30000 ft to km 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 Kilometers are 30000 Feet we have to multiply 30000 by 381 and divide the product by 1250000. So for 30000 we have: (30000 × 381) ÷ 1250000 = 11430000 ÷ 1250000 = 9.144 Kilometers
So finally 30000 ft = 9.144 km
