What is the formula for Celsius to Fahrenheit?

F = C × 9/5 + 32. For example, 100°C = 100 × 1.8 + 32 = 212°F (the boiling point of water). The reverse is C = (F - 32) × 5/9.

What is Kelvin and when is it used?

Kelvin is the SI base unit of thermodynamic temperature. 0 K (absolute zero) is the coldest possible temperature. Kelvin is used in scientific contexts, physics, and chemistry. 0°C = 273.15 K.

At what temperature are Celsius and Fahrenheit equal?

Celsius and Fahrenheit are equal at -40°. This is because the two scales converge at that point: -40°C = -40°F.

Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin temperature scales.

Temperature

Unit

Celsius (°C)

100°C

Fahrenheit (°F)

212°F

Kelvin (K)

373.15K

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FAQ

What is the formula for Celsius to Fahrenheit?: F = C × 9/5 + 32. For example, 100°C = 100 × 1.8 + 32 = 212°F (the boiling point of water). The reverse is C = (F - 32) × 5/9.
What is Kelvin and when is it used?: Kelvin is the SI base unit of thermodynamic temperature. 0 K (absolute zero) is the coldest possible temperature. Kelvin is used in scientific contexts, physics, and chemistry. 0°C = 273.15 K.
At what temperature are Celsius and Fahrenheit equal?: Celsius and Fahrenheit are equal at -40°. This is because the two scales converge at that point: -40°C = -40°F.

The Temperature Converter accepts a temperature value and unit (Celsius, Fahrenheit, or Kelvin) and instantly shows all three equivalents. Uses standard conversion formulas: C=(F-32)×5/9, F=C×9/5+32, K=C+273.15. Results include copy buttons for each value.