Is the result exact?
It is an estimate based on wattage. Results vary by microwave model, food amount, temperature, and container, so use it as a guide.
Kitchen
Microwave Wattage Converter
Quickly convert heating time when a recipe or package uses a different microwave wattage from yours.
Updated: May 15, 2026
Result preview
From 2 min 30 sec at 500W to 600W
2 min 05 sec
Package label
Choose the conditions written on the package or recipe.
Package wattage
Package heating time
02min30sec
Target conditions
Choose the wattage of the microwave you will actually use.
Microwave wattage to use
Converted heating time
Estimated time when heating at 600W.
Converted heating time: 2 min 05 sec
Formula: 500W × 2 min 30 sec ÷ 600W
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How to use
- Choose the wattage written on the package or recipe on the left.
- Set the heating time written on the package or recipe on the left.
- Choose the wattage of the microwave you will actually use on the right to see the converted time.
Formula
Converted seconds = original wattage × original seconds ÷ target wattage. Microwave efficiency and food condition vary, so heat for a shorter time first and adjust.
Notes
- Food amount, container, placement, and microwave model can change the result.
- For frozen foods, meat, and fish, always check that the center is heated properly.
- When unsure, heat for a shorter time and add more time gradually.
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FAQ
Are my inputs saved?
This page calculates in your browser and does not send the input values to a server.
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