Record the settings that matter
Keep the recipe’s stated cooking wattage, power setting, amount and food description together. Also note whether the recipe is written for cooking, reheating or defrosting. These are useful details to preserve when comparing instructions.
Find your microwave’s model information and cooking output in the manufacturer’s documentation. Do not assume that every electrical rating printed on an appliance means the same thing as the cooking wattage used by the recipe.
Use the manufacturer’s guidance
GE explains that cooking time depends on food amount, size, shape, density and starting temperature as well as wattage. A calculation using wattage alone leaves out those variables.
Its recipe-wattage advice recommends working from the shorter end of a stated time range and checking before adding small increments. Treat this as the manufacturer’s guidance in context, and keep any food-specific instructions from the recipe or packaging.
Keep the full method
An instruction to stir, rearrange, cover or stand is part of a recipe, not decoration around a timer. If you save a converted version, keep all of those steps with it instead of recording only a new number of minutes.
When a recipe does not match the food quantity or preparation you have, look for a more suitable version. A precise-looking number cannot supply the missing method or confirm the result.
What the conversion tools can do
Use the unit chart to read ingredient quantities in a different measurement system. Use the recipe scaler for arithmetic on a numeric ingredient list, then review whether the original microwave method still applies.
This site does not claim to convert all microwave cooking times reliably. If a future tool offers a model-specific estimate, it must identify the source, required food context and limits next to the output. Until those details are available, the official recipe and appliance instructions are the useful reference.