Microwave cooking times assume a particular oven power. Lower-power microwaves need longer, higher-power ones less. The relationship is roughly inverse: halving the power doubles the time. Always check food is piping hot throughout and stir halfway.
How to use the Microwave Wattage Converter
- Wattage on the food label
- Label cooking time
- Your microwave wattage
Results update as you type, and every field accepts the units shown in its menu.
How it works
Choose the wattage on the label and the label time, then your microwave’s wattage (on a sticker inside the door or on the back).
Tips
- Use the figures from your own bills and product labels – prices and appliance ratings vary widely.
- Look at yearly totals: small daily costs add up and make it easier to compare options.
- Round quantities up to whole packs, rolls or bulbs when you shop.
- Re-check the numbers when prices change; most results scale directly with the unit price.
Common mistakes to avoid
- Confusing watts (power) with watt-hours or kilowatt-hours (energy).
- Comparing prices without bringing them to the same unit first.
- Ignoring one-off costs such as installation, delivery or replacement parts.
Inputs explained
| Field | What to enter |
|---|---|
| Wattage on the food label | Choose one: 600 W, 650 W, 700 W, 750 W … |
| Label cooking time | Units: min, s |
| Your microwave wattage | Choose one: 600 W, 650 W, 700 W, 750 W … |
What each result means
- Your cooking time = [Label cooking time]×[Wattage on the food label]÷[Your microwave wattage]
- Your cooking time (min:s) = [Your cooking time]÷60
Example values
How the main result changes when Label cooking time changes and everything else stays at the example values above:
| Label cooking time (min) | Your cooking time (s) |
|---|---|
| 1.5 | 113 |
| 2.25 | 169 |
| 3 | 225 |
| 3.75 | 281 |
| 4.5 | 338 |
| 6 | 450 |
Formula
Your time = label time × label wattage ÷ your wattageWorked example
Inputs — Wattage on the food label: 1000 W; Label cooking time: 3 min; Your microwave wattage: 800 W.
Results — Your cooking time = 225 s; Your cooking time (min:s) = 3:45.
Frequently asked questions
How do I convert microwave times from 1,000 W to 800 W?
Multiply the time by 1.25: 3 minutes becomes 3 min 45 s.
Where do I find my microwave's wattage?
On a label inside the door, on the back plate or in the manual.
Should I let food stand?
Yes – standing time lets heat spread evenly; follow the label.
What formula does the Microwave Wattage Converter use?
Your time = label time × label wattage ÷ your wattage.