1. What is Pound to Kilogram Conversion?

The pound (lb) to kilogram (kg) conversion is a fundamental unit conversion between the imperial and metric systems. One pound is equal to approximately 0.453592 kilograms.

2. How Does the Conversion Work?

The conversion uses the formula:

Where:

• \( lb \) — Weight in pounds
• \( 2.20462 \) — Pounds in one kilogram (conversion factor)

Explanation: This formula provides the exact conversion factor defined by international agreement.

3. Importance of Weight Conversion

Details: Accurate weight conversion is essential in many fields including medicine, science, engineering, and international trade where metric system is standard.

4. Using the Calculator

Tips: Enter weight in pounds (must be positive number). The calculator will automatically convert to kilograms with high precision.

5. Frequently Asked Questions (FAQ)

Q1: How many kg is 1 pound exactly?
A: 1 pound equals exactly 0.45359237 kilograms by international definition.

Q2: Why is 2.20462 used in the formula?
A: This is the reciprocal of 0.45359237, representing how many pounds are in one kilogram.

Q3: Is this conversion factor exact?
A: Yes, the conversion factor is defined exactly by international agreement since 1959.

Q4: When would I need this conversion?
A: Common uses include medical dosing, scientific research, international shipping, and when traveling between countries using different measurement systems.

Q5: How precise is this conversion?
A: The conversion is mathematically exact, though practical measurements may be limited by the precision of your scale.