Occasionally, you may need to convert a temperature in Celsius to Fahrenheit. If you are an American, most often it will be to find the outside temperature of a place just about everywhere else in the world that reports their temperatures in Celsius. This example problem shows the steps necessary to convert Celsius temperatures to the Fahrenheit scale.

**Example Problem:**

Dry ice, or frozen carbon dioxide sublimes (phase change between solid to gas) at -78.5 °C under normal atmospheric pressures. What is this temperature in Fahrenheit?

**Solution:**

The formula needed to convert Celsius to Fahrenheit is:

°F = ^{9}⁄_{5}°C + 32

where °F and °C are the temperatures in Fahrenheit and Celsius respectively.

To solve this, plug the celsius temperature, -78.5 °C into the formula.

°F = ^{9}⁄_{5}(-78.5) + 32

°F = -141.3 + 32

°F = -109.3 °F

**Answer:**

Dry ice sublimes at -109.3 °F under normal atmospheric pressure.

For more help, try these other temperature conversion example problems:

Convert Fahrenheit to Celsius Example Problem

When Does Fahrenheit Equal Celsius?

Convert Celsius to Kelvin Example Problem

Convert Kelvin to Celsius Example Problem