Fahrenheit to Celsius Converter

Temperature conversion workspace

Enter a decimal, fraction or quick calculation — for example 12.5, 3/8 or (12*4)+6.5.

Batch conversionconvert up to 100 values at once

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Compare all temperature units

One input, every supported equivalent. Select any row as the main target.

4 units
Equivalent temperature values in every supported unit
UnitEquivalentTarget action
Celsius °C-17.78Target
Fahrenheit °F0Source
Kelvin K255.37
Rankine °R459.67

Use this Fahrenheit-to-Celsius reference when interpreting weather, cooking and everyday temperatures reported on the other scale.

Curated reference

Formula

°C = (°F − 32) × 5/9

Calculations use the central unit catalog and preserve precision until the result is formatted.

Reference conversions

Fixed reference values use en-US formatting and up to 12 significant digits.

Fahrenheit to Celsius example conversions
InputFromToResult
-40FahrenheitCelsius-40
32FahrenheitCelsius0
68FahrenheitCelsius20
98.6FahrenheitCelsius37
212FahrenheitCelsius100

Related temperature conversions

Curated references with worked examples, formulas and the full interactive converter.

View all temperature units
Celsius to Fahrenheit

Frequently asked questions

How do I convert fahrenheit to celsius?

Use °C = (°F − 32) × 5/9. Enter a value in the calculator to keep full numeric precision until the result is formatted.

What is 1 °F in °C?

1 °F equals -17.2222222222 °C.

Are the displayed results rounded?

The conversion uses the sourced catalog definitions and retains full JavaScript number precision until display formatting is applied.

Accuracy & transparency

Sources & methodology

Calculations keep full numeric precision until display formatting. These references describe the definitions, variants or factors used; links do not imply affiliation.

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