Tables of Unit Conversion Information
Study the information in the tables below. When you're ready, test your knowledge with these exercises:
 classifying units as length, time, volume, weight/mass
 practice with unit abbreviations
 practice with unit names
 practice with unit conversion information
 onestep conversions
 multistep conversions
 rate problems
Abbreviations may be used for either singular or plural usage:
1 foot is abbreviated as 1 ft
2 feet is abbreviated as 2 ft
UNITS OF LENGTH
Name of Unit  Common Abbreviation  Conversion Information 

millimeter (metric)  mm  
centimeter (metric)  cm 
1 cm is about 0.4 in
a centimeter is shorter than an inch

meter (metric)  m 
1 m is about 1.1 yd
a meter is a little longer than a yard
1 m = 1000 mm
1 m = 100 cm

kilometer (metric)  km 
1 km is about 0.6 mi
a kilometer is shorter than a mile
a kilometer is a little more than half a mile
1 km = 1000 m

inch  in  1 in is about 2.5 cm 
foot  ft  1 ft = 12 in 
yard  yd 
1 yd = 36 in
1 yd = 3 ft

mile  mi 
1 mi is about 1.6 km
a mile is longer than a kilometer
a mile is a little more than one and a half kilometers
1 mi = 5,280 ft

UNITS OF TIME
Name of Unit  Common Abbreviation  Conversion Information 

second  sec  
minute  min  1 min = 60 sec 
hour  hr  1 hr = 60 min 
day  1 day = 24 hr  
week  wk  1 wk = 7 days 
month  1 month is about 30 days  
year  yr 
1 year is about 365 days
1 year is about 52 weeks

decade  1 decade = 10 yr  
century  1 century = 100 yr 
UNITS OF VOLUME
Name of Unit  Common Abbreviation  Conversion Information 

liter (metric) 
1 liter is about 1.1 qt
a liter is a little more than a quart
1 liter = 1000 ml


milliliter (metric)  ml  
gallon  gal  1 gal = 4 qt 
quart  qt  1 qt = 4 cups 
pint  pt  1 pt = 2 cups 
cup  1 cup = 8 fl oz  
fluid ounce  fl oz  
tablespoon  tb  1 tb = 3 tsp 
teaspoon  tsp 
UNITS OF MASS AND WEIGHT
Name of Unit  Common Abbreviation  Conversion Information 

kilogram (metric)  kg  1 kg = 1000 g 
gram (metric)  g  
ton  1 ton = 2000 lb  
pound  lb  1 lb = 16 oz 
ounce  oz 
When you're done studying this information, move on to:
Classifying Units as Length, Time, Volume, Weight/Mass
Classifying Units as Length, Time, Volume, Weight/Mass