## 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 400 grams into kilograms we have to multiply 400 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

400 g → M(kg)

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

M(kg) = 400 g × 0.001 kg

M(kg) = 0.4 kg

The final result is:

400 g → 0.4 kg

We conclude that 400 grams is equivalent to 0.4 kilograms:

400 grams = 0.4 kilograms

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilogram is equal to 2.5 × 400 grams.

Another way is saying that 400 grams is equal to 1 ÷ 2.5 kilograms.

## Approximate result

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

400 g ≅ 0.4 kg

An alternative is also that one kilogram is approximately two point five times four hundred 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

grams (g) kilograms (kg)
401 grams 0.401 kilograms
402 grams 0.402 kilograms
403 grams 0.403 kilograms
404 grams 0.404 kilograms
405 grams 0.405 kilograms
406 grams 0.406 kilograms
407 grams 0.407 kilograms
408 grams 0.408 kilograms
409 grams 0.409 kilograms
410 grams 0.41 kilograms