Science, Tech, Math › Science Difference Between Celsius and Centigrade Centigrade, Hectograde, and Celsius Scales Share Flipboard Email Print MarianVejcik / 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 May 04, 2019 Depending on how old you are, you might read 38°C as 38 degrees Celsius or 38 degrees centigrade. Why are there two names for °C and what's the difference? Here's the answer: Celsius and centigrade are two names for essentially the same temperature scale (with slight differences). The centigrade scale is divided into degrees based on dividing the temperature between which water freezes and boils into 100 equal gradients or degrees. The word centigrade comes from "centi-" for 100 and "grade" for gradients. The centigrade scale was introduced in 1744 and remained the primary scale of temperature until 1948. In 1948 the CGPM (Conference General des Poids et Measures) decided to standardize several units of measurement, including the temperature scale. Since the "grade" was in use as a unit (including the "centigrade"), a new name was chosen for the temperature scale: Celsius. Key Takeaways: Celsius vs. Centigrade The Celsius scale is a type of centigrade scale.A centigrade scale has 100 degrees between the freezing and boiling points of water.The original Celsius scale actually had a boiling point of 0 degrees and freezing point of 100 degrees. It ran in the opposite direction of the modern scale! The Celsius scale remains a centigrade scale in which there are 100 degrees from the freezing point (0°C) and boiling point (100°C) of water, though the size of the degree has been more precisely defined. A degree Celsius (or a Kelvin) is what you get when divide the thermodynamic range between absolute zero and the triple point of a specific type of water into 273.16 equal parts. There is a 0.01°C difference between the triple point of water and the freezing point of water at standard pressure. Interesting Facts About Celsius and Centigrade The temperature scale created by Anders Celsius in 1742 was actually the reverse of the modern Celsius scale. Celsius' original scale had water boil at 0 degrees and freeze at 100 degrees. Jean-Pierre Christin independently proposed at a temperature scale with zero at the freezing point of water and 100 was the boiling point (1743). Celsius' original scale was reversed by Carolus Linnaeus in 1744, the year in which Celsius died. The centigrade scale was confusing because "centigrade" was also the Spanish and French term for a unit of angular measurement equal to 1/100 of a right angle. When the scale was extended from 0 to 100 degrees for temperature, centigrade was more properly hectograde. The public was largely unaffected by the confusion. Even though the degree Celsius was adopted by international committees in 1948, weather forecasts issued by the BBC continued to use degrees centigrade until February 1985!