Where Fahrenheit-to-Celsius matters
Three things dominate: following a US recipe on a European oven, reading a weather forecast in the wrong units, and checking a fever thermometer that's calibrated in Fahrenheit.
- • Use °F For: US recipes and cookbooks, US weather forecasts, US clinical thermometers, US HVAC displays
- • Use °C For: EU oven dials (usually Celsius), European recipe adaptation, Metric weather reports, Metric medical devices
Rule of Thumb: For cooking: 325°F = 163°C, 350°F = 177°C, 375°F = 191°C, 400°F = 204°C.
Fahrenheit to Celsius Conversion Formula — How to Convert °F to °C
°C = (°F − 32) × 5/9
Quick mental estimate: °C ≈ (°F − 30) ÷ 2
Step-by-Step °F to °C Conversion Examples:
- •A 350°F oven:(350 − 32) × 5/9 =176.7°C (round to 180°C)
- •A normal body temperature:(98.6 − 32) × 5/9 =37°C
- •A 72°F room:(72 − 32) × 5/9 =22.2°C
Why the Fahrenheit to Celsius Conversion Works & Common °F to °C Converter Mistakes to Avoid
Celsius and Fahrenheit place zero in different spots. Subtracting 32 first removes Fahrenheit's offset from Celsius's freezing point, then multiplying by 5/9 shrinks the 180-degree Fahrenheit span down to Celsius's 100-degree span.
The Common °F to °C Converter Mistake: Guessing with the quick estimate (°F − 30) ÷ 2 for anything medical. On a 100.4°F fever, the estimate gives 35°C — a dangerously low reading.
Fahrenheit to Celsius Real-World Size Comparison Table
These are the numbers you'll actually look up: the standard oven settings you find in US recipes, plus the weather and medical readings you might need when the units don't match your thermometer.
| Fahrenheit (°F) | Celsius (°C) | Real-World Size Benchmark |
|---|---|---|
| 32 °F | 0 °C | Water freezes |
| 68 °F | 20 °C | A comfortable room |
| 98.6 °F | 37 °C | Normal body temperature |
| 100.4 °F | 38 °C | The clinical fever threshold |
| 212 °F | 100 °C | Water boils |
| 325 °F | 162.8 °C | A low baking oven |
| 350 °F | 176.7 °C | The standard baking temperature |
| 400 °F | 204.4 °C | A high baking oven |
°F to °C Converter in Spreadsheets — Spreadsheet Shortcut (Excel & Google Sheets)
=(A1-32)*5/9 for Fahrenheit → Celsius. =A1*9/5+32 for the reverse.
Fahrenheit to Celsius Conversion — Frequently Asked Questions
How do I convert Fahrenheit to Celsius?
Subtract 32, then multiply by 5/9. For example, 77°F − 32 = 45, then 45 × 5/9 = 25°C.
What is 350°F in Celsius for baking?
176.7°C. Most European recipes call for 180°C.
Is 100.4°F a fever in Celsius?
Yes. 100.4°F = 38°C.
What is 98.6°F in Celsius?
Exactly 37°C.
°F to °C Quick-Reference Conversion Table
The conversions you'll look up most often when cooking, checking weather, or reading a thermometer.
| To convert | Operation | Example |
|---|---|---|
| °F → °C | (− 32) × 5/9 | 212°F → 100°C |
| °C → °F | (× 9/5) + 32 | 100°C → 212°F |
| °F → K | (− 32) × 5/9 + 273.15 | 32°F → 273.15 K |
| K → °F | (− 273.15) × 9/5 + 32 | 373.15 K → 212°F |