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fahrenheit to celsius | Exact Decimal + Formula

1 Fahrenheit = -17.222222 Celsius

Fahrenheit to Celsius conversion is vital for understanding temperatures in metric countries, scientific reporting, and baking recipes.

About Fahrenheit and Celsius

Fahrenheit (°F)

The Fahrenheit scale sets 32°F at the freezing point and 212°F at the boiling point of water.

Where it's used: Everyday weather, cooking, and home thermostats in the United States, Bahamas, and Cayman Islands.

Celsius (°C)

The Celsius scale sets 0°C at the freezing point and 100°C at the boiling point of water at sea level.

Where it's used: Weather forecasts, cooking thermometers, and everyday temperatures in most of the world.

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Temperature Converter

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Formula

°C = (°F - 32) × 5/9

To convert Fahrenheit to Celsius, use the formula displayed above.

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Fahrenheit to Celsius: Quick Reference Table

Fahrenheit Celsius (Decimal) Fraction
0.001 °F -17.777222 °C -
0.01 °F -17.772222 °C -
0.1 °F -17.722222 °C -
0.5 °F -17.5 °C -
1 °F -17.222222 °C -
2 °F -16.666667 °C -
5 °F -15 °C -
10 °F -12.222222 °C -
25 °F -3.888889 °C -
50 °F 10 °C -
100 °F 37.777778 °C -
250 °F 121.111111 °C -
500 °F 260 °C -
1000 °F 537.777778 °C -

°F to °C Formula and Examples

Direct Formula °C = (°F - 32) × 5/9
Inverse Formula °F = °C × -0.058065
Mental Math Shortcut

Subtract 30 and half the Fahrenheit temperature for a quick mental estimate.

Precision & Practical Use

For example, 10 °F = -12.222222 °C.

Most thermometers read to 0.1°, and cooking recipes rarely need more than whole degrees. The exact values shown here are useful for science and engineering.

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Related Specialist Temperature Calculators & Niche Tools

Temperature conversions between Celsius (°C), Fahrenheit (°F), and Kelvin (K) are fundamental in science, but home cooking, baking, and professional catering require adjustments based on oven dynamics, sugar chemistry, and food safety standards.

When cooking, standard oven settings must be adjusted for convection fan ovens, which circulate heat faster and require a 20°C (25°F) reduction in temperature. Traditional recipes specifying Gas Marks require conversions to standard Celsius or Fahrenheit. Confectioners monitor candy temperature stages (soft ball, hard crack) to ensure correct sugar crystallization, while bakers track dough proofing temperatures to control yeast fermentation. Furthermore, internal meat temperatures are monitored and converted to ensure USDA-approved safety thresholds are met. These dedicated calculators translate thermal readings into culinary precision.

Related Reading

How to Convert Fahrenheit to Celsius

How many degrees celsius are in one fahrenheit?
One Fahrenheit (°F) equals -17.222222 Celsius (°C). To convert degrees fahrenheit to degrees celsius, multiply the fahrenheit value by -17.222222.
How do I convert Fahrenheit to Celsius?
Multiply your fahrenheit value by -17.222222 to get the result in Celsius: °C = °F × -17.222222. For example, 5 °F = -15 °C.
What is the formula for converting °F to °C?
The conversion formula is °C = °F × -17.222222. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.
Is there a quick mental estimate for °F to °C?
Subtract 30 and half the Fahrenheit temperature for a quick mental estimate.
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