Celsius to Kelvin Converter
Convert degrees Celsius to kelvins (°C to K) instantly, with the formula and a conversion chart.
Everything is converted entirely in your browser. Nothing is sent to a server.
This tool is temporarily unavailable.
Please check back later.
How to convert degrees Celsius to kelvins
Add 273.15. K = °C + 273.15.
Example: 25°C = 298.15 K.
Kelvin is the SI unit of temperature, used in physics, chemistry and for the color temperature of lights and cameras.
Celsius to Kelvin conversion chart
| Degrees Celsius | Kelvins |
|---|---|
| -273.15°C | 0 K |
| -196°C | 77.15 K |
| -100°C | 173.15 K |
| -40°C | 233.15 K |
| 0°C | 273.15 K |
| 20°C | 293.15 K |
| 25°C | 298.15 K |
| 37°C | 310.15 K |
| 100°C | 373.15 K |
| 500°C | 773.15 K |
| 1,000°C | 1,273.15 K |
| 5,500°C | 5,773.15 K |
How to use this tool
- 1Type the number of degrees Celsius in the Value box.
- 2The result in kelvins appears instantly.
- 3Use the ⇄ button to convert kelvins to degrees Celsius instead, or pick any other unit.
Features
- Exact °C to K conversion using the standard definition.
- Results update as you type, rounded to 6 decimal places.
- Switch to any other length, weight, temperature, volume or speed unit.
Privacy
Everything is calculated in your browser. Nothing is sent to a server.
Frequently asked questions
Why is there no degree sign in kelvin?
Kelvin is an absolute scale, so it is written "300 K", not "300°K".
What is absolute zero?
0 K, which is −273.15°C — the lowest possible temperature.
How do I convert kelvins back to degrees Celsius?
Use the swap button in the converter above, or the Kelvin to Celsius converter. Temperature scales have different zero points, so you can't simply divide by the factor.
Popular conversions
- CM to Inches
- Inches to CM
- Feet to Meters
- Meters to Feet
- KM to Miles
- Miles to KM
- MM to Inches
- Inches to MM
- Feet to CM
- CM to Feet
- Yards to Meters
- Meters to Yards
- KG to LBS
- LBS to KG
- Grams to Ounces
- Ounces to Grams
- Celsius to Fahrenheit
- Fahrenheit to Celsius
- Kelvin to Celsius
- Liters to Gallons
- Gallons to Liters
- ML to OZ
- OZ to ML
- Cups to ML
- ML to Cups
- KM/H to MPH
- MPH to KM/H
Guides
- Holiday Baking Conversions: Cups to ML, °F to °C and More
Baking a recipe from another country this holiday season? Convert cups, sticks of butter, ounces and oven temperatures correctly — with a handy chart.
- How to Convert Kilograms to Pounds (and Pounds to Kilograms)
1 kg = 2.20462 lb. Learn the exact kg-to-lbs formula, a quick mental trick, and a chart for body weight, luggage limits and gym plates.
- How to Convert Celsius to Fahrenheit (and Back)
The exact formula for converting °C to °F and °F to °C, a quick mental shortcut, and a handy chart of everyday temperatures for weather, cooking and fever.
- Everyday Unit Conversions Made Simple
From cooking in a different measurement system to converting kilometers to miles, here's a quick guide to the unit conversions people actually need.