SaucepanLog inDownload

Oven temperature converter: °F, °C, gas mark

350°F is 177°C and gas mark 4. For a convection oven, lower the temperature by 25°F. Enter a temperature in any scale.

Free, no sign-up · Updated November 4, 2026

Temperature in
My oven is

Set the oven to

—°F
Celsius
°C
Gas mark
Recipe was for
°F conventional

Oven temperatures

Conventional oven
Gas mark°F°C
¼225110
½250120
1275140
2300150
3325170
4350180
5375190
6400200
7425220
8450230
9475240
10500260

Celsius figures are the ones printed on kitchen charts, rounded to the nearest 10. The exact conversion is in the result above.

Convection and fan ovens

Fan ovens move the air, so food cooks faster. Lower the temperature of a recipe written for a conventional oven by 25°F, and check a few minutes early. Some manufacturers say 25 to 50°F lower and about 30% less time.

How it is calculated

  • °C = (°F − 32) × 5 ÷ 9. °F = °C × 9 ÷ 5 + 32.
  • Gas mark: 275°F is mark 1, and each mark adds 25°F. Mark ¼ is 225°F, mark ½ is 250°F.
  • Convection: conventional temperature − 25°F (about 14°C).

Worked example

350°F = 176.7°C, gas mark 4. In a convection oven, set 325°F.

Sources

Numbers checked November 4, 2026.

Questions

What is 350°F in Celsius?

176.7°C. Recipes round it to 175°C or 180°C.

What gas mark is 350°F?

Gas mark 4.

How do I convert Celsius to Fahrenheit?

Multiply by 9, divide by 5, add 32.

How do I adjust for a convection or fan oven?

Lower the temperature by 25°F (about 14°C) and start checking a few minutes early. America's Test Kitchen says manufacturers often call for 25 to 50°F lower and about 30% less time. Check the manual for your oven.

Why do gas mark charts disagree?

Gas marks are defined in steps of 25°F, but the Celsius column is rounded, and charts round differently. The Fahrenheit figures are the exact ones.

Is my oven accurate?

Maybe not: USDA lists an inaccurate oven temperature among the reasons a roast takes longer than the chart. An oven thermometer is the way to know.