Convert Fahrenheit to Celsius
Convert Fahrenheit to Celsius instantly — the real affine formula, quick table, nothing uploaded.
Common conversions
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Fahrenheit to Celsius, reading US weather like a local
Traveling to the US or reading an American recipe means decoding Fahrenheit, and intuition fails because the scale is offset, not just scaled. The exact formula is °C = (°F − 32) × 5/9 — subtract first, then multiply. This converter implements exactly that.
This page presets the converter to Fahrenheit → Celsius. Type 72 and you get 22.2222 °C for a pleasant day; type 98.6 and you get exactly 37 °C; type 32 and you get 0 °C, the freezing point both scales agree on.
The quick table below anchors the everyday bands — cold, cool, warm, hot — plus body and cooking temperatures, all computed locally in your browser.
Quick conversion table
Common values at a glance — computed locally with exact standard factors.
| Value (°F) | Converted (°C) |
|---|---|
| -40 | -40 |
| -20 | -28.8889 |
| 0 | -17.7778 |
| 25 | -3.88889 |
| 50 | 10 |
| 75 | 23.8889 |
| 100 | 37.7778 |
How to convert Fahrenheit to Celsius
Type the temperature in °F
Any value works, including negatives like −4 °F.
Read the result in °C
Exact formula on every keystroke — no round numbers of thumb.
Flip for the other way
The swap button converts °C back to °F without losing the value.
FAQs about this conversion
What is normal body temperature in Celsius?
98.6 °F is exactly 37 °C. Values between about 36.1 and 37.2 °C (97–99 °F) are within the normal range.
Is 100 °F hot?
Yes — 100 °F is 37.8 °C, well into dangerous-heat territory in most climates. A useful anchor: body temperature is 98.6 °F, so 100 °F air feels like being wrapped in something warmer than skin.
Why minus 32 first?
Because Fahrenheit puts water’s freezing point at 32, not 0. The offset must be removed before the 5/9 ratio applies — doing it in the wrong order is the most common mental-math mistake.
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