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 an electric oven use?
Include preheat in the measured cooking session. Replace example inputs with your own usage pattern.
1.16 kWhper day of use
6.93 €per month at 0.20 €/kWh
Worked example
2200 W × 0.75 h/day × 70 % load factor × 30 days.
34.65 kWh/month · 83.16 €/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 |
|---|---|
| Compact oven | 1,500–2,000 W |
| Typical built-in oven | 2,000–3,000 W |
| High-power functions | 3,000–3,600+ W |
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
- Avoid unnecessary preheating.
- Cook several items together when practical.
- The thermostat cycles, so measured energy can be below the maximum rating.
Compare more appliances
Return to the appliance library or use the general electricity calculator for any device.
NEXT STEP
Keep exploring
How to interpret oven electricity use
An oven does not normally draw its full rated power continuously. The heating elements cycle on and off once the cavity reaches temperature, so the real result depends on preheating, cooking temperature, duration, food load and the programme selected.
Use the label as a starting point, not the final answer
The rated wattage is useful for an upper-bound estimate. For a more realistic monthly figure, use your normal cooking time and, where possible, compare the estimate with measured energy over several cooking sessions. A single short test can be misleading if it includes a cold start or an unusually long preheat.
Compare complete cooking jobs
When comparing appliances, compare the energy used to finish the same task rather than watts alone. A lower-power appliance that runs much longer is not automatically cheaper. See air fryer vs oven and microwave vs oven for task-based comparisons.
For your own figures, use the electricity consumption calculator and, if you are in Spain, check the current electricity price.
Editorial review: 11 Oct 2026. Figures are estimates and should be checked against the appliance label or manufacturer data.
BRICODATO · PRACTICAL CHECK
Check the real energy use of your electric oven
An oven's heater cycles after preheating. Count electricity for the entire cooking task, including preheat, and note whether several trays share one session. High instantaneous power does not mean the heater runs continuously at that draw.
Checklist to reproduce the comparison
- Include preheat in the measured cooking session.
- Record set temperature, programme and number of trays.
- Compare like-for-like recipes before judging an appliance.
The figures elsewhere on this page are illustrative assumptions, not a measured average for every model. Use the label, your actual cycle count and safely collected kWh readings.