21 centimeters in meters

Conversion formula
How to convert 21 centimeters to meters?

We know (by definition) that: $1\mathrm{cm}=0.01\mathrm{m}$

We can set up a proportion to solve for the number of meters.

Now, we cross multiply to solve for our unknown $x$:

Conclusion: 21 ⁢ cm = 0.21 ⁢ m

Conversion in the opposite direction

The inverse of the conversion factor is that 1 meter is equal to 4.76190476190476 times 21 centimeters.

It can also be expressed as: 21 centimeters is equal to $\frac{1}{\mathrm{4.76190476190476}}$ meters.

Approximation

An approximate numerical result would be: twenty-one centimeters is about zero meters, or alternatively, a meter is about four point seven five times twenty-one centimeters.