A person weighs 150 lbs, what is that weight in kg?
The Correct Answer and Explanation is:
To convert a weight from pounds (lbs) to kilograms (kg), we can use the conversion factor where 1 pound is approximately equal to 0.45359237 kilograms. To convert 150 lbs to kilograms, we can apply the following formula:
[
\text{Weight in kg} = \text{Weight in lbs} \times 0.45359237
]
Now substituting in the value:
[
\text{Weight in kg} = 150 \, \text{lbs} \times 0.45359237 \, \text{kg/lb}
]
Calculating this gives:
[
\text{Weight in kg} \approx 68.1819 \, \text{kg}
]
Thus, a person weighing 150 lbs is approximately 68.18 kg when rounded to two decimal places.
Explanation of the Conversion
The conversion from pounds to kilograms is often necessary in various fields, including science, medicine, and fitness. The pound is a unit of mass used primarily in the United States, while the kilogram is part of the metric system, which is used by most countries around the world. This difference in units can create confusion, particularly in global contexts, such as travel or international studies.
The conversion factor, 0.45359237, is derived from the definition of the kilogram, which is the base unit of mass in the International System of Units (SI). It is crucial to remember that this conversion factor provides a precise way to translate the measurement of weight, which helps maintain accuracy in data collection, reporting, and comparison.
Understanding these conversions is especially important in the healthcare field, where patient weights must be accurately recorded for medication dosing and nutritional planning. Additionally, athletes and trainers often need to monitor weight in both pounds and kilograms to meet specific standards or goals. Thus, being comfortable with such conversions aids in effective communication and ensures clarity in various professional and personal contexts.