How do I convert Celsius to Fahrenheit?

Multiply by 9/5 and add 32: F = C x 9/5 + 32. For example, 25 C is 77 F.

How do I convert Fahrenheit to Celsius?

Subtract 32 and multiply by 5/9: C = (F - 32) x 5/9. For example, 98.6 F is 37 C.

What is absolute zero?

Absolute zero is 0 K, which equals -273.15 C or -459.67 F. It is the lowest temperature possible, so any value below it is physically impossible.

At what temperature are Celsius and Fahrenheit equal?

At -40 degrees: -40 C is exactly -40 F.

Temperature Converter: Celsius, Fahrenheit, Kelvin

Degrees temperature conversions for Kelvin, Celsius, Fahrenheit, Rankine, Delisle, Newton, Réaumur, and Rømer.

About Temperature Converter

Convert a temperature between Celsius, Fahrenheit, Kelvin, Rankine, Delisle, Newton, Reaumur and Romer. Type into any scale and the others update; every conversion goes through Kelvin at full precision and you choose how many decimal places to show. Values below absolute zero are flagged, and one-click reference points cover freezing, room, body and boiling temperatures.

Common uses

Convert an oven or weather temperature between Celsius and Fahrenheit
Convert Kelvin readings from science or engineering data
Look up historical scales like Reaumur or Delisle

FAQ

How do I convert Celsius to Fahrenheit?: Multiply by 9/5 and add 32: F = C x 9/5 + 32. For example, 25 C is 77 F.
How do I convert Fahrenheit to Celsius?: Subtract 32 and multiply by 5/9: C = (F - 32) x 5/9. For example, 98.6 F is 37 C.
What is absolute zero?: Absolute zero is 0 K, which equals -273.15 C or -459.67 F. It is the lowest temperature possible, so any value below it is physically impossible.
At what temperature are Celsius and Fahrenheit equal?: At -40 degrees: -40 C is exactly -40 F.