Conversion formula

The conversion factor from grams to kilograms is 0.001, which means that 1 gram is equal to 0.001 kilograms:

1 g = 0.001 kg

To convert 21.5 grams into kilograms we have to multiply 21.5 by the conversion factor in order to get the mass amount from grams to kilograms. We can also form a simple proportion to calculate the result:

1 g → 0.001 kg

21.5 g → M_(kg)

Solve the above proportion to obtain the mass M in kilograms:

M_(kg) = 21.5 g × 0.001 kg

M_(kg) = 0.0215 kg

The final result is:

21.5 g → 0.0215 kg

We conclude that 21.5 grams is equivalent to 0.0215 kilograms:

21.5 grams = 0.0215 kilograms

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilogram is equal to 46.511627906977 × 21.5 grams.

Another way is saying that 21.5 grams is equal to 1 ÷ 46.511627906977 kilograms.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that twenty-one point five grams is approximately zero point zero two two kilograms:

21.5 g ≅ 0.022 kg

An alternative is also that one kilogram is approximately forty-six point five one two times twenty-one point five grams.

Conversion table

grams to kilograms chart

For quick reference purposes, below is the conversion table you can use to convert from grams to kilograms