Convert Celsius to Fahrenheit

Temperature Conversion: Learn

The metric system uses the Celsius scale to measure temperature. However, temperatures are still measured on the Fahrenheit scale in the U.S.

Water freezes at 0° Celsius and boils at 100° Celsius, which is a difference of 100°. Water freezes at 32° Fahrenheit and boils at 212° Fahrenheit, which is a difference of 180°. Therefore each degree on the Celsius scale is equal to 180/100 or 9/5 degrees on the Fahrenheit scale.

How to convert Celsius temperatures to Fahrenheit:

Multiply the Celsius temperature by 9/5.
Add 32° to adjust for the offset in the Fahrenheit scale.

Example: Convert 37°C to Fahrenheit

37 * 9/5 = 333/5 = 66.6
66.6 + 32 = 98.6°F

There is also a mental math method to convert from Celsius to Fahrenheit. It is due to the ratio of 9/5 being equal to 1.8, and 1.8 is equivalent to 2 - 0.2.

How to convert Celsius temperatures to Fahrenheit with mental math:

Double the Celsius temperature and take one-tenth of the result (2 * 1/10 = .2)
Subtract that number from the original temperature
Add 32° to adjust for the offset in the Fahrenheit scale.

Example: Convert 37°C to Fahrenheit

37 * 2 = 74 and 74 * 1/10 = 7.4
74 - 7.4 = 66.6
66.6 + 32 = 98.6°F

Converting Temperature: Practice

Convert and round to the nearest degree.

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