Conversion chart

1200W to 700W microwave time chart.

Use this page when food instructions are written for a 1200 watt microwave but your microwave is rated at 700 watts. The chart uses exact-second conversion so the math stays transparent.

1200W to 700W formula

Multiply the original cooking time by 1200 and divide by 700. If the converted time looks unusual, use the live calculator below to check your exact minutes and seconds.

Adjusted Time = Original Time × 1200 ÷ 700

Quick reference table

1200W instructions converted for a 700W microwave, using exact-second conversion.
Original time Converted time Difference
0:30 0:51 0:21 longer
0:45 1:17 0:32 longer
1:00 1:43 0:43 longer
1:15 2:09 0:54 longer
1:30 2:34 1:04 longer
2:00 3:26 1:26 longer
2:30 4:17 1:47 longer
3:00 5:09 2:09 longer
3:30 6:00 2:30 longer
4:00 6:51 2:51 longer
5:00 8:34 3:34 longer
6:00 10:17 4:17 longer
7:00 12:00 5:00 longer
8:00 13:43 5:43 longer
10:00 17:09 7:09 longer
12:00 20:34 8:34 longer
15:00 25:43 10:43 longer
20:00 34:17 14:17 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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