Convert Celsius to Fahrenheit
Celsius is set as the starting unit. Type a temperature and the Fahrenheit figure updates as you type.
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| Unit | Value |
|---|
Temperature is the category, with degrees Celsius as the starting unit and Fahrenheit as the target. The Fahrenheit result, the formula and the table of other temperature units all update as you type. The swap button reads Fahrenheit as the starting unit.
The formula is °F = °C × 9 ÷ 5 + 32. The +32 matters: 0 °C is 32 °F and 100 °C is 212 °F, so multiplying by 1.8 alone gives the wrong answer. For the other direction, use Fahrenheit to Celsius.
| °C | °F |
|---|---|
| -40 °C | -40 °F |
| -18 °C | -0.4 °F |
| 0 °C | 32 °F |
| 10 °C | 50 °F |
| 20 °C | 68 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 37 °C | 98.6 °F |
| 100 °C | 212 °F |
| 180 °C | 356 °F |
| 200 °C | 392 °F |
| 220 °C | 428 °F |
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
What is 37 °C in Fahrenheit?
37 °C is 98.6 °F. Multiply 37 by 9 to get 333, divide by 5 to get 66.6, then add 32.
Is −40 the same on both scales?
Yes. −40 °C is exactly −40 °F, the only point where the two readings match. The formula gives the same result there, so either scale works.
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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