Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Use microwave output power, not wall input rating. Approximation only; it does not establish doneness or safe food temperature.
Example Calculation
- Recipe output power: 800 W
- Your output power: 1000 W
- Recipe heating time: 120 s
120 seconds at 800 W is energy-equivalent to 96 seconds at 1000 W.
Frequently asked questions
How do I use this calculator?
Enter recipe output power, your output power, recipe heating time. The result updates automatically. Use Reset to restore the example values.
What method does it use?
adjusted time=original time × original output watts/new output watts.. Use microwave output power, not wall input rating. Approximation only; it does not establish doneness or safe food temperature.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.