Watts to kWh
kWh = (W ÷ 1,000) × hours × load factor. Multiply kWh by your electricity price to estimate energy cost.
♨️ Worked example
How much electricity does a induction hob use?
Start with a transparent example, then replace the assumptions with your own wattage, operating time and electricity price.
1.26 kWhper day of use
7.56 €per month at 0.20 €/kWh
Worked example
1800 W × 1 h/day × 70 % load factor × 30 days.
37.80 kWh/month · 90.72 €/year
This is an energy-only estimate. Your bill can also include standing charges, taxes and other household consumption.
Typical reference range
Use the label, manual or manufacturer data for your exact model whenever possible.
| Type or situation | Indicative reference |
|---|---|
| Gentle cooking / small zone | 500–1,200 W average |
| Typical cooking | 1,200–2,000 W average |
| Boost / several zones | 2,000–7,000+ W instantaneous |
What changes the result?
Rated watts are only one part of the calculation.
Measure when possible
Thermostats, compressors, inverter control and programmes can make real consumption lower or higher than a simple maximum-power estimate.
Practical checks
- Match pan size to the cooking zone.
- Use lids when practical.
- Do not confuse total connected load with average energy use.
Compare more appliances
Return to the appliance library or use the general electricity calculator for any device.
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