Fahrenheit to Celsius
400°F to Celsius
400°F is 204.4°C (Gas Mark 6). On a UK oven, set 200°C (or 180°C fan).
400 degrees Fahrenheit equals
204°C
Exactly 204.4°C · UK oven setting: 200°C
What 400°F is used for
Moderately hot oven
400°F is Gas Mark 6. The exact figure is 204.4°C, and UK recipes write it as 200°C. It is a common setting for roasting vegetables and chicken pieces.
Typical uses at this heat: roast chicken, muffins, lasagne, bread.
Oven dials can be out by a surprising amount. Here’s how to check yours with an oven thermometer.
How to convert 400°F to °C
Subtract 32, then multiply by 5 and divide by 9:
368 × 5 ÷ 9 = 204.4°C
UK oven dials go up in 10°C steps, so recipes round this to 200°C.
400°F in different ovens
| Oven type | Setting |
|---|---|
| Conventional oven | 400°F / 200°C |
| US convection oven | 375°F |
| UK fan oven | 180°C |
| Gas oven | Gas Mark 6 |
| Air fryer | 375°F / 190°C |
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Nearby temperatures
| Fahrenheit | Celsius (exact) | Gas Mark | Convection |
|---|---|---|---|
| 325°F | 162.8°C | Gas Mark 3 | 300°F |
| 350°F | 176.7°C | Gas Mark 4 | 325°F |
| 375°F | 190.6°C | Gas Mark 5 | 350°F |
| 400°F | 204.4°C | Gas Mark 6 | 375°F |
| 425°F | 218.3°C | Gas Mark 7 | 400°F |
| 450°F | 232.2°C | Gas Mark 8 | 425°F |
| 475°F | 246.1°C | Gas Mark 9 | 450°F |
Common questions
What is 400°F in Celsius?
400°F is 204.4°C. UK recipes and oven dials round it to 200°C.
What Gas Mark is 400°F?
400°F is Gas Mark 6.
What is 400°F in a fan or convection oven?
In a US convection oven, use 375°F (25°F lower). In a UK fan oven, use 180°C. Many newer US ovens subtract the 25°F automatically in convection mode, so check your manual before you reduce it twice.
Is 400°F hot?
400°F (204°C) counts as a moderately hot oven. Typical uses: roast chicken, muffins, lasagne, bread.
More Fahrenheit conversions
Going the other way? See 180°C to °F and the other Celsius conversions.