What is the conversion factor from pounds to kilograms?

The conversion factor from pounds to kilograms is based on the standard measurement of weight where 1 pound is defined as approximately 0.453592 kilograms. This value is rooted in the relationship established by the metric system, which is widely used in scientific and medical contexts.

When converting weights, having the accurate conversion factor is crucial for ensuring proper dosing and calculations in medication administration. The correct factor allows healthcare professionals to convert patient weights from pounds to kilograms seamlessly, which is essential for calculating dosages that are often prescribed in metric units.

Thus, using 0.453592 as the conversion factor ensures precision in medical calculations, maintaining patient safety and efficacy in treatment. This is why this option is the correct choice for converting pounds to kilograms.