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 coffee machine use?
Measure kWh for the same number of drinks. Replace example inputs with your own usage pattern.
0.30 kWhper day of use
1.80 €per month at 0.20 €/kWh
Worked example
1200 W × 0.25 h/day × 100 % load factor × 30 days.
9.00 kWh/month · 21.60 €/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 |
|---|---|
| Pod / compact | 900–1,500 W |
| Espresso machine | 1,200–1,700 W |
| Bean-to-cup / larger | 1,300–1,900 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
- Switch off long keep-warm periods if you do not need them.
- Descale as recommended so heating remains efficient.
- Count real heating minutes rather than leaving the rated wattage active all day.
Compare more appliances
Return to the appliance library or use the general electricity calculator for any device.
NEXT STEP
Keep exploring
What usually matters more than the rated wattage
Coffee machines can have a high electrical rating but run the heater for short periods. The monthly result therefore depends more on warm-up time, number of drinks, keep-warm behaviour, automatic rinsing and standby time than on wattage alone.
Separate active use from standby
A useful estimate treats brewing and standby as two different loads. If your machine switches itself off quickly, standby may be small. If it keeps a boiler, hot plate or internal system warm for hours, that background use can become a larger share of the total.
Use your real routine
Count how many coffees are made on a normal day and time the warm-up period instead of assuming the heater runs continuously. For a more detailed estimate, use the coffee machine calculator. You can also compare the result with the general electricity calculator.
If you are pricing usage in Spain, use the current electricity price rather than a generic tariff assumption.
Editorial review: 11 Oct 2026. Electricity cost excludes coffee, water, cleaning products and maintenance.
BRICODATO · PRACTICAL CHECK
Check the real energy use of your coffee machine
A powerful heater may be active only briefly. Separate start-up heating, drink preparation and any hot-plate or keep-warm time. Leaving a machine heated for an hour is a different use case from making two coffees and allowing its auto-off function to work.
Checklist to reproduce the comparison
- Measure kWh for the same number of drinks.
- Record warm-up time separately from idle heated time.
- Check whether auto-off and keep-warm functions affect the session.
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.