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Fahrenheit to Celsius Converter

Convert Fahrenheit to Celsius instantly with our accurate calculator. Perfect for weather, recipes, and international use.

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Body Temperature

Convert normal human body temperature from Celsius to Fahrenheit

Key values: 37 °C · to °F · = 98.6 °F

Baking Conversion

Convert a common baking temperature from Fahrenheit to Celsius

Key values: 350 °F · to °C · = 176.67 °C

Absolute Zero

Convert absolute zero from Kelvin to Celsius

Key values: 0 K · to °C · = -273.15 °C

Documentation

The Conversion Formula

C = \frac{5}{9}(F - 32)

Subtract 32 to remove the offset, then multiply by $\frac{5}{9}$ to scale from Fahrenheit-sized degrees to Celsius-sized degrees.

Common Conversions

Fahrenheit	Celsius	Context
32°F	0°C	Freezing point
50°F	10°C	Cool day
68°F	20°C	Room temperature
77°F	25°C	Warm day
98.6°F	37°C	Body temperature
212°F	100°C	Boiling point
350°F	177°C	Standard baking
450°F	232°C	Pizza oven

Quick Mental Estimate

Subtract 30 and divide by 2 for a fast approximation:

72°F \approx \frac{72 - 30}{2} = 21°C \quad (\text{actual: } 22.2°C)

This “subtract 30, halve” method works well for everyday weather temperatures (40–100°F). The error grows outside this range.

History of the Fahrenheit Scale

Daniel Gabriel Fahrenheit (1724) defined three reference points: 0°F for a brine ice mixture (the coldest he could reliably produce), 32°F for ice water, and 96°F for body temperature (later corrected to 98.6°F). His scale gave finer granularity for weather — a useful feature before decimal fractions were common.

Where Fahrenheit is still used: The United States, its territories, and a handful of Caribbean nations. The rest of the world uses Celsius. Scientific contexts worldwide use Celsius or Kelvin.

Frequently Asked Questions

What is the formula to convert Fahrenheit to Celsius?

Subtract 32 from the Fahrenheit temperature, then multiply by $\frac{5}{9}$ . The formula is $C = \frac{5}{9}(F - 32)$ . For example, $72^\circ F = \frac{5}{9} \times (72 - 32) = 22.2^\circ C$ .

How can I quickly estimate Fahrenheit to Celsius in my head?

Subtract 30 and divide by 2. For example, $72^\circ F$ becomes roughly $\frac{72 - 30}{2} = 21^\circ C$ (actual: $22.2^\circ C$ ). This method works well for everyday weather temperatures between $40^\circ F$ and $100^\circ F$ .

What is 98.6 F in Celsius?

Normal human body temperature of $98.6^\circ F$ equals $37^\circ C$ . This is one of the most commonly converted reference points and is useful as a quick sanity check for your conversions.

Why was the Fahrenheit scale originally created?

Daniel Gabriel Fahrenheit created the scale in 1724 with three reference points: $0^\circ F$ for a brine ice mixture, $32^\circ F$ for ice water, and $96^\circ F$ for body temperature (later corrected to $98.6^\circ F$ ). The finer granularity was useful before decimal fractions were common.

What is the standard oven temperature in Celsius?

$350^\circ F$ , a common baking temperature, equals approximately $177^\circ C$ . A hot pizza oven at $450^\circ F$ equals about $232^\circ C$ . Many cookbooks provide both values for international readers.