Fahrenheit to Celsius (°F to °C)
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Common Conversions
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40 | -40.0000 |
| -20 | -28.8889 |
| 0 | -17.7778 |
| 10 | -12.2222 |
| 20 | -6.6667 |
| 32 | 0 |
| 40 | 4.4444 |
| 50 | 10.0000 |
| 60 | 15.5556 |
| 70 | 21.1111 |
| 72 | 22.2222 |
| 80 | 26.6667 |
| 90 | 32.2222 |
| 98.6 | 37.0000 |
| 100 | 37.7778 |
| 120 | 48.8889 |
| 150 | 65.5556 |
| 200 | 93.3333 |
| 350 | 176.67 |
| 500 | 260.00 |
What Is Fahrenheit TO Celsius?
To convert Fahrenheit to Celsius, subtract 32 from the Fahrenheit temperature and then multiply by 5/9 (approximately 0.5556). The formula is °C = (°F - 32) x 5/9. For example, 72 °F converts to about 22.22 °C because (72 - 32) x 5/9 = 22.22. This conversion is frequently needed when Americans travel abroad, read international scientific literature, or follow global weather forecasts. Most of the world uses Celsius, which is part of the International System of Units (SI). A typical comfortable room temperature of 68-72 °F corresponds to 20-22 °C. In cooking, American recipes often list Fahrenheit oven temperatures such as 350 °F (about 177 °C) or 425 °F (about 218 °C), and anyone using a metric oven needs to convert these values. Medical professionals working across borders also encounter this conversion regularly, since a fever of 100.4 °F is exactly 38 °C. The Fahrenheit scale has finer granularity than Celsius — one Fahrenheit degree is only about 0.556 Celsius degrees — which some argue gives more precision for everyday temperatures without using decimals. Regardless, being able to convert between these two scales remains one of the most commonly needed unit conversions worldwide.
Formula
The Fahrenheit-to-Celsius formula is °C = (°F - 32) x 5/9. First, subtract 32 from the Fahrenheit value. This removes the offset between the two scales — water freezes at 32 °F but at 0 °C, so subtracting 32 re-centers the scale around the Celsius zero point. Second, multiply by 5/9 (approximately 0.5556). This rescales the degrees because each Celsius degree is 9/5 the size of a Fahrenheit degree. Worked example: to convert 98.6 °F (normal body temperature), compute 98.6 - 32 = 66.6, then 66.6 x 5/9 = 37.0 °C. For a quick mental estimate, subtract 30 and divide by 2. For 98.6 °F that gives (98.6 - 30) / 2 = 34.3 °C — not exact, but useful for rough estimates on the go.
Best For:
- Translating US weather forecasts into Celsius for international audiences
- Converting American baking temperatures to metric oven settings
- Interpreting fever readings from Fahrenheit thermometers in countries that use Celsius
- Adjusting industrial process temperatures specified in Fahrenheit for metric documentation
- Understanding US HVAC settings when installing systems in metric countries
How to Fahrenheit TO Celsius
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