Let's say it's 10 degrees Celsius outside. We want to know what that is in Fahrenheit. So, we use the formula: °F = (10 × 1.8) + 32 First, we multiply 10 by 1.8, which gives us 18. Then, we add ...

Celsius and Fahrenheit are two of the most common scales that people use to measure temperature. ... Conversion formulas. Celsius to Fahrenheit: Multiply by 9, divide by 5, then add 32 .