How do I convert Kelvin to Celsius?

Subtract 273.15 from Kelvin to get Celsius. Formula: C = K - 273.15. Examples: 0K = -273.15C (absolute zero), 273.15K = 0C (freezing), 373.15K = 100C (boiling), 310K = 36.85C (body temp).

What is absolute zero in Celsius?

Absolute zero is 0 Kelvin = -273.15C = -459.67F. It is the theoretical lowest possible temperature where all thermal motion stops. Nothing in the observable universe reaches absolute zero, though scientists have cooled matter to within billionths of a degree of it.

What is room temperature in Kelvin?

Room temperature (approximately 20-25C) is about 293-298 Kelvin. Standard room temperature (20C) = 293.15K. Standard temperature in chemistry (25C, 77F) = 298.15K.

Why does the Kelvin scale start at absolute zero?

Kelvin is an absolute temperature scale - zero is not arbitrary like 0C (water freezing point) or 0F (brine freezing point), but represents the complete absence of thermal energy. This makes Kelvin ideal for scientific calculations, especially gas laws (PV = nRT), where negative temperatures would be nonsensical.

Kelvin to Celsius (K to °C) Converter

Also try: °C to K | °C to °F

Kelvin to Celsius — Formula & Reference

Kelvin (K) is the SI base unit for thermodynamic temperature. Zero Kelvin (0 K) is absolute zero. Everyday temperatures in Celsius are obtained by subtracting 273.15 from the Kelvin value.

Formula

°C = K − 273.15

Reference Values

Kelvin (K)	°C	Reference
0 K	−273.15	Absolute zero
273.15 K	0	Freezing point of water
293.15 K	20	Room temperature
373.15 K	100	Boiling point of water

Related Converters

°C → K °C → °F °F → °C KG → LBS L → gal

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Kelvin to Celsius (K to °C) Converter

Kelvin to Celsius — Formula & Reference

Formula

Reference Values

Related Converters

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