21 meters in kilometers

Result

The conversion result is: 21 meters is equivalent to 0.021 kilometers.[1]

Conversion formula
How to convert 21 meters to kilometers?

We know (by definition) that: 1 m = 0.001 km.

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

1 m / 21 m = 0.001 km / x km

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

x km = (21 m / 1 m) * 0.001 km → x km = 0.021 km

Conclusion:

21 m = 0.021 km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 47.6190476190476 times 21 meters.

It can also be expressed as: 21 meters is equal to 1 / 47.6190476190476 kilometers.

Approximation

An approximate numerical result would be: twenty-one meters is about zero point zero two kilometers, or alternatively, a kilometer is about forty-seven point six one times twenty-one meters.

Footnotes

[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).

Results may contain small errors due to the use of floating point arithmetic.