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
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 
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 
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 
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 