Microwave Oven Power Levels

Did you know that when you adjust the power level of a microwave oven you are actually adjusting the amount of time that the oven is cooking rather than the actual power ? The power output cannot be adjusted. This is achieved by a simple reduction in the actual cooking time in relation to the cooking time selected by the user. For instance. 100% power means that the oven is cooking all the time it is running. If 50% power is chosen, the oven will switch on and off during the cook time so that the total time it was actually cooking was only 50% of the cooking time selected. The same applied for all powers.

Power level selector

Power level selector

It has always been accepted between the manufacturers that to defrost frozen food in a microwave the optimum results will be achieved at 30% power. To that end the defrost setting is usually 30%. Most ovens have a range of settings that are loosely based around this. High = 100%, Medium high = 75%, Medium = 50%, Medium low = 30% and Low or simmer = 10%.

I wanted to clarify this aspect as there is some information in a future post about inconsistency of microwave power which I am working on which is is very relevant.


About microwaveexpert

The Microwave Service Company is based in Sellindge, Kent and provides repairs to Domestic and Commercial Microwave Ovens including 24 volt Samsung Roadmate microwaves.
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