680 m to nm 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 Nanometers are 680 Meters we have to multiply 680 by 1000000000 and divide the product by 1. So for 680 we have: (680 × 1000000000) ÷ 1 = 680000000000 ÷ 1 = 680000000000 Nanometers
So finally 680 m = 680000000000 nm