This is a straightforward conversion. To convert pounds (lbs) to kilograms (kg), you use the conversion factor that 1 pound is equal to approximately 0.453592 kilograms. Therefore, to find out how many kilograms 140 lbs is, you multiply 140 by this factor.

140 lbs * 0.453592 kg/lb = 63.50288 kg.

So, 140 lbs is approximately 63.5 kilograms. This conversion is useful for many applications, including travel, where weight restrictions are often listed in kilograms, or for understanding nutritional information that may be provided in metric units.

| Measurement | Value | Unit |
|——————|———|—————-|
| Weight in Pounds | 140 | lbs |
| Weight in Kilograms | 63.50 | kg (approx.) |

For further reference on weight conversions, you can consult reliable sources like the National Institute of Standards and Technology (NIST).