## Conversion formula

The conversion factor from pounds to kilograms is 0.45359237, which means that 1 pound is equal to 0.45359237 kilograms:

1 lb = 0.45359237 kg

To convert 2.5 pounds into kilograms we have to multiply 2.5 by the conversion factor in order to get the mass amount from pounds to kilograms. We can also form a simple proportion to calculate the result:

1 lb → 0.45359237 kg

2.5 lb → M(kg)

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

M(kg) = 2.5 lb × 0.45359237 kg

M(kg) = 1.133980925 kg

The final result is:

2.5 lb → 1.133980925 kg

We conclude that 2.5 pounds is equivalent to 1.133980925 kilograms:

2.5 pounds = 1.133980925 kilograms

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilogram is equal to 0.88184904873951 × 2.5 pounds.

Another way is saying that 2.5 pounds is equal to 1 ÷ 0.88184904873951 kilograms.

## Approximate result

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

2.5 lb ≅ 1.134 kg

An alternative is also that one kilogram is approximately zero point eight eight two times two point five pounds.

## Conversion table

### pounds to kilograms chart

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

pounds (lb) kilograms (kg)
3.5 pounds 1.588 kilograms
4.5 pounds 2.041 kilograms
5.5 pounds 2.495 kilograms
6.5 pounds 2.948 kilograms
7.5 pounds 3.402 kilograms
8.5 pounds 3.856 kilograms
9.5 pounds 4.309 kilograms
10.5 pounds 4.763 kilograms
11.5 pounds 5.216 kilograms
12.5 pounds 5.67 kilograms