Conversion chart

1100W to 800W microwave time chart.

Use this page when food instructions are written for a 1100 watt microwave but your microwave is rated at 800 watts. The chart uses exact-second conversion so the math stays transparent.

1100W to 800W formula

Multiply the original cooking time by 1100 and divide by 800. If the converted time looks unusual, use the live calculator below to check your exact minutes and seconds.

Adjusted Time = Original Time × 1100 ÷ 800

Quick reference table

1100W instructions converted for a 800W microwave, using exact-second conversion.
Original time Converted time Difference
0:30 0:41 0:11 longer
0:45 1:02 0:17 longer
1:00 1:23 0:23 longer
1:15 1:43 0:28 longer
1:30 2:04 0:34 longer
2:00 2:45 0:45 longer
2:30 3:26 0:56 longer
3:00 4:08 1:08 longer
3:30 4:49 1:19 longer
4:00 5:30 1:30 longer
5:00 6:53 1:53 longer
6:00 8:15 2:15 longer
7:00 9:38 2:38 longer
8:00 11:00 3:00 longer
10:00 13:45 3:45 longer
12:00 16:30 4:30 longer
15:00 20:38 5:38 longer
20:00 27:30 7:30 longer

Calculator for custom times

Enter the exact package time if it is not shown in the chart.

Original cooking time

Adjusted cooking time

0:00

Enter a wattage pair and cooking time to calculate the estimate.

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