Fahrenheit to Celsius Converter

Type a temperature in degrees Fahrenheit to see it in Celsius and in Kelvin.

Updated October 27, 2026

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Formula

°C = (°F - 32) × 5 ÷ 9

K = °C + 273.15

Worked example

70 °F: 70 - 32 = 38, and 38 × 5 ÷ 9 = 21.1111 °C. In Kelvin that is 21.1111 + 273.15 = 294.2611 K.

Fahrenheit	Celsius	Kelvin
-40	-40	233.15
32	0	273.15
70	21.1111	294.2611
98.6	37	310.15
212	100	373.15

Frequently asked questions

How do you convert Fahrenheit to Celsius?

Subtract 32, then multiply by 5 and divide by 9. For 70 °F: 70 - 32 = 38, × 5 ÷ 9 = 21.11 °C.

What is 98.6 Fahrenheit in Celsius?

98.6 °F is exactly 37 °C: (98.6 - 32) × 5 ÷ 9 = 37.

What is a quick way to estimate Celsius from Fahrenheit?

Subtract 30 and halve it. For 70 °F that gives 20 °C, close to the exact 21.1 °C.

How do I convert Fahrenheit to Kelvin?

Convert to Celsius, then add 273.15. 212 °F is 100 °C, which is 373.15 K. The lowest possible value is -459.67 °F, or 0 K.

How we calculate

Fahrenheit to Celsius Converter

Formula

Worked example

Frequently asked questions

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