Density Converter

Density (ρ) is mass per unit of volume: ρ = m / V. Its SI unit is the kilogram per cubic meter (kg/m³). Water is about 1,000 kg/m³, which is 1 kg/L or 1 g/cm³, steel about 7,850 and air about 1.2.

Two handy equalities: 1 g/L is exactly 1 kg/m³, and 1 kg/L is 1 g/cm³, 1,000 kg/m³.

How to convert density units

Type a value into any field, and every other unit is calculated at once. For example, steel at 7,850 kg/m³:

1. In lb/ft³: multiply by 0.062428.

   7,850 * 0.062428 = 490.1 lb/ft³

2. In lb/in³: multiply by 0.0000361273.

   7,850 * 0.0000361273 = 0.2836 lb/in³

A density in g/cm³ is the same number as one in kg/L: enter it in the kg/L field.

Common conversions

Water at 4 °C is 62.43 lb/ft³, or 8.345 lb per US gallon.

Density units

• Kilogram per meter³ (kg/m³): Kilogram per cubic meter is one of the most used units of density. It represents the mass of a substance in kilograms contained within a volume of one cubic meter. It is a widely used unit for scientific calculations and measurements.
  Conversion Factor: 1 kg/m³ = 1 kg/m³

• Gram per meter³ (g/m³): Gram per cubic meter denotes the mass of a substance in grams contained within a volume of one cubic meter. It is commonly employed in environmental and industrial applications.
  Conversion Factor: 1 g/m³ = 0.001 kg/m³

• Milligram per meter³ (mg/m³): Milligram per cubic meter represents the mass of a substance in milligrams contained within a volume of one cubic meter. It is often used for precise measurements in pharmaceutical and chemical industries.
  Conversion Factor: 1 mg/m³ = 0.000001 kg/m³

• Kilogram per liter (kg/l): Kilogram per liter measures the mass of a substance in kilograms contained within a volume of one liter. It is frequently utilized in fluid dynamics and fluid mechanics.
  Conversion Factor: 1 kg/l = 1000 kg/m³

• Gram per liter (g/l): Gram per liter denotes the mass of a substance in grams contained within a volume of one liter. It finds application in various fields, including biochemistry and food science.
  Conversion Factor: 1 g/l = 1 kg/m³

• Milligram per liter (mg/l): Milligram per liter represents the mass of a substance in milligrams contained within a volume of one liter. It is commonly used in water quality testing and environmental analysis.
  Conversion Factor: 1 mg/l = 0.001 kg/m³

• Microgram per liter (μg/l): Microgram per liter signifies the mass of a substance in micrograms contained within a volume of one liter. It is employed in ultra-sensitive analytical measurements.
  Conversion Factor: 1 μg/l = 0.000001 kg/m³

• Pound per inch³ (lb/in³): Pound per cubic inch represents the mass of a substance in pounds contained within a volume of one cubic inch. It is commonly used in engineering and materials science.
  Conversion Factor: 1 lb/in³ = 27679.9 kg/m³

• Pound per foot³ (lb/ft³): Pound per cubic foot denotes the mass of a substance in pounds contained within a volume of one cubic foot. It is frequently utilized in construction, architecture, and HVAC systems.
  Conversion Factor: 1 lb/ft³ = 1/1728 lb/in³ = 16.0185 kg/m³

• Pound per yard³ (lb/yd³): Pound per cubic yard represents the mass of a substance in pounds contained within a volume of one cubic yard. It finds applications in landscaping, soil science, and waste management.
  Conversion Factor: 1 lb/yd³ = 1/27 lb/ft³ = 0.5933 kg/m³

• Pound per US gallon (lb/gal): Pound per U.S. gallon signifies the mass of a substance in pounds contained within a volume of one U.S. gallon. It is commonly used in the United States for liquid density measurements.
  Conversion Factor: 1 lb/gal (US) = 0.004329 lb/in³ = 119.83 kg/m³

• Pound per UK gallon (lb/gal): Pound per U.K. gallon represents the mass of a substance in pounds contained within a volume of one U.K. gallon. It is primarily used in the United Kingdom for liquid density calculations.
  Conversion Factor: 1 lb/gal (UK) = 0.003605 lb/in³ = 99.78 kg/m³

• Ounce per inch³ (oz/in³): Ounce per cubic inch denotes the mass of a substance in ounces contained within a volume of one cubic inch.
  Conversion Factor: 1 oz/in³ ≈ 1730 kg/m³

• Ounce per foot³ (oz/ft³): Ounce per cubic foot represents the mass of a substance in ounces contained within a volume of one cubic foot.
  Conversion Factor: 1 oz/ft³ = 1/1728 oz/in³ ≈ 1.00115 kg/m³

• Ounce per US gallon (oz/gal): Ounce per U.S. gallon signifies the mass of a substance in ounces contained within a volume of one U.S. gallon.
  Conversion Factor: 1 oz/gal (US) ≈ 7.4892 kg/m³

• Ounce per UK gallon (oz/gal): Ounce per U.K. gallon represents the mass of a substance in ounces contained within a volume of one U.K. gallon.
  Conversion Factor: 1 oz/gal (UK) ≈ 6.2360 kg/m³

• Short ton per yard³ (t/yd³): Short ton per cubic yard denotes the mass of a substance in short tons contained within a volume of one cubic yard. It is commonly used in construction and bulk material transportation.
  Conversion Factor: 1 t/yd³ (short) = 2000 lb/yd³ ≈ 1186.5528 kg/m³

• Long ton per yard³ (t/yd³): Ton per cubic yard (Long) represents the mass of a substance in long tons contained within a volume of one cubic yard. It is primarily used in the United Kingdom and some Commonwealth countries.
  Conversion Factor: 1 t/yd³ (long) = 2240 lb/yd³ ≈ 1328.9392 kg/m³

• Slug per foot³ (slug/ft³): Slug per cubic foot signifies the mass of a substance in slugs contained within a volume of one cubic foot. It is commonly used in engineering and physics, particularly in relation to mass and force calculations.
  Conversion Factor: 1 slug/ft³ ≈ 515.38 kg/m³

• Psi per 1000 feet (psi/1000 feet): Psi per 1000 feet represents the pressure exerted by a substance in pounds per square inch over a distance of 1000 feet. It is often used in the oil and gas industry for measuring gas pressure gradients.
  Conversion Factor: 1 psi/1000 feet ≈ 2.3067 kg/m³

Frequently asked questions

What is specific gravity?

The density of a substance divided by the density of water, about 1,000 kg/m³. It has no unit: steel's specific gravity is about 7.85. To get a density in kg/m³, multiply the specific gravity by 1,000.