Convert Fahrenheit to Celsius
Fahrenheit is set as the starting unit. Type a temperature and the Celsius figure appears as you type.
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| Unit | Value |
|---|
This page opens the temperature category with Fahrenheit as the starting unit and Celsius as the target. Type a reading and the Celsius result, the formula and the table of other units are worked out as you type.
The formula is °C = (°F − 32) × 5 ÷ 9, so subtract 32 first. 350 °F is about 176.67 °C, and 98.6 °F is 37 °C. For the reverse direction, see Celsius to Fahrenheit.
| °F | °C |
|---|---|
| -40 °F | -40 °C |
| 0 °F | -17.7778 °C |
| 32 °F | 0 °C |
| 50 °F | 10 °C |
| 68 °F | 20 °C |
| 72 °F | 22.2222 °C |
| 98.6 °F | 37 °C |
| 212 °F | 100 °C |
| 325 °F | 162.78 °C |
| 350 °F | 176.67 °C |
| 400 °F | 204.44 °C |
| 450 °F | 232.22 °C |
How to convert units
- Pick a category, such as length or volume.
- Type the value and choose the unit it is in.
- Read the answer, or scan the table for every other unit.
Questions
Why is my Celsius answer negative?
Any Fahrenheit reading below 32 gives a negative Celsius figure, because 32 °F is 0 °C. The value −40 °F is also −40 °C, so the formula gives the same figure there.
How do I check a Fahrenheit figure by hand?
For 50 °F, subtract 32 to get 18, multiply by 5 to get 90, then divide by 9. The answer is 10 °C.
How do I convert miles to kilometres?
Multiply the miles by 1.609344. A mile is exactly 1,609.344 metres, so 10 miles is 16.09344 km.
Why are US and UK gallons different?
A US gallon is 3.785411784 litres and a UK (imperial) gallon is 4.54609 litres. The UK gallon is about 20% bigger, so the same volume is a smaller number of UK gallons.
What is the difference between KB and KiB?
A kilobyte (KB) is 1,000 bytes and a kibibyte (KiB) is 1,024 bytes. Some operating systems show binary sizes with the decimal label, so a 1 TB drive can be reported as about 931 GB.
Is a cup 236.6 ml or 240 ml?
Both are used. The US customary cup is 236.6 ml, or 8 US fluid ounces. Nutrition labels use a 240 ml cup, which is about 1.4% larger, so check which one a recipe means.
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