Microwave Wattage Calculator

Adjust cooking times when your microwave wattage differs from the recipe.

Recipe Specs

Recipe Wattage (W)

Recipe Time (min)

Enter as decimal (e.g., 5.5 for 5:30)

Your Microwave

Your Microwave (W)

Check the sticker on the back or inside the door

Timing Adjustment

Adjusted Time

7:09

+2:09 from recipe

Power Factor1.43xYour microwave is slower

Standard recipe microwave wattages are typically 1000W or 1100W. If yours is a 700W model, you nearly always need to add time.

About this calculator

Overview

Cooking time scales with power. Higher wattage = shorter time. Formula: New time = Old time × (Recipe watts / Your watts).

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Pro Tips

Fun Facts

Formula: Adjusted Time = Recipe Time × (Recipe W / Your W)