Menu
Search
Menu
Close

Converting Oven and Instant-Read Thermometer Temperatures

By Cook's Illustrated Published January 2009

Guidelines for converting Fahrenheit degrees to Celsius and Gas Mark.

Refer to our oven temperature table to convert Fahrenheit degrees to Celsius and Gas Mark (Imperial):

OVEN TEMPERATURES

FAHRENHEIT CELSIUS GAS MARK (IMPERIAL)
225 105 1/4
250 120 1/2
275 130 1
300 150 2
325 165 3
350 180 4
375 190 5
400 200 6
425 220 7
450 230 8
475 245 9

We include doneness temperatures in many of our recipes, such as those for poultry, meat, and bread. We recommend an instant-read thermometer for the job. For temperatures not represented in the chart above, use this simple formula:

Subtract 32 degrees from the Fahrenheit reading, then divide the result by 1.8 to find the Celsius reading.

EXAMPLE:

“Roast until the juice runs clear when the chicken is cut with a paring knife or the thickest part of the breast registers 160 degrees on an instant-read thermometer.” To convert:

160˚ F - 32 = 128˚

128˚ ÷ 1.8 = 71˚ C (rounded down from 71.11)