Kelvin to Celsius (K to °C) Converter
Use this Kelvin to Celsius converter to quickly convert K to °C with accurate results. Enter a Kelvin value, adjust your preferred decimal precision, and get the equivalent Celsius temperature instantly.
This K to °C calculator uses the exact conversion formula of °C = K − 273.15, giving you precise results for chemistry, physics, thermodynamics, and any situation where you need to translate scientific temperature data into everyday Celsius values.
Formula used: °C = K − 273.15
Need to convert Celsius to Kelvin? Try our Celsius to Kelvin Converter.
Kelvin to Celsius Formula
To convert Kelvin to Celsius, simply subtract 273.15 from the Kelvin value.
Formula:
°C = K − 273.15
For example, to convert 310.15 K to Celsius, subtract 273.15.
310.15 − 273.15 = 37°C
So 310.15 Kelvin equals 37 degrees Celsius — human body temperature.
Key Temperature Benchmarks: K to °C
These landmarks make Kelvin to Celsius conversions easy to verify at a glance:
- Absolute zero: 0 K = -273.15°C
- Water freezes: 273.15 K = 0°C
- Room temperature: 293.15 K = 20°C
- Body temperature: 310.15 K = 37°C
- Water boils: 373.15 K = 100°C
- Sun's surface: ~5778 K ≈ 5504.85°C
Kelvin to Celsius Conversion Table
Use this quick reference table for common K to °C conversions.
| Kelvin (K) | Celsius (°C) |
|---|---|
| 0 K | -273.15°C (absolute zero) |
| 100 K | -173.15°C |
| 200 K | -73.15°C |
| 273.15 K | 0°C |
| 293.15 K | 20°C |
| 310.15 K | 37°C |
| 373.15 K | 100°C |
| 500 K | 226.85°C |
| 1000 K | 726.85°C |
| 5778 K | 5504.85°C |
Common Kelvin to Celsius Conversions
- 0 K to Celsius: 0 K = -273.15°C (absolute zero)
- 273.15 K to Celsius: 273.15 K = 0°C (water freezes)
- 293.15 K to Celsius: 293.15 K = 20°C (room temperature)
- 373.15 K to Celsius: 373.15 K = 100°C (water boils)
- 5778 K to Celsius: 5778 K ≈ 5504.85°C (surface of the Sun)
When to Convert Kelvin to Celsius
You'll need to convert Kelvin to Celsius whenever you're working with scientific data and need to communicate temperatures in an everyday, human-readable format. Common use cases include:
- Interpreting chemistry or physics experiment results for lab reports
- Translating astrophysical temperature data into more relatable figures
- Converting thermodynamics textbook examples to familiar Celsius values
- Checking ideal gas law or equilibrium calculations by converting back to Celsius
- Industrial process monitoring where instruments output Kelvin values
- Cryogenics and low-temperature physics research outputs
Understanding the Kelvin Scale
The Kelvin scale is the SI base unit of temperature, named after Lord Kelvin (William Thomson), who first described the need for an absolute thermometric scale in 1848. Unlike Celsius and Fahrenheit, Kelvin has no negative values — it starts at absolute zero, the theoretical point at which all thermal motion stops.
Kelvin and Celsius share the same degree size. A change of 1 K is exactly equal to a change of 1°C. The only difference between them is where zero is defined. This means converting between them is as simple as adding or subtracting 273.15 — no multiplication required.
This simplicity, combined with its absolute starting point, makes Kelvin the preferred scale for all scientific and engineering calculations where temperature appears in equations as a physical quantity rather than just a measurement.
FAQ
How do I convert Kelvin to Celsius?
Subtract 273.15 from the Kelvin value. The formula is °C = K − 273.15.
What is the formula for Kelvin to Celsius?
°C = K − 273.15. Both scales have equal-sized degrees — only the zero point differs.
What is 273.15 K in Celsius?
273.15 K equals 0°C — the freezing point of water.
What is 0 K in Celsius?
0 K equals -273.15°C — absolute zero, the coldest possible temperature.
What is room temperature in Kelvin?
Room temperature is approximately 293.15 K, or 20°C.
What is 373.15 K in Celsius?
373.15 K equals 100°C — the boiling point of water at standard pressure.
Why is absolute zero the lowest possible temperature?
At 0 K (-273.15°C), all atomic motion stops. There is no lower energy state, so no temperature below 0 K can physically exist.