The prefix "mega" means 106. So 1 megapascal = 1,000,000 pacals or 1 pascal = 0.000001 megapascals.
To convert pascals to megapascals, divide the pressure value in pascals by 1,000,000. For instance, to convert 5,000,000 pascals to megapascals, you would divide 5,000,000 by 1,000,000 to get 5 megapascals.
In this context, 1 J (Joule) is equal to 1 kPa L (kiloPascal liter) because they both represent the same amount of energy. 1 Joule is the standard unit of energy in the International System of Units (SI), while 1 kiloPascal liter is a non-SI unit that can also be used to measure energy but is more commonly used in certain fields like engineering and fluid mechanics.