Fahrenheit to Celsius Converter Formula

Understand the math behind the fahrenheit to celsius converter. Each variable explained with a worked example.

Use the Fahrenheit to Celsius Converter

Formulas Used

Celsius

celsius = (fahrenheit - 32) * 5/9

Variables

VariableDescriptionDefault
fahrenheitFahrenheit(°F)72

How It Works

How to Convert Fahrenheit to Celsius

Formula

°C = (°F - 32) × 5/9

Subtract 32 from the Fahrenheit temperature, then multiply by 5/9 to get the Celsius equivalent.

Worked Example

Convert 72°F to Celsius.

fahrenheit = 72
  1. 01°C = (72 - 32) × 5/9
  2. 02°C = 40 × 0.5556
  3. 03°C = 22.22°C

Frequently Asked Questions

What is the formula for Fahrenheit to Celsius?

Subtract 32, then multiply by 5/9 (or divide by 1.8). The formula is °C = (°F - 32) × 5/9.

What is 32°F in Celsius?

32°F is 0°C, the freezing point of water.

Learn More

Guide

How to Convert Temperature: Celsius, Fahrenheit, and Kelvin

Learn how to convert between Celsius, Fahrenheit, and Kelvin with clear formulas, worked examples, and practical tips for everyday and scientific use.

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