Microwave Wattage Converter

Your details

The wattage stated on the food packaging or in the recipe (commonly 800 W or 1000 W).
W
Whole minutes from the label. Use 0 if the time is under one minute.
min
Additional seconds beyond the minutes above.
s
Check the label inside the door, the back panel, or your manual. Common home microwaves run from 600 W to 1200 W.
W
If you are cooking on less than full power (e.g. 70% to defrost), enter that percentage here. Leave at 100 for full power.
%
Adjusted cooking time
3 min 45 s

How long to cook in your microwave to deliver the same total energy as the recipe.

Effective wattage800W
Total energy delivered50Wh
Time multiplier1.25
1.25 x
Much shorter<0.7Shorter0.7-0.9Same0.9-1.1Longer1.1-1.4Much longer1.4+

Cook for 3 min 45 s at full power (your effective output: 800 W).

  • Your effective wattage (800 W) is lower than the recipe (1000 W), so you need more time: multiply any time on this label by 1.25.
  • Check the food more frequently near the end, because microwave ovens heat unevenly and hot spots can develop.
  • Cooking times are a guide. Dense, tall, or irregularly shaped food may need stirring or turning halfway through to ensure even heating.

Next stepSet your timer to 3 min 45 s. Let the food rest for 1 minute after cooking so residual heat finishes the job.

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