Science, Tech, Math › Science How to Convert Celsius to Kelvin Steps to Convert Celsius to Kelvin Share Flipboard Email Print 76°C = 349.15 Kelvin. Rene Wassenbergh / EyeEm / Getty Images Science Chemistry Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated December 04, 2019 Celsius and Kelvin are the two most important temperature scales for scientific measurements. Fortunately, it's easy to convert between them because the two scales have the same size degree. All that is needed to convert Celsius to Kelvin is one simple step. (Note it's "Celsius", not "Celcius", a common mis-spelling.) Celsius to Kelvin Conversion Formula Take your Celsius temperature and add 273.15. K = °C + 273.15Your answer will be in Kelvin. Remember, the Kelvin temperature scale does not use the degree (°) symbol. The reason is because Kelvin is an absolute scale, based on absolute zero, while the zero on the Celsius scale is based on the properties of water. Also, measurements given in Kelvin will always be larger numbers than in Celsius. Celsius to Kelvin Conversion Examples For example, if you want to know what 20°C is in Kelvin: K = 20 + 273.15 = 293.15 K If you want to know what -25.7°C is in Kelvin: K = -25.7 + 273.15, which may be rewritten as: K = 273.15 - 25.7 = 247.45 K More Temperature Conversion Examples It's just as easy to convert Kelvin into Celsius. Another important temperature scale is the Fahrenheit scale. If you use this scale, you should be familiar with how to convert Celsius to Fahrenheit and Kelvin to Fahrenheit.