Microwave Time Converter (Adjust for Your Wattage)

What this tool does

A microwave delivers energy at a steady rate, so cooking needs roughly the same energy whatever the oven: time × power stays constant. A meal given 3 minutes at 800 W needs about 3 min 26 s in a 700 W oven, and less in a stronger one. The method works best for small differences in power; it ignores that ovens heat unevenly and that food keeps cooking while it stands, so check the food a little early and stir if you can. Use the cooking (output) power in the manual or on the door label, not the higher electricity rating.

Formula

new time = time on the pack × pack watts ÷ your watts

Variables

Worked example

Limitations

• The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.
• Coverage and consumption figures vary between products. Take the values from the manufacturer's datasheet for the product you are actually using.