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 621 grams into kilograms we have to multiply 621 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

621 g → M_(kg)

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

M_(kg) = 621 g × 0.001 kg

M_(kg) = 0.621 kg

The final result is:

621 g → 0.621 kg

We conclude that 621 grams is equivalent to 0.621 kilograms:

621 grams = 0.621 kilograms

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilogram is equal to 1.610305958132 × 621 grams.

Another way is saying that 621 grams is equal to 1 ÷ 1.610305958132 kilograms.

Approximate result

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

621 g ≅ 0.621 kg

An alternative is also that one kilogram is approximately one point six one times six hundred twenty-one 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