Calories (15 °C) to Celsius heat units (IT) conversion calculator shown above calculates how many Celsius heat units (IT) are in 'X' calories (15 °C) (where 'X' is the number of calories (15 °C) to convert to Celsius heat units (IT)). In order to convert a value from calories (15 °C) to Celsius heat units (IT) (from cal to CHU) just type the number of cal to be converted to CHU and then click on the 'convert' button.