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