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.