Celsius to Fahrenheit
Convert a temperature from Celsius to Fahrenheit.
Live Calculator
MembersVariables
Example
20°C = 68°F
How it works
This formula converts a temperature measured on the Celsius scale into the Fahrenheit scale. The factor 9/5 adjusts for the different size of the two degree intervals, and the +32 shifts the value because the two scales start at different zero points. In other words, Fahrenheit degrees are smaller and the freezing point of water is set at 32°F instead of 0°C.
When to use it
Use it when you need to read or compare temperatures from countries or resources that use different temperature scales. It is common in weather, cooking, science classes, and any problem that gives a temperature in Celsius but asks for Fahrenheit.
Worked example, step by step
Convert 25°C to Fahrenheit Step 1: Start with the formula: °F = °C × 9/5 + 32 Step 2: Substitute 25 for °C: °F = 25 × 9/5 + 32 Step 3: Multiply: 25 × 9/5 = 45 Step 4: Add 32: 45 + 32 = 77 Answer: 25°C = 77°F
Common mistakes to avoid
- Forgetting to add 32 after multiplying
- Multiplying by 5/9 instead of 9/5
- Using the formula in reverse when trying to convert Fahrenheit to Celsius
Did You Know?
The Celsius and Fahrenheit scales cross at a single point: −40° reads the same on both.
Share this formula
More in Unit Conversions
View allFahrenheit to Celsius
BasicConvert a temperature from Fahrenheit to Celsius.
Celsius to Kelvin
BasicConvert Celsius to the absolute Kelvin scale.
Kelvin to Celsius
BasicConvert Kelvin to Celsius.
Kilometers to Miles
BasicConvert kilometers to miles.
Miles to Kilometers
BasicConvert miles to kilometers.
Meters to Feet
BasicConvert meters to feet.