How to Convert Between nm, um, mm, m and km

Question 1

If we had a scale of:

nm -> um -> mm -> m -> km

How would we convert to each unit as we move up the scale?

Answer 1

Divide by 1000

For example, 6mm = 0.006m or 6 x 10^-3 m

Then 0.006m = 0.000006km or 6 x 10^-6 km

Question 2

If we had a scale of:

nm -> um -> mm -> m -> km

How would we convert to each unit as we move down the scale?

Answer 2

Multiply by 1000

For example, 6mm = 6,000um or 6 x 10^3 um
Then 6,000um = 6,000,000nm or 6 x 10^6 nm

Question 3

How would you convert cm into m?

Answer 3

Divide by 100

There are 100cm in a metre.

Question 4

How would you convert cm to mm?

Answer 4

Multiply by 10

1cm is equal to 10mm.