Convert Fahrenheit to Celsius in One Click
Type any temperature in Fahrenheit and get the exact Celsius value instantly. Whether you're reading a US weather forecast, following a recipe, or checking a fever, this converter gives you the answer without mental math.
32 °F = 0 °C (freezing point) is the single most searched conversion — you can confirm it in the tool above.
How to Use the Fahrenheit to Celsius Calculator
- Enter your temperature in the Fahrenheit field above.
- The Celsius result appears immediately — no button to press.
- Need to go the other way? Flip the conversion to convert Celsius to Fahrenheit in the same tool.
Worked Example: 98.6 °F to Celsius
98.6 °F is the classic human body temperature in the US system. Here is how the conversion works step by step:
- Subtract 32: 98.6 − 32 = 66.6
- Multiply by 5/9: 66.6 × 5 ÷ 9 = 37 °C
Result: 98.6 °F = 37 °C. That is normal body temperature on the Celsius scale used in most countries.
How the Fahrenheit to Celsius Formula Works
The official formula (defined by the International Bureau of Weights and Measures) is:
°C = (°F − 32) × 5 / 9In plain words: subtract 32 to remove the offset, then scale by 5/9 because a Fahrenheit degree is smaller than a Celsius degree.
Common Fahrenheit to Celsius Reference Values
| Fahrenheit (°F) | Celsius (°C) | What it typically means |
|---|---|---|
| 1 °F | −17.2 °C | Extreme cold |
| 2 °F | −16.7 °C | Extreme cold |
| 5 °F | −15 °C | Very cold winter day |
| 10 °F | −12.2 °C | Freezing conditions |
| 25 °F | −3.9 °C | Below freezing |
| 50 °F | 10 °C | Cool autumn day |
| 100 °F | 37.8 °C | Hot day / low-grade fever |
Reverse formula (Celsius to Fahrenheit): °F = (°C × 9 / 5) + 32
Other Ways People Ask This Question
People phrase this conversion in lots of different ways. Here are the most common ones and when each applies:
- "F to C" / "°F to °C" — shorthand for the same thing; use the tool above for any value.
- "Convert body temperature to Celsius" — enter 98.6 °F (normal) or 100.4 °F (low-grade fever threshold) to get the metric equivalent.
- "Oven temperature in Celsius" — US recipes often say 350 °F; that is 176.7 °C (usually rounded to 180 °C).
- "Weather forecast conversion" — if a US forecast says 77 °F, that is a pleasant 25 °C.
- "Celsius to Fahrenheit" — flip the tool; it works both directions.
Quick Tips and Common Mistakes
- Don't skip the −32 step. The most common hand-calculation error is multiplying by 5/9 before subtracting 32 — the result will be wrong.
- Negative Fahrenheit is still above absolute zero — you can enter negative values; the tool handles them correctly.
- Rounding matters in cooking. 177 °C and 180 °C both come from 350 °F depending on how you round. Recipes usually give the rounded value — both are fine.
- 37 °C ≠ 37 °F. These are very different temperatures. Celsius 37 is normal body temperature; Fahrenheit 37 is well below freezing.
- Quick mental shortcut: double the Celsius value and add 30 to get a rough Fahrenheit estimate (works best between 0–30 °C). It is not exact, but useful for a quick sanity check.
Everything is calculated directly in your browser — no data is sent to any server, so your inputs stay private.
Ready to convert? Enter your Fahrenheit temperature in the calculator above and get the Celsius result right away.