Fahrenheit to Celsius Converter

1. Enter the temperature in Fahrenheit that you want to convert.
2. The equivalent temperature in Celsius appears instantly.
3. Use the copy button to copy the Celsius value to your clipboard.
4. Use the conversion table below to look up common Fahrenheit-to-Celsius values.

What is Fahrenheit to Celsius Conversion?

Fahrenheit to Celsius conversion transforms temperature readings from the scale used primarily in the United States to the metric scale used by the rest of the world. The Fahrenheit scale was developed by Daniel Gabriel Fahrenheit in 1724 and originally used the freezing point of a brine solution as its zero reference. The Celsius scale, designed by Anders Celsius in 1742, uses water's freezing point (0°C) and boiling point (100°C) as its reference points, making it more intuitive for scientific and everyday use.

The Conversion Formula Explained

The formula is: °C = (°F - 32) x 5/9. This reverses the Celsius-to-Fahrenheit conversion in two steps. First, subtract 32 to remove the offset between the two scales' zero points (water freezes at 32°F but 0°C). Then multiply by 5/9 (or divide by 1.8) to scale from Fahrenheit degree increments to Celsius degree increments. The Fahrenheit scale uses 180 degrees between water's freezing and boiling points, while Celsius uses 100 degrees, giving the 5/9 ratio. For quick mental math, subtract 30 from the Fahrenheit value and divide by 2 for a rough estimate. For example, 80°F: (80 - 30) / 2 = 25°C (the exact answer is 26.7°C).

Common Use Cases

• Reading US weather forecasts and converting to Celsius for context
• Converting American oven temperatures for metric recipes
• Understanding medical temperature readings from US healthcare providers
• Interpreting thermostat and HVAC settings when traveling in the US
• Converting climate and environmental data between measurement systems
• Comparing weather conditions between US and international locations

Why Fahrenheit Has More Granularity

One advantage of the Fahrenheit scale is its finer granularity for everyday temperatures. With 180 degrees between water's freezing and boiling points (compared to 100 in Celsius), each Fahrenheit degree represents a smaller temperature change. This means you can describe weather temperatures with whole numbers and still have good precision. The range from 0°F to 100°F roughly corresponds to the range of outdoor temperatures experienced in most populated areas of the United States, which may be why the scale persists in everyday American usage despite the scientific community's universal adoption of Celsius. Key reference points to remember: 32°F = 0°C (water freezes), 72°F = 22.2°C (comfortable room temperature), 98.6°F = 37°C (body temperature), and 212°F = 100°C (water boils).

For the reverse conversion, use the Celsius to Fahrenheit Converter. For other unit conversions, try the Unit Converter. For converting between measurement systems, see the Kilometers to Miles Converter.