1. What is lb/in³ to kg/m³ Conversion?

Definition: This calculator converts density measurements from pounds per cubic inch (lb/in³) to kilograms per cubic meter (kg/m³).

Purpose: It helps engineers, scientists, and students convert between imperial and metric density units.

2. How Does the Conversion Work?

The conversion uses the formula:

Where:

• \( \rho_{kg/m³} \) — Density in kilograms per cubic meter
• \( \rho_{lb/in³} \) — Density in pounds per cubic inch
• 27679.9 — Conversion factor (exact value: 27679.90471019)

Explanation: The conversion factor accounts for both mass (1 lb = 0.453592 kg) and volume (1 in³ = 1.63871×10⁻⁵ m³) conversions.

3. Importance of Density Conversion

Details: Accurate unit conversion is essential when working with international standards, scientific research, or engineering specifications that use different measurement systems.

4. Using the Calculator

Tips: Enter the density value in pounds per cubic inch (lb/in³). The result will show the equivalent density in kilograms per cubic meter (kg/m³).

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 27679.9?
A: It combines both mass (1 lb = 0.453592 kg) and volume (1 in³ = 0.0000163871 m³) conversions: 0.453592 / 0.0000163871 ≈ 27679.9

Q2: What's a typical density in lb/in³?
A: Water is about 0.0361 lb/in³, steel about 0.283 lb/in³, and aluminum about 0.098 lb/in³.

Q3: How precise is this conversion?
A: The conversion factor uses standard conversion rates accurate to 6 decimal places.

Q4: Can I convert kg/m³ back to lb/in³?
A: Yes, divide kg/m³ by 27679.9 to get lb/in³.

Q5: Why use kg/m³ instead of lb/in³?
A: kg/m³ is the standard SI unit for density used in most scientific and international contexts.