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Density Converter

Convert density units including kilograms per cubic meter, grams per cubic centimeter, pounds per cubic foot, and pounds per gallon.

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0.01 Gram per Cubic Centimeter

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Educational Guide

Understanding Density

Density measures how tightly matter is packed into a given space. Heavier, dense materials like gold and lead have high mass per unit volume.

Engineering & Material Science Uses

Density conversions are used in civil engineering to calculate structural soil compaction, aerospace weight budgets, and fluid buoyancy.

Common Density Benchmarks

Air at sea level is ~1.225 kg/m³, Water is 1,000 kg/m³ (1 g/cm³), Concrete is ~2,400 kg/m³, Aluminum is ~2,700 kg/m³, and Gold is 19,300 kg/m³.

Temperature and Pressure Effects

Because substances expand when heated and compress under pressure, gas and liquid density values often specify temperature (e.g. at 20°C standard ambient).

Frequently Asked Questions

What is density?

Density is the mass of a substance divided by its volume (Density = Mass / Volume). In the metric system, the SI unit is kg/m³.

What is the density of pure water?

At 4°C, pure liquid water has a density of approximately 1,000 kg/m³, 1.0 g/cm³, 1.0 g/mL, or about 8.34 lb/gal (US).

How do I convert g/cm³ to kg/m³?

Multiply the value in g/cm³ by 1,000. For example, steel at ~7.85 g/cm³ is equal to 7,850 kg/m³.

What is the difference between density and specific gravity?

Density is an absolute measurement with units (e.g. kg/m³), whereas specific gravity (relative density) is dimensionless, comparing a material's density directly against water.

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