Fahrenheit to Celsius Converter
Convert kitchen and oven temperatures from Fahrenheit to Celsius, fan-forced convection, and UK Gas Marks.
Interactive Fahrenheit to Celsius (°F to °C) Converter
Convert baking and culinary temperatures from Fahrenheit to Celsius, fan-forced convection (-20°C), and UK Gas Marks.
Oven Settings & Culinary Equivalents
Conventional, fan-forced convection (-20°C / -25°F), and UK Gas MarkUnderstanding Fahrenheit to Celsius (°F to °C) Conversion
Converting oven and kitchen temperatures between Fahrenheit (°F) and Celsius (°C) is essential when preparing recipes from American cookbooks on European, Australian, or international kitchen equipment.
Because both temperature scales use different starting reference points and degree increments, temperature conversion is not a simple direct multiplier:
- Fahrenheit Scale: Water freezes at 32°F and boils at 212°F (an interval of 180 degrees).
- Celsius Scale: Water freezes at 0°C and boils at 100°C (an interval of 100 degrees).
- Degree Ratio: Each 1°C is equivalent to exactly 1.8°F (or 9/5°F). Therefore, converting from Fahrenheit always requires subtracting 32 before scaling by 5/9.
How to Convert Fahrenheit to Celsius: Formula & Calculation
°C = (°F - 32) × 5 / 9 - Subtract 32: Deduct 32 from your recipe's Fahrenheit temperature to align with the freezing point of water.
- Multiply by 5: Multiply that intermediate figure by 5.
- Divide by 9: Divide by 9 to arrive at the exact Celsius temperature.
- Quick Kitchen Estimation: In a busy kitchen, a helpful mental shortcut is: (°F - 30) ÷ 2. For example, (350 - 30) ÷ 2 = 160°C. Note that while handy for rough estimates, pastry baking requires the exact formula (176.7°C rounded to 175°C or 180°C on oven dials).
Worked Culinary Examples
Example 1: Room Temperature (70°F)
Pantry ingredients, dough proofing, and softened butter for creaming.
- Formula: (70 - 32) × 5/9.
- Calculation: 38 × 5/9 = 21.11°C.
- Kitchen context: Room temperature in baking is standardly 68°F–72°F (20°C–22°C). This allows softened butter to emulsify properly with sugar without melting.
Example 2: Refrigerator Cold Storage (39°F)
Chilling pastry dough and safely storing dairy, eggs, and raw meats.
- Formula: (39 - 32) × 5/9.
- Calculation: 7 × 5/9 = 3.89°C.
- Food Safety Note: According to USDA FSIS guidelines, household refrigerators should be set at or below 40°F (4.4°C) to prevent bacterial growth and safely preserve perishables.
Example 3: Standard Cake Baking (350°F)
The universal benchmark for chocolate chip cookies, layer cakes, and quick breads.
- Formula: (350 - 32) × 5/9.
- Calculation: 318 × 5/9 = 176.67°C.
- Oven dial setting: European ovens mark increments of 10°C or 20°C; round to 175°C or 180°C. For fan-assisted / convection ovens, reduce by 20°C to 160°C (UK Gas Mark 4).
Example 4: High-Heat Oven Roasting (400°F)
Roasting whole chicken, golden crispy potatoes, and roasted autumn vegetables.
- Formula: (400 - 32) × 5/9.
- Calculation: 368 × 5/9 = 204.44°C.
- Oven dial setting: Set conventional ovens to 200°C–205°C. For fan-forced convection, reduce to 180°C–185°C (UK Gas Mark 6).
Quick Reference Oven & Cooking Temperature Chart
Reference conversion chart covering standard kitchen milestones from freezing to pizza baking:
| Fahrenheit (°F) | Celsius (°C Exact) | Standard Dial (°C) | Fan-Forced (°C) | UK Gas Mark | Culinary Milestone & Use |
|---|---|---|---|---|---|
| 32°F | 0°C | 0°C | — | — | Freezing point of water (32°F / 0°C) |
| 39°F | 3.9°C | 5°C | — | — | Safe refrigerator temperature (39°F / 4°C, USDA safe zone) |
| 70°F | 21.1°C | 20°C | 1°C | — | Standard room temperature (68°F–72°F / 20°C–22°C) |
| 100°F | 37.8°C | 40°C | 18°C | — | Culinary heating range |
| 140°F | 60°C | 60°C | 40°C | — | Culinary heating range |
| 165°F | 73.9°C | 75°C | 54°C | — | Culinary heating range |
| 180°F | 82.2°C | 80°C | 62°C | — | Gentle water simmering & poaching (180°F–205°F) |
| 212°F | 100°C | 100°C | 80°C | — | Boiling point of water (212°F / 100°C at sea level) |
| 250°F | 121.1°C | 120°C | 101°C | Gas Mark 1/4 | Culinary heating range |
| 275°F | 135°C | 135°C | 115°C | Gas Mark 1 | Culinary heating range |
| 300°F | 148.9°C | 150°C | 129°C | Gas Mark 2 | Low-heat slow baking / custards / meringues (300°F) |
| 325°F | 162.8°C | 165°C | 143°C | Gas Mark 3 | Culinary heating range |
| 350°F | 176.7°C | 175°C | 157°C | Gas Mark 4 | Standard baking temperature for cakes, cookies & muffins (350°F) |
| 375°F | 190.6°C | 190°C | 171°C | Gas Mark 5 | Moderate-high baking for pastry & roasted veggies (375°F) |
| 400°F | 204.4°C | 205°C | 184°C | Gas Mark 6 | High roasting for chicken, meats & root vegetables (400°F) |
| 425°F | 218.3°C | 220°C | 198°C | Gas Mark 7 | High heat for artisan sourdough bread & crisp roasting (425°F) |
| 450°F | 232.2°C | 230°C | 212°C | Gas Mark 8 | Ultra-high heat for homemade pizza & broiling (450°F–500°F) |
| 475°F | 246.1°C | 245°C | 226°C | Gas Mark 9 | Ultra-high heat for homemade pizza & broiling (450°F–500°F) |
| 500°F | 260°C | 260°C | 240°C | Gas Mark 10 | Ultra-high heat for homemade pizza & broiling (450°F–500°F) |
Conventional vs. Fan-Forced (Convection) Ovens
Many European, Australian, and modern American ovens feature a convection or fan-forced mode. Understanding how this affects your baking temperature is critical:
- How Convection Works: A built-in fan circulates heated air continuously around the food, eliminating cold air pockets and accelerating heat transfer.
- The 20°C / 25°F Rule: Because fan ovens transfer heat much more efficiently, reduce the specified conventional oven temperature by 20°C (or 25°F), or decrease the baking time by 20% to 25%.
- Example: An American recipe calling for 350°F (177°C) conventional bake should be baked at 160°C (325°F) in a fan-forced oven to prevent prematurely browned crusts with raw centers.
USDA Food Safety Temperature Guidelines
Accurate temperature measurement is vital for food safety. The USDA Food Safety and Inspection Service (FSIS) recommends the following verified benchmarks:
Refrigerator Cold Storage (≤ 40°F / 4.4°C)
Keep refrigerators at 40°F (4.4°C) or below (ideal range: 35°F–38°F / 1.7°C–3.3°C) to slow bacterial growth and ensure milk, cream, and meats remain fresh.
The "Danger Zone" (40°F – 140°F / 4.4°C – 60°C)
Bacteria multiply most rapidly in this zone. Per USDA FSIS guidance, perishable cooked foods should not sit at room temperature for more than 2 hours (or 1 hour above 90°F / 32°C).
Safe Internal Poultry Temp (165°F / 74°C)
All poultry (chicken, turkey, duck—both whole and ground) must reach an internal temperature of 165°F (74°C) measured with an instant-read probe thermometer.
Ground Meats & Beef (160°F / 71°C)
Ground beef, pork, and lamb must reach 160°F (71°C). Whole steaks and roasts require at least 145°F (63°C) with a 3-minute rest time.
Common Temperature Conversion Mistakes
Forgetting to adjust for Fan-Forced / Convection
Fan-forced ovens run significantly hotter due to air circulation. Forgetting to subtract 20°C (25°F) can lead to burnt cakes that remain gooey inside.
Relying on built-in oven dial calibration
Home oven dials frequently run 15°F to 30°F higher or lower than the set dial temperature. Hang an inexpensive standalone oven thermometer on the center rack for accurate results.
Opening the oven door repeatedly
Opening the oven door drops the internal chamber temperature by 25°F to 50°F (15°C–28°C), disrupting rising soufflés, sponge cakes, and breads.
Linear ratio error without offset
Never multiply Fahrenheit directly by 5/9 without subtracting 32 first. Because 0°F does not equal 0°C, direct scaling causes severe calculation errors.