Oven Temperature Converter
Convert between °C, °F, and Gas Mark with optional fan oven adjustment.
Celsius
180°C
Fahrenheit
356°F
Gas Mark
Gas 4
Quick Facts
- •Gas Mark conversions are approximate; ovens vary by manufacturer
- •Fan ovens typically run 20°C hotter than conventional, so reduce by 20°C
- •180°C = 356°F ≈ Gas Mark 4 — the most common baking temperature
- •Always preheat your oven for 10–15 minutes before baking
Oven Temperature Conversion Chart
| Gas Mark | °C (Conventional) | °C (Fan) | °F |
|---|---|---|---|
| Gas ¼ | 110°C | 90°C | 225°F |
| Gas ½ | 130°C | 110°C | 250°F |
| Gas 1 | 140°C | 120°C | 275°F |
| Gas 2 | 150°C | 130°C | 300°F |
| Gas 3 | 160°C | 140°C | 325°F |
| Gas 4 | 180°C | 160°C | 350°F |
| Gas 5 | 190°C | 170°C | 375°F |
| Gas 6 | 200°C | 180°C | 400°F |
| Gas 7 | 220°C | 200°C | 425°F |
| Gas 8 | 230°C | 210°C | 450°F |
| Gas 9 | 240°C | 220°C | 475°F |
Gas Mark conversions are approximate; ovens vary.
How to Convert Gas Mark to Celsius
Gas Mark values don't follow a simple formula. Use the standard lookup table above. For a rough estimate: °C ≈ Gas Mark × 25 + 125 (approximate for marks 1–9).
Fan Oven vs Conventional: What Changes?
Fan (convection) ovens circulate hot air, cooking food more evenly and quickly. The standard adjustment is to reduce the temperature by 20°C compared to a conventional oven setting.
For example, if a recipe says 200°C conventional, use 180°C for a fan oven. This is a rule of thumb — consult your oven manual for specific guidance.
Worked Examples
Gas Mark 6 →
Gas 6 = 200°C (conventional) = 180°C (fan) = 400°F
180°C (conventional) →
180°C ≈ Gas Mark 4 = 356°F (fan: 160°C)
350°F →
350°F ≈ 176.7°C ≈ Gas Mark 4 (fan: 156.7°C)
Related Converters
Frequently Asked Questions
What is Gas Mark 6 in Celsius?
Gas Mark 6 is approximately 200°C (400°F). This is a common baking temperature.
What temperature should I use for a fan oven?
A common rule of thumb is to reduce the conventional oven temperature by 20°C (or about 25°F) for a fan (convection) oven.
Are Gas Mark conversions exact?
Gas Mark values are approximate; actual temperatures can vary between oven manufacturers.
What is 180°C in Gas Mark and Fahrenheit?
180°C ≈ Gas Mark 4 and 356°F. Gas Mark 4 is typically listed as 350°F.
What temperature is 'moderate oven'?
A moderate oven is typically 160–180°C (325–350°F), or Gas Mark 3–4.
Does fan oven always mean 20°C less?
The 20°C reduction is a widely used rule of thumb, but check your oven manual as some modern ovens auto-adjust.