Fahrenheit to Celsius Converter

Convert Fahrenheit (°F) to Celsius (°C) instantly using this accurate temperature conversion tool. Enter any value to get the exact equivalent with formulas, examples, conversion charts, and practical temperature references.

From
To
-17.7778
Try:
Step-by-step°F°C
1°C = (°F − 32) × 5/9formula
2°C = (0 − 32) × 5/9substitute
3°C = -32 × 5/9subtract
4°C = -17.7778result
URLiunitconverter.com/temperature/0-fahrenheit-to-celsiusOpen
0 °F in every unit
°C
Celsius
water freezes at 0°C
-17.78 °C
°F
Fahrenheit
water freezes at 32°F
0 °F
K
Kelvin
absolute zero = 0 K
255.37 K
°R
Rankine
absolute zero = 0 °R
459.67 °R
°Ré
Réaumur
water freezes at 0°Ré
-14.22 °Ré

Fahrenheit to Celsius Formula

To convert Fahrenheit (°F) to Celsius (°C), use the following formula:

°C = (°F − 32) × 5/9

The formula keeps full precision during the calculation and rounds only the displayed result when needed. For example, 25 °F converts to -3.89 °C.

Key Temperature References

Fahrenheit (°F)Celsius (°C)Reference
32 °F0 °CFreezing point of water
68 °F20 °CRoom temperature
98.6 °F37 °CAverage body temperature
212 °F100 °CBoiling point of water

How to Convert Fahrenheit to Celsius (°F to °C)

Follow these simple steps:

  1. Take the temperature in Fahrenheit. Example: 25 °F
  2. Apply the formula °C = (°F − 32) × 5/9.
  3. The result is 25 °F = -3.89 °C.

Another Quick Example

0 °F-17.78 °C
20 °F-6.67 °C
30 °F-1.11 °C
40 °F4.44 °C

For instant conversions, use the converter above to calculate temperatures automatically with full accuracy.

Common Fahrenheit to Celsius Conversions

The table below shows frequently searched conversions, grouped by use case.

Fahrenheit (°F)Celsius (°C)What It Feels Like
🌨️ Cold & Freezing
-40 °F-40 °CExtreme Cold
-4 °F-20 °CVery Cold
14 °F-10 °CBelow Freezing
32 °F0 °CFreezing Point
🌤️ Cool & Mild Weather
41 °F5 °CCold Morning
50 °F10 °CCool
59 °F15 °CMild
68 °F20 °CRoom Temperature
☀️ Warm & Hot Weather
77 °F25 °CWarm Day
86 °F30 °CHot Summer Day
95 °F35 °CVery Hot
104 °F40 °CExtreme Heat
🩺 Body Temperature
98.6 °F37 °CNormal Body Temperature
100.4 °F38 °CLow-Grade Fever
102.2 °F39 °CFever
104 °F40 °CHigh Fever
🍳 Cooking Temperatures
122 °F50 °CVery Warm / Poaching
167 °F75 °CHot Liquid / Steep
212 °F100 °CBoiling Point

Quick Fahrenheit to Celsius Conversion

The Fahrenheit to Celsius converter helps quickly convert values into the Celsius scale.

32 °F=0 °C
68 °F=20 °C
77 °F=25 °C
98.6 °F=37 °C
212 °F=100 °C

Practical Uses

This conversion tool is widely used across several sectors, including:

🌤️

Weather Forecasting & MeteorologyEssential for analyzing global climate patterns, converting international satellite data, and presenting regional weather reports across different standard metrics.

🍳

Cooking, Baking & Culinary ArtsA vital tool for chefs and home cooks adjusting oven temperatures, candy-making thresholds, or sous-vide settings when working with foreign cookbooks and international recipes.

🔬

Scientific Research & LaboratoriesUsed by researchers and students to seamlessly convert data during chemical reactions, thermodynamic studies, and physical state experiments that require strict adherence to global scientific standards.

🩺

Medical & Healthcare ReadingsHelps medical professionals accurately evaluate patient charts, monitor body temperature fluctuations, and safely administer treatments when dealing with medical equipment or documentation from different regions.

🏗️

HVAC & Building EngineeringCrucial for heating, ventilation, and air conditioning technicians calculating thermal loads, configuring smart thermostats, and installing climate control systems with varying manufacturer specs.

🏭

Manufacturing & Industrial ProcessesVital for monitoring machinery operating limits, managing heat-treatment cycles, and ensuring product quality control across global supply chains.

✈️

International Travel & AviationIdeal for global travelers, pilots, and logistics managers adjusting to local climate reports, checking baggage storage requirements, or planning activities based on regional temperature standards.

Understanding Fahrenheit and Celsius

Fahrenheit (°F) and Celsius (°C) are temperature scales used in different regions and fields. While both measure temperature, they use different reference points.

What Is Fahrenheit (°F)?

Fahrenheit is a temperature scale primarily used in the United States and a few other regions.

Why Fahrenheit is still used

  • Water freezes at 32°F
  • Water boils at 212°F
  • Commonly used in U.S. weather reports and household thermometers
  • Frequently appears in American cooking and baking instructions

Many people find Fahrenheit useful for describing everyday weather conditions because it provides more temperature intervals between common outdoor temperatures.

What Is Celsius (°C)?

Celsius is the standard temperature scale used in most countries and is part of the metric system.

Why Celsius is popular

  • Water freezes at 0°C
  • Water boils at 100°C
  • Widely used in weather forecasts, education, and scientific research
  • Official temperature scale in most countries worldwide

Because it is based on simple, easy-to-understand reference points, Celsius is commonly used for everyday temperature measurements.

Fahrenheit vs Celsius: Key Differences

FeatureFahrenheit (°F)Celsius (°C)
Water Freezes32°F0°C
Water Boils212°F100°C
Primary UsageUnited StatesMost countries
Scientific UseRarely usedStandard scale
Weather ForecastsCommon in U.S.Global standard

When Do You Need to Convert Between Them?

Converting Fahrenheit to Celsius is useful when:

  • Checking weather forecasts from another country
  • Following international cooking recipes
  • Reading scientific or educational materials
  • Traveling between regions that use different temperature scales
  • Comparing body temperature readings from different sources

Quick Reference: Common Temperature Points

Familiar reference points across the Fahrenheit and Celsius scales.

ReferenceFahrenheit (°F)Celsius (°C)
Absolute Zero-459.67 °F-273.15 °C
Freezing Point of Water32 °F0 °C
Room Temperature68 °F20 °C
Average Body Temperature98.6 °F37 °C
Boiling Point of Water212 °F100 °C

Popular Fahrenheit to Celsius Conversions

Most searched °F to °C conversions — open any value for a dedicated page with a step-by-step calculation.

Frequently Asked Questions

What is the formula to convert Fahrenheit to Celsius?
The formula is °C = (°F − 32) × 5/9. You can also multiply the Fahrenheit value by 1.8 and then add 32 to get the same result.
What is 0 Fahrenheit in Celsius?
0 °F equals -17.78 °C.
What is 100 Fahrenheit in Celsius?
100 °F equals 37.78 °C.
What is the "quick rule" for Fahrenheit to Celsius in your head?
For a fast mental estimate, subtract 30 and halve the value. For example, 70°F: (70 − 30) ÷ 2 = 20°C. This is an approximation; the precise answer is 21.1°C.
At what temperature are Celsius and Fahrenheit equal?
Celsius and Fahrenheit are exactly equal at −40 degrees (−40°C = −40°F).
Why are there different temperature scales?
Different scales were developed in different eras and regions. Celsius is part of the metric system used by nearly every country, Fahrenheit is used mainly in the United States, and Kelvin is the scientific standard that starts at absolute zero.