How we calculate consumption
We convert minutes to hours and watts to kilowatts, then multiply by days and the electricity price.
W Γ· 1000 Γ (minutes Γ· 60) Γ days Γ β¬/kWh
Input power and output power differ
A microwave marketed as 800 W can draw more than 1,000 W from the socket. Check the rear label or data sheet for electrical input power.
High power is used for a short time
Microwaves use high power, but usually for short periods. When comparing with an oven, cooking time matters as much as rated power.