cost calculator
What this appliance costs per day, month and year.
- Instant
- Free
- Private (processed locally)
- No sign-up
Put a price on every socket
The electricity bill is a black box: you pay the total without knowing which appliance costs what. Three inputs suffice, watts, hours per day, kWh price, to get the real cost per day, month and year, and decide with full knowledge.
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Start from a preset
Fridge, TV, PC, air conditioner, LED bulb, heater : or enter your own appliance.
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Adjust the usage
Real hours per day and your kWh rate (on your bill).
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Compare
The annual cost reveals the true gluttons : often surprising ones.
Typical annual costs (at $0.25/kWh)
| Appliance | Profile | Cost / year |
|---|---|---|
| LED bulb 10 W | 5 h/day | ≈ $4.60 |
| TV 100 W | 4 h/day | ≈ $37 |
| Refrigerator 150 W | 8 h equiv./day | ≈ $110 |
| Desktop PC 250 W | 8 h/day | ≈ $183 |
| Air conditioner 1,500 W | 6 h/day (summer) | ≈ $205 (3 months) |
| Heater 2,000 W | 5 h/day (winter) | ≈ $305 (4 months) |
Mind standby too: 10 devices idling at 2 W each is ~175 kWh a year, about $44 for… nothing. A switched power strip cuts them off in one gesture.
Frequently asked questions
How do I convert watts into money?
Energy (kWh) = power (W) × hours ÷ 1,000, then cost = kWh × kWh price. A 2,000 W heater running 5 h uses 10 kWh: at $0.25/kWh, that is $2.50 per day, $76 per month of heating.
Where do I find my appliance’s power?
On the label or rating plate (in W or kW), in the manual, or via a plug-in power meter ($10-15) that measures real consumption : the best option for variable-draw appliances like refrigerators.
Why does the fridge preset not use 24 h?
Its compressor runs in cycles: plugged in 24/7, it actually consumes the equivalent of only 6 to 10 h at full power. The 8 h preset reflects that reality.
Which appliances cost the most?
Anything that heats or cools: electric heating, water heater, air conditioner, dryer, oven. A single 2,000 W heater used through winter costs more than a whole house of LED lighting over the entire year.