## 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 2.5 grams into kilograms we have to multiply 2.5 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

2.5 g → M(kg)

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

M(kg) = 2.5 g × 0.001 kg

M(kg) = 0.0025 kg

The final result is:

2.5 g → 0.0025 kg

We conclude that 2.5 grams is equivalent to 0.0025 kilograms:

2.5 grams = 0.0025 kilograms

## Alternative conversion

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

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

## Approximate result

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

2.5 g ≅ 0.003 kg

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

grams (g) kilograms (kg)
3.5 grams 0.004 kilograms
4.5 grams 0.005 kilograms
5.5 grams 0.006 kilograms
6.5 grams 0.007 kilograms
7.5 grams 0.008 kilograms
8.5 grams 0.009 kilograms
9.5 grams 0.01 kilograms
10.5 grams 0.011 kilograms
11.5 grams 0.012 kilograms
12.5 grams 0.013 kilograms