Fahrenheit to Celsius Conversion
Quick formula: °C = (°F - 32) ÷ 1.8 — with common conversions
⚡Quick Answer
°C = (°F - 32) ÷ 1.8. Quick trick: subtract 30, then halve it. Key points: 32°F=0°C (freezing), 212°F=100°C (boiling), 98.6°F=37°C (body temp).
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Step-by-Step Guide
The Formula
°C = (°F - 32) × 5/9 — Subtract 32 from Fahrenheit, multiply by 5, divide by 9. Or simply: °C = (°F - 32) ÷ 1.8
Quick Mental Math
For a rough estimate: Subtract 30, then halve it. Example: 86°F → 86 - 30 = 56 → 56 ÷ 2 = 28°C (actual: 30°C).
Common Conversions
32°F = 0°C (freezing) | 50°F = 10°C | 68°F = 20°C | 77°F = 25°C | 86°F = 30°C | 98.6°F = 37°C (body temp) | 212°F = 100°C (boiling)
Example Calculation
Convert 77°F to Celsius: 77 - 32 = 45, then 45 ÷ 1.8 = 25°C. So 77°F = 25°C (comfortable room temp).
Frequently Asked Questions
What temperature is the same in Fahrenheit and Celsius?
-40 is where they meet! -40°F = -40°C. This is the only temperature that's identical on both scales.
Is 100°F a fever?
100°F is about 37.8°C, which is slightly elevated. A fever is generally 100.4°F (38°C) or higher.
What is room temperature in Fahrenheit?
Room temperature is typically 68-72°F (20-22°C). Most thermostats are set in this range.