# General Tables of Units of Measurement with PDF

These tables have been prepared for the benefit of those requiring tables of units for occasional ready reference. In Section 4 of this Appendix, the tables are carried out to a large number of decimal places and exact values are indicated by underlining. In most of the other tables, only a limited number of decimal places are given, therefore making the tables better adapted to the average user.

1. Tables of Metric Units of Measurement
In the metric system of measurement, designations of multiples and subdivisions of any unit may be arrived at by combining with the name of the unit the prefixes deka, hecto, and kilo meaning, respectively, 10, 100, and 1000, and deci, centi, and milli, meaning, respectively, one-tenth, one-hundredth, and one-thousandth. In some of the following metric tables, some such multiples and subdivisions have not been included for the reason that these have little, if any currency in actual usage.

In certain cases, particularly in scientific usage, it becomes convenient to provide for multiples larger than 1000 and for subdivisions smaller than one-thousandth. Accordingly, the following prefixes have been introduced and these are now generally recognized :
yotta, (Y) meaning 1024
zetta, (Z), meaning 1021
exa, (E), meaning 1018
peta, (P), meaning 1015
tera, (T), meaning 1012
giga, (G), meaning 109
mega, (M), meaning 105
kilo, (k), meaning 103
hecto, (h), meaning 102
deka, (da), meaning 101
deci, (d), meaning 10-1
centi, (c), meaning 10-2
milli, (m), meaning 10-3
micro, (µ), meaning 10-6
nano, (n), meaning 10-9
pico, (p), meaning 10-12
femto, (f), meaning 10-15
atto, (a), meaning 10-18
zepto, (z), meaning 10-21
yocto, (y), meaning 10-24

Units of Length
10 millimeters (mm) = 1 centimeter (cm)
10 centimeters = 1 decimeter (dm) = 100 millimeters
10 decimeters = 1 meter (m) = 1000 millimeters
10 meters = 1 dekameter (dam)
10 dekameters = 1 hectometer (hm) = 100 meters
10 hectometers = 1 kilometer (km) = 1000 meters

Units of Area
100 square millimeters (mm2) = 1 square centimeter (cm2)
100 square centimeters = 1 square decimeter (dm2)
100 square decimeters = 1 square meter (m2)
100 square meters = 1 square dekameter (dam2) = 1 are
100 square dekameters = 1 square hectometer (hm2) = 1 hectare (ha)
100 square hectometers = 1 square kilometer (km2)

Units of Liquid Volume
10 milliliters (mL) = 1 centiliter (cL)
10 centiliters = 1 deciliter (dL) = 100 milliliters
10 deciliters = 1 liter = 1000 milliliters
10 liters = 1 dekaliter (daL)
10 dekaliters = 1 hectoliter (hL) = 100 liters
10 hectoliters = 1 kiloliter (kL) = 1000 liters
By action of the 12th General Conference on Weights and Measures (1964), the liter is a special name for the cubic decimeter.
United States Units of Measurement Table
British Units of Measurement
List of all Units of Measurement
General Tables of Equivalents–Units of Length, Area and Volume

Units of Volume
1000 cubic millimeters (mm3) = 1 cubic centimeter (cm3)
1000 cubic centimeters = 1 cubic decimeter (dm3) = 1000000 cubic millimeters
1000 cubic decimeters = 1 cubic meter (m3) = 1000000 cubic centimeters = 1000000000 cubic millimeters
Units of Mass
10 milligrams (mg) = 1 centigram (cg)
10 centigrams = 1 decigram (dg) = 100 milligrams
10 decigrams = 1 gram (g) = 1000 milligrams
10 grams = 1 dekagram (dag)
10 dekagrams = 1 hectogram (hg) = 100 grams
10 hectograms = 1 kilogram (kg) = 1000 grams
1000 kilograms = 1 megagram (Mg) or 1 metric ton (t)