Celsius to Kelvin Converter
Convert Celsius to Kelvin instantly using the formula K = °C + 273.15. Enter any Celsius value below to get the Kelvin result, step-by-step formula, and reference examples.
Celsius to Kelvin Conversion Table
Need a quick reference without using our Celsius to Kelvin calculator? Use this chart to find common temperature benchmarks, 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 need to know how to calculate Kelvin from Celsius, the process is straightforward because they share the exact same step size. The equation to convert Celsius to Kelvin requires you to simply add 273.15 to your starting point.
This constant exists because 0 K represents absolute zero, which is universally recognized as −273.15°C. Essentially, the Kelvin scale is identical to the Celsius scale, just shifted upward.
Worked Examples
Reverse Operation
Working backward? Subtract 273.15 from your Kelvin value, or use our dedicated Kelvin to Celsius Converter →.
How to Convert Celsius to Kelvin
Wondering how do we convert Celsius to Kelvin manually? Follow this simple guide.
Understanding the Celsius to Kelvin Scale
Kelvin (K) is the base unit of temperature in the International System of Units (SI). Unlike standard weather-based measurements, it is an absolute scale starting exactly at absolute zero — the theoretical point where all thermal motion in matter stops.
Because there are no negative numbers, it is the primary standard used across the physical sciences, engineering, and astronomy. When calculating Celsius to Fahrenheit to Kelvin, it helps to remember that Celsius and Kelvin share the same intervals, whereas Fahrenheit requires a more complex multiplier.
Extended Conversion Chart
Browse standard thermal translations for the most commonly searched numeric values. Click any pair to load it into the converter above.
Celsius to Kelvin FAQs
K = °C + 273.15. This is the exact
Celsius to Kelvin formula used to convert
C to K. Kelvin uses K with no
degree symbol.
K = °C + 273.15. That is the full
Celsius to Kelvin conversion.
20 + 273.15 = 293.15 K.
22 + 273.15 = 295.15 K.
100 + 273.15 = 373.15 K.