Fahrenheit to Celsius

Convert Fahrenheit to Celsius temperature instantly.

How to Use

1

Enter the Fahrenheit temperature

Type the temperature in °F. Supports negative numbers and decimals.

2

View the Celsius result

The °C equivalent appears instantly using °C = (°F - 32) × 5/9.

3

Apply the result

Use the °C value for international communication, metric equipment, or recipe following.

4

Convert more temperatures

Enter additional Fahrenheit values for further conversions.

How to convert Fahrenheit to Celsius

Subtract 32 from the Fahrenheit temperature and multiply by 5/9 (or divide by 1.8) to get Celsius.

Formula

°C = (°F - 32) × 5/9

Common Temperature Conversions

  • 32°F = 0°C (water freezes)
  • 68°F = 20°C (room temperature)
  • 98.6°F = 37°C (body temperature)
  • 212°F = 100°C (water boils)

Frequently Asked Questions

Which countries use Fahrenheit?

The United States, Bahamas, Belize, Cayman Islands, Palau, and some Caribbean nations use Fahrenheit. Most of the world uses Celsius.

Is there a quick mental math trick for conversion?

For rough conversions: subtract 30 from Fahrenheit and divide by 2. This gives a close approximation. For 68°F: (68-30)÷2 = 19°C (actual is 20°C).

Real-World Examples & Use Cases

Decoding US Weather Reports While Traveling

American weather services, hotel room thermostats, and local US radio stations broadcast temperatures in Fahrenheit. International visitors from metric countries need to understand what 85°F (29.4°C) means for outdoor comfort, or what 28°F (-2.2°C) means for ice risk on the roads. This conversion is essential for travelers planning activities, selecting appropriate clothing, and assessing local conditions. National Weather Service alerts and extreme weather warnings issued in Fahrenheit become meaningful once converted to familiar Celsius values.

American Cooking Recipes & Oven Temperatures

American recipes and most US food content specify oven temperatures in Fahrenheit. International cooks with Celsius ovens must convert these settings to bake and roast correctly. Baking cookies at 350°F requires setting your oven to 176.7°C. Roasting chicken at 425°F is 218.3°C. Incorrect oven temperature conversion results in underbaked or burnt food. US cooking YouTube channels, food blogs, and recipe apps are widely followed internationally, making Fahrenheit-to-Celsius conversion a daily need for many non-American home cooks.

US Product & Equipment Specifications

American-manufactured products — from industrial equipment to household appliances — often specify operating temperature ranges in Fahrenheit. Electronics rated for operation up to 140°F (60°C), or freezers specified to maintain 0°F (-17.8°C), require conversion for international buyers and operators. Industrial equipment installation guides, automotive specifications (engine operating temperatures in Fahrenheit), and safety data sheets for chemicals warehoused in the US use Fahrenheit temperature ranges that metric-trained engineers must convert.

Medical Temperature Reporting

American clinical thermometers and body temperature references use Fahrenheit. A fever reading of 101.3°F is 38.5°C in metric medical terminology. International caregivers, travelers who become ill in the US, or parents reading US pediatric guidelines need to convert Fahrenheit body temperature values to Celsius for comparison with international fever thresholds and medical standards. Remote consultations between US doctors and international patients also require clear temperature unit communication.

How It Works

The Fahrenheit-to-Celsius conversion reverses the Celsius-to-Fahrenheit formula, addressing both the offset and scale difference between the two temperature systems. The conversion formula: °C = (°F - 32) × 5/9 Step-by-step breakdown: 1. Subtract 32: Remove the offset. Fahrenheit defines water freezing at 32°; subtracting it brings the scale to a water-freezing baseline of 0°. 2. Multiply by 5/9 (= 0.5556): Apply the scale factor. Fahrenheit uses 180 graduations between freezing and boiling; Celsius uses 100. The ratio 100/180 = 5/9 rescales the interval. Equivalent form: °C = (°F - 32) ÷ 1.8 Key reference conversions: - 32°F = 0°C (freezing point) - 68°F = 20°C (comfortable room) - 98.6°F = 37°C (body temperature) - 212°F = 100°C (boiling point)

Frequently Asked Questions

What is 32°F in Celsius?▼
32°F equals 0°C — the freezing point of water. Using the formula: (32 - 32) × 5/9 = 0°C. This is the reference temperature where water transitions between liquid and solid at standard atmospheric pressure.
What is 98.6°F in Celsius?▼
98.6°F equals 37°C — normal human body temperature. A fever is considered to begin at 100.4°F (38°C). This conversion is critical for international health assessment when using American thermometers.
What is 350°F in Celsius?▼
350°F equals 176.7°C. This is a common baking temperature in American recipes used for cookies, cakes, and casseroles. International bakers converting from American recipes need to set their celsius ovens to approximately 175-177°C.
What is 70°F in Celsius?▼
70°F equals 21.1°C — a comfortable indoor temperature. (70 - 32) × 5/9 = 38 × 5/9 = 21.1°C. This is the typical 'room temperature' set by American thermostats during autumn and spring months.
What is a quick estimate method for °F to °C?▼
Subtract 30 and divide by 2 for a quick rough estimate. Example: 78°F → (78-30)/2 = 24°C (actual 25.6°C). More accurate: subtract 32 and divide by 1.8. Dead accurate: use the exact formula (°F - 32) × 5/9.
Why does the US use Fahrenheit?▼
Fahrenheit was the dominant temperature scale in English-speaking countries before Celsius was internationally standardized. The US maintained Fahrenheit due to established infrastructure, cultural familiarity, and the economic cost of conversion. Daniel Gabriel Fahrenheit introduced the scale in 1724, over 40 years before Anders Celsius developed the centigrade scale in 1742.

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