1. Microwave wattage

Don’t know what your microwave wattage is?
Let us help you figure it out with a simple test.
Follow the steps below to determine what wattage your microwave oven is.
"Time-to-Boil Test"
Measure a cup of water in a 2-cup glass measure. Add ice cubes; stir until water is ice cold. Discard ice cubes and pour out any water more than 1 cup. Set the microwave on high 4 minutes, but watch the water through the window to see when it boils.
  • If water boils in less than 2 minutes, it is a very high wattage oven 1000 watts or more.
  • If water boils in 2½ minutes, it is a high wattage oven about 800 watts or more.
  • If water boils in 3 minutes, it is an average wattage oven 650 to 700 watts or more.
  • If water boils in more than 3 minutes or not by 4 minutes, it is a slow oven 300 to 500 watts.
Use the minimum cooking time given for high wattage ovens; use the maximum cooking time for slow ovens. The minimum cooking time may need to be reduced for very high wattages.