Density Calculator
Please provide any two values to the fields below to calculate the third value in the density equation of
.
The density of a material, typically denoted using the Greek symbol ρ, is defined as its mass per unit volume.
ρ = 


where:
ρ is the density
m is the mass
V is the volume 
The calculation of density is quite straightforward. However, it is important to pay special attention to the units used for density calculations. There are many different ways to express density, and not using or converting into the proper units will result in an incorrect value. It is useful to carefully write out whatever values are being worked with, including units, and perform dimensional analysis to ensure that the final result has units of
. Note that density is also affected by pressure and temperature. In the case of solids and liquids, the change in density is typically low. However, when regarding gases, density is largely affected by temperature and pressure. An increase in pressure decreases volume, and always increases density. Increases in temperature tend to decrease density since the volume will generally increase. There are exceptions however, such as water's density increasing between 0°C and 4°C.
Below is a table of units in which density is commonly expressed, as well as the densities of some common materials.
Common Density Units
Unit  kg/m^{3} 
kilogram/cubic meter  SI Unit 
kilogram/cubic centimeter  1,000,000 
gram/cubic meter [g/m^{3}]  0.001 
gram/cubic centimeter  1000 
kilogram/liter [kg/L]  1000 
gram/liter [g/L]  1 
pound/cubic inch [lb/in^{3}]  27,680 
pound/cubic foot [lb/ft^{3}]  16.02 
pound/cubic yard [lb/yd^{3}]  0.5933 
pound/gallon (US)  119.83 
pound/gallon (UK)  99.78 
ounce/cubic inch [oz/in^{3}]  1,730 
ounce/cubic foot [oz/ft^{3}]  1.001 
ounce/gallon (US)  7.489 
ounce/gallon (UK)  6.236 
ton (short)/cubic yard  1,186.6 
ton (long)/cubic yard  1,328.9 
psi/1000 feet  2.3067 
Density of Common Materials
Material  Density in kg/m^{3} 
Earth's atmosphere at sea level  1.2 
Water at standard temperature and pressure  1,000 
The Earth  5,515.3 
Iron  7,874 
Copper  8,950 
Tungsten  19,250 
Gold  19,300 
Platinum  21,450 
Atomic nuclei  2.3×10^{17} 
Black hole  above 1×10^{18} 