How many nanometers are in one meter?

Answer 1

There are one billion. ( 1,000,000,000 or 10-9 ) nanometers in a meter.

One millimeter is 1/1000 (one one-thousandth) of a meter, 103 mm = 1 m

One micrometer is 1/1,000,000 (one one-millionth) of a meter 106 μm = 1 m

One nanometer is 1/1,000,000,000 (one one-billionth) of a meter. 109 nm = 1 m
10 to the power (-9)

i.e. 1 nm = 10^(-9) m