"Instant Temperature Converter - Convert Celsius, Fahrenheit & Kelvin Easily"
Effortlessly switch between Celsius, Fahrenheit, and Kelvin with our user-friendly Temperature Converter. Quick, accurate, and simple. Try it now!
Fahrenheit to Celsius Converter: Fast, Friendly, and Fun
The formula
°C = (°F − 32) × 5/9. Subtracting 32 first accounts for the offset between the two scales' zero points (0°C is 32°F), then the 5/9 factor rescales degrees Fahrenheit into degrees Celsius, since a Celsius degree is 1.8× larger than a Fahrenheit degree.
Worked example
Normal human body temperature, 98.6°F: (98.6 − 32) × 5/9 = 66.6 × 5/9 = 37.00°C.
Fixed points worth memorizing
| °F | °C | What it is |
|---|---|---|
| 32 | 0.00 | Water freezes |
| 68 | 20.00 | Room temperature |
| 98.6 | 37.00 | Body temperature |
| 212 | 100.00 | Water boils (sea level) |
A mental-math shortcut
For a rough estimate without a calculator, subtract 30 and halve it: 98.6 − 30 = 68.6, halved ≈ 34.3 — close to the real 37.00°C but not exact, because it approximates 5/9 (0.5556) as 0.5. Use the tool above when you need the precise figure rather than a ballpark.
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