GlenCalc

Microwave wattage calculator

Food packaging assumes a particular microwave power. A weaker oven needs longer. The wattage is usually on a label inside the door.

Your answer

Your cooking time4 min 43 s
In seconds283 s
  • Stir or rest food as the package says, and check it is steaming hot all the way through.

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How we worked it out

Updated as you change the numbers.

  1. Time × package watts ÷ your watts = 180 s × 1,100 ÷ 700.

Method and assumptions

Energy delivered is power times time, so to deliver the same energy the time scales with the ratio of the powers. It is a starting point: ovens differ in how evenly they heat.

Questions

How long is 3 minutes at 1100 W in a 700 W microwave?

About 4 minutes 43 seconds.

Sources

Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.

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