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Dictionary of Units / Measurements

Density

Density is the shortened term generally used in place of the more accurate description volumetric density. It is a measure of mass per unit volume. The S I compatible unit of density is kilograms/cubic metre. However, this a rather large unit for most purposes (iron is over 7000, wood is about 600 and even cork is over 200). A much more useful size of unit is kilograms/liter (for which the previous values then become 7, 0.6 and 0.2 respectively). This unit also has the great advantage of being numerically unchanged for grams/cubic centimeter and tonnes/cubic metre (or mega grams/cubic metre). To change any of these other units of density into their equivalent values in kilograms/liter use the operation and conversion factor given. Those marked with # are exact. Other values are given to an appropriate degree of accuracy.
 

grains/gallon(UK)      divide by  70 157

grains/gallon(US)      divide by  58 418

grams/cubic centimetre 1

grams/litre            divide by 1000 #

grams/millilitre       1

kilograms/cubic metre  divide by 1000 #

megagrams/cubic metre  1

milligrams/millilitre  divide by 1000 #

milligrams/litre       divide by 1 000 000 #

 

kilograms/litre        1

 

ounces/cubic inch      x 1.729 994 044

ounces/gallon(UK)      x 0.006 236 023

ounces/gallon(US)      x 0.007 489 152

pounds/cubic inch      x 27.679 905

pounds/cubic foot      x 0.016 018 463

pounds/gallon(UK)      x 0.099 776 373

pounds/gallon(US)      x 0.119 826 427

tonnes/cubic metre     1

tons(UK)/cubic yard    x 1.328 939 184

tons(US)/cubic yard    x 1.186 552 843

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