A physics problem says 300 K. What's that in Celsius?

300 K = 26.85°C. This is warm room temperature. In science, 298 K (25°C) is often used as 'standard conditions.'

My lab procedure says reactions occur at 500 K. Is that hot?

500 K = 226.85°C. Yes, that's hot. This is typical for metal melting, high-temperature synthesis, or industrial processes.

Can I just use Celsius instead of Kelvin in equations?

No. Equations involving ratios (like gas laws: PV = nRT) require absolute temperature. Kelvin ensures the math works; Celsius will give wrong answers.

I'm reading a scientific paper that gives temperature in Kelvin, but I want to understand it in Celsius—what's the quick way?

Just subtract 273.15 from the Kelvin value. For example, 298 K (a common reference in chemistry) is 25°C. Room temperature in papers is usually 293-298 K. For the reverse conversion, see [Celsius to Kelvin]({/temperature/celsius-to-kelvin/}).

Kelvin (K) to Celsius (C) Converter

Enter a value to instantly convert between temperature units.

From

Precision4 dp

1 Kelvin = -272.15 Celsius

Key Formulas

Celsius → Fahrenheit

°F = f(°C)

Fahrenheit → Celsius

°C = f(°F)

Celsius → Kelvin

K = f(°C)

Kelvin → Celsius

°C = f(K)

Formula

°C = K - 273.15

Kelvin to Celsius conversion is simple: subtract 273.15. This is useful when reading scientific papers, lab reports, or physics problems that use Kelvin but you want to understand the temperature in everyday terms.

Source: SI Brochure, 9th edition

Frequently Asked Questions

Real-World Examples

Freezing point of water. Reference point in thermodynamics and phase diagrams.

273.15 K = 0 °C

Standard lab temperature. Used as reference conditions in chemistry and material science.

298.15 K = 25 °C

Boiling point of water. Used in steam tables and thermal engineering calculations.

373.15 K = 100 °C

Normal human body temperature. Used in medical and biochemistry contexts.

310.15 K = 37 °C

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Kelvin (K) to Celsius (C) Converter

Key Formulas

Formula

Frequently Asked Questions

Real-World Examples

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