Fahrenheit to Celsius Converter

🧭 How to Use the Fahrenheit to Celsius Converter

This free Fahrenheit to Celsius converter converts temperatures from degrees Fahrenheit (°F) to degrees Celsius (°C). You only need one temperature value.

1 Enter the Fahrenheit Temperature

Type the temperature you want to convert into the Fahrenheit field. You can enter positive values, negative temperatures and decimals such as 98.6°F.

2 Convert to Celsius

Select Convert to Celsius. The calculator subtracts 32 from the Fahrenheit value and multiplies the result by 5/9.

3 Read the Result

The converted temperature appears in degrees Celsius. You can change the Fahrenheit value and calculate again whenever you need another conversion.

ƒ Fahrenheit to Celsius Formula

Fahrenheit and Celsius use different zero points and different degree sizes, so converting between them requires both subtraction and multiplication.

68 Example: Convert 68°F to Celsius

Start with 68°F.

First subtract 32:

Then multiply 36 by 5/9:

🌡 Fahrenheit to Celsius Conversion Chart

The table below shows several useful Fahrenheit temperatures and their Celsius equivalents.

The boiling point of water varies with atmospheric pressure and therefore with altitude. The familiar 212°F / 100°C reference applies at standard atmospheric pressure.

⇄ Fahrenheit vs Celsius

Fahrenheit and Celsius are two temperature scales used to express the same physical quantity, but their degree sizes and reference points are different.

On the Celsius scale, water freezes at approximately 0°C and boils at approximately 100°C at standard atmospheric pressure.

On the Fahrenheit scale, the corresponding values are 32°F and 212°F.

This difference is why simply adding or subtracting one fixed number is not enough to convert between the scales. The conversion also requires the 5/9 or 9/5 scale factor.

−40 Why Is −40°F Equal to −40°C?

Fahrenheit and Celsius have one temperature at which their numerical values are identical:

You can verify this using the Fahrenheit-to-Celsius formula:

This makes −40 a useful reference point when comparing the two temperature scales.

🎯 When Is Fahrenheit to Celsius Conversion Useful?

Temperature conversion is useful whenever information is provided in a different temperature scale from the one you normally use.

• Comparing weather forecasts from different countries.
• Converting cooking or oven temperatures.
• Working with school and science exercises.
• Reading product instructions or equipment specifications.
• Comparing international temperature information.
• Understanding travel weather and climate information.
• Checking engineering or technical documents that use another scale.

If you need to perform the opposite conversion, use the Celsius to Fahrenheit Converter .

✓ Conversion Accuracy and Rounding

The Fahrenheit-to-Celsius formula itself is exact. However, a converted decimal may be rounded when it is displayed.

For example:

For ordinary weather or household use, one or two decimal places are usually sufficient. Technical work may require a specific precision defined by the applicable procedure, specification or standard.

This converter retains useful decimal precision while avoiding unnecessarily long displayed numbers.

⚡ Why Use ToolZippy’s °F to °C Converter?

ToolZippy’s Fahrenheit to Celsius Converter is designed for one specific job: converting a Fahrenheit temperature into Celsius quickly and clearly. The page includes the formula, calculation examples and common reference temperatures so you can understand the result as well as calculate it.

The conversion is designed to run directly in your browser, and no account is required. You can enter another value and recalculate whenever needed.

Browse the Converters directory for more length, weight, temperature, area, volume, digital storage and time conversion tools.