Ma'aunin Celsius shine ma'aunin zafin jiki da aka yi amfani da shi da farko a cikin tsarin awo. Ana kiran ta da sunan wani masanin falaki Anders Celsius, wanda ya ƙirƙira shi a shekara ta 1742. A kan ma'aunin Celsius, ana bayyana wurin daskarewar ruwa a matsayin 0 digiri Celsius (an rubuta shi da 0°C) kuma ana bayyana wurin tafasar ruwa a matsayin digiri 100. Celsius (an rubuta kamar 100 ° C). Ana amfani da ma'aunin Celsius a ko'ina cikin duniya, musamman a mahallin kimiyya da kuma a cikin ƙasashen da ke amfani da tsarin awo.