4.2 fl oz to ml conversion result above is displayed in three different forms: as a decimal (which could be rounded), in scientific notation (scientific form, standard index form or standard form in the United Kingdom) and as a fraction (exact result). Every display form has its own advantages and in different situations particular form is more convenient than another. For example usage of scientific notation when working with big numbers is recommended due to easier reading and comprehension. Usage of fractions is recommended when more precision is needed.
If we want to calculate how many Milliliters are 4.2 Ounces we have to multiply 4.2 by 473176473 and divide the product by 16000000. So for 4.2 we have: (4.2 × 473176473) ÷ 16000000 = 1987341186.6 ÷ 16000000 = 124.2088241625 Milliliters
So finally 4.2 fl oz = 124.2088241625 ml