Celsius to Fahrenheit
100°C to Fahrenheit
100°C is 212°F, below Gas Mark ¼. In a fan oven, use 80°C.
100 degrees Celsius equals
212°F
Nearest US oven setting: 200°F
What 100°C is used for
Very cool oven
100°C is the boiling point of water at sea level, but in an oven it is a very gentle heat. It is used for drying (oven-dried tomatoes, citrus slices, herbs) and for keeping cooked food warm. Gas oven dials usually start at Gas Mark ¼ (about 110°C), so 100°C is below the gas scale.
Typical uses at this heat: meringues, drying fruit or herbs, keeping food warm.
Not sure your oven really reaches 100°C? Many ovens run hotter or cooler than the dial. See how to check your oven’s temperature.
How to convert 100°C to °F
Multiply by 9, divide by 5, then add 32:
180 + 32 = 212°F
The quick “double it and add 30” trick gives 230°F, which is 18°F too high at this temperature. That’s fine for weather but not for baking, so use the exact figure.
100°C in different ovens
| Oven type | Setting |
|---|---|
| Conventional (top and bottom heat) | 100°C / 212°F |
| Fan oven | 80°C |
| US convection oven | 185°F |
| Gas oven | Below ¼ |
| Air fryer | 85°C / 185°F |
Convert another temperature
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Nearby temperatures
| Celsius | Fahrenheit | Gas Mark | Fan oven |
|---|---|---|---|
| 100°C | 212°F | Below ¼ | 80°C |
| 110°C | 230°F | Gas Mark ¼ | 90°C |
| 120°C | 248°F | Gas Mark ½ | 100°C |
| 130°C | 266°F | Between ½ and 1 | 110°C |
| 140°C | 284°F | Gas Mark 1 | 120°C |
Common questions
What is 100°C in Fahrenheit?
100°C is 212°F. On a US oven dial, use 200°F.
What Gas Mark is 100°C?
100°C is below Gas Mark ¼. Gas ovens are not usually marked this low.
What is 100°C in a fan oven?
Use 80°C in a fan oven. Fan ovens circulate hot air, so UK recipes reduce the conventional temperature by 20°C. If your recipe already says “100°C fan”, don’t reduce it again.
Is 100°C hot?
100°C counts as a very cool oven. Typical uses: meringues, drying fruit or herbs, keeping food warm.
More Celsius conversions
Going the other way? See 350°F to °C and the other Fahrenheit conversions.