Celsius to Kelvin Converter
Use our calculator to convert Celsius to Kelvin. The c to k formula is simple: K = °C + 273.15. Enter any Celsius value below. You’ll get the Kelvin result, the step by step math, and common examples.
Celsius to Kelvin Conversion Table
Need a quick reference without using our celsius to kelvin calculator? Use this c to k conversion chart to find common temperature benchmarks. We cover everything from absolute zero to the surface of the Sun.
| Celsius (°C) | Kelvin (K) | Context |
|---|---|---|
| −273.15°C | 0 K | Absolute zero (lowest possible temperature) |
| −196°C | 77.15 K | Liquid nitrogen |
| −40°C | 233.15 K | Point where °C equals °F |
| −20°C | 253.15 K | Typical freezer temperature |
| 0°C | 273.15 K | Freezing point of water |
| 20°C | 293.15 K | Average indoor room temperature |
| 25°C | 298.15 K | Standard benchmark used in chemistry |
| 37°C | 310.15 K | Average human body temperature |
| 50°C | 323.15 K | Halfway to boiling point |
| 60°C | 333.15 K | Standard hot water heater setting |
| 100°C | 373.15 K | Boiling point of water (at sea level) |
| 200°C | 473.15 K | Typical oven baking temperature |
| 1000°C | 1273.15 K | High heat industrial manufacturing |
| 5505°C | 5778.15 K | Approximate surface temperature of the Sun |
The Celsius to Kelvin Conversion Formula
If you want to know how to calculate Kelvin from Celsius, the math is easy. The degree c to k formula asks you to just add 273.15 to your starting number. The equation to convert Celsius to Kelvin works because both scales share the exact same step size.
This fixed number exists because 0 K is absolute zero. Absolute zero is universally recognized as −273.15°C. The Kelvin scale is just the Celsius scale shifted upward.
Worked Examples
Reverse Operation
Working backward? Subtract 273.15 from your Kelvin temperature. You can also use our dedicated Kelvin to Celsius Converter →.
How to Convert Celsius to Kelvin
Wondering how do we convert Celsius to Kelvin manually? Follow this quick guide for converting c to k.
Understanding the Celsius to Kelvin Scale
Kelvin (K) is the base unit of temperature in the International System of Units (SI). It is an absolute scale. It starts exactly at absolute zero, the point where all thermal motion in matter stops.
There are no negative numbers on this scale. It’s the primary standard used across science and engineering. When you convert degrees c to degrees k, just remember that Celsius and Kelvin use the exact same intervals.
Extended Conversion Chart
Browse standard c to k temp values below. Click any pair to load it into the converter.
Celsius to Kelvin FAQs
K = °C + 273.15. This is the exact
c to k formula used to convert temperatures.
Kelvin uses K with no degree symbol.
K = °C + 273.15 completes your
celsius to kelvin conversion.
20 + 273.15 = 293.15 K.
22 + 273.15 = 295.15 K.
25 + 273.15 = 298.15 K.
100 + 273.15 = 373.15 K.