18000000000000 mi to light year 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 Light Years are 18000000000000 Miles we have to multiply 18000000000000 by 1397 and divide the product by 8212439646337500. So for 18000000000000 we have: (18000000000000 × 1397) ÷ 8212439646337500 = 2.5146E+16 ÷ 8212439646337500 = 3.0619403104185 Light Years
So finally 18000000000000 mi = 3.0619403104185 light year