1. What is Rock Density?

Definition: Rock density (ρ) is the mass per unit volume of a rock, typically measured in kilograms per cubic meter (kg/m³).

Purpose: Density is a fundamental property used in geology, construction, and engineering to characterize rock materials.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \rho \) — Density (kg/m³)
• \( m \) — Mass (kg)
• \( V \) — Volume (m³)

Explanation: The mass of the rock sample is divided by its volume to calculate density.

3. Typical Rock Density Values

Common ranges:

• Granite: 2,600-2,700 kg/m³
• Basalt: 2,800-3,000 kg/m³
• Sandstone: 2,000-2,600 kg/m³
• Limestone: 2,300-2,700 kg/m³

4. Using the Calculator

Tips: Enter the mass of your rock sample in kilograms and its volume in cubic meters. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why measure rock density?
A: Density helps identify rock types, calculate structural loads, and determine material suitability for construction.

Q2: How do I measure rock volume?
A: For regular shapes use geometric formulas. For irregular shapes, use water displacement method.

Q3: Does moisture affect density?
A: Yes, wet rocks typically have higher density than dry ones due to water filling pores.

Q4: What's bulk density vs. particle density?
A: Bulk density includes voids between particles, while particle density measures only the solid material.

Q5: How does density relate to rock strength?
A: Generally, denser rocks are stronger, but mineral composition also plays a significant role.