angstrom (Å)

0.1 nanometer (exactly).

0.0001 micrometer (exactly).

0.000 000 1 millimeter (exactly).

0.000 000 004 inch.

1 cable's length                      

120 fathoms (exactly).

720 feet (exactly).

219 meters.

1 centimeter (cm)

0.3937 inch.

10 millimeters (mm) (exactly).

1 chain (ch) (Gunter's or surveyors)

66 feet (exactly).

20.1168 meters.

1 decimeter (dm)

3.937 inches.

10 centimeters (exactly).

100 millimeters (exactly).

1 dekameter (dam)

32.808 feet.

10 meters (exactly).

1 fathom                              

6 feet (exactly).

1.828 8 meters.

1 foot (ft)

0.3048 meter (exactly).

12 inches (in) (exactly).

1 furlong (fur)                       

10 chains (surveyors) (exactly).

660 feet (exactly).

1/8 U.S. statute mile (exactly).

201.168 meters.

40 rods (exactly).

[1 hand]                               

4 inches.

1 inch (in)

2.54 centimeters (exactly).

1 hectometer (hm)

10 dekameters (exactly).

100 meters (exactly).

1 kilometer (km)

0.621 mile.

10 hectometers (exactly).

1000 meters (exactly).

1 league (land)                       

3 U.S. statute miles (exactly).

4.828 kilometers.

1 link (li) (Gunter's or surveyors)   

0.66 foot (exactly).

0.201168 meter.

1 meter (m)                           

39.37 inches.

1.094 yards.

10 decimeters (exactly).

1000 millimeters (exactly).

1 micrometer                          

0.001 millimeter (exactly).

0.000 039 37 inch.

1 mil                                 

0.001 inch (exactly).

0.0254 millimeter (exactly).

1 mile (mi) (U.S. statute)      

5280 survey feet (exactly).

1.609 kilometers.

8 furlongs (exactly).

1 mile (mi) (international)

5280 international feet (exactly).

1 mile (mi) (international nautical)

1.852 kilometers (exactly).

1.151 survey miles.

1852 meters (exactly).

6076.115 49 feet.

1 millimeter (mm)

0.03937 inch.

1 nanometer (nm)                      

0.001 micrometer (exactly).

0.000 000 039 37 inch.

1 Point (typography)                  

0.013 837 inch (exactly).

1/72 inch (approximately).

0.351 millimeter.

1 rod (rd), pole, or perch            

16 1/2 feet (exactly).

5.0292 meters.

16-1/2 feet (exactly).

1 yard (yd)

0.9144 meter (exactly).

3 feet (exactly).

1 acre                         

43,560 square feet (exactly).

160 square rods (exactly).

0.405 hectare.

1 are                             

119.599 square yards.

0.025 acre.

1 square dekameter.

100 square meters.

1 hectare

2.471 acre.

1 square hectometer.

100 square dekameters.

[1 square (building)]              

100 square feet.

1 square centimeter (cm2)

0.155 square inch.

100 square millimeters (mm2) (exactly).

1 square decimeter (dm2)

15.500 square inches.

100 square centimeters (exactly).

1 square dekameter (dam2)

100 square meters (exactly).

1 are (exactly).

1 square foot (ft2)

929.030 square centimeters.

144 square inches (in2) (exactly).

1 square hectometer (hm2)

100 square dekameters (exactly).

1 hectare (ha) (exactly).

1 square inch (in2)

6.4516 square centimeters (exactly).

1 square kilometer (km2)           

247.104 acre.

0.386 square mile.

100 square hectometer (exactly).

1 square meter (m2)                

1.196 square yards.

10.764 square feet.

100 square decimeters (exactly).

1 square mile (mi2)

258.999 hectares.

640 acres (exactly).

1 square millimeter (mm2)

0.002 square inch.

1 square rod (rd2), sq pole, or sq perch

25.293 square meters.

272¼ square feet (exactly).

1 square yard (yd2)

0.836 square meter.

9 square feet (exactly).

1296 square inches (exactly).

1 barrel (bbl), liquid

31 to 42 gallons.

1 barrel (bbl), standard for fruits, vegetables, and other dry commodities, except cranberries

7056 cubic inches.

105 dry quarts.

3.281 bushels, struck measure.

1 barrel (bbl), standard cranberry   

5 826 cubic inches.

86 45/64 dry quarts.

2.709 bushels, struck measure.

1 bushel (bu) (U.S.) struck measure   

2150.42 cubic inches (exactly).

35.239 liters.

4 pecks (exactly).

32 quarts (exactly).

[1 bushel, heaped (U.S.)]             

2747.715 cubic inches.

1.278 bushels, struck measure.

[1 bushel (bu) (British Imperial)

(struck measure)]                     

1.032 U.S. bushels, struck measure

2219.36 cubic inches.

1 centiliter (cL)

10 milliliters (mL) (exactly)

1 cord (cd) (firewood)

128 cubic feet (exactly).

1 cubic centimeter (cm3)

0.061 cubic inch.

1000 cubic millimeters (mm3) (exactly).

1 cubic decimeter (dm3)

61.024 cubic inches.

1000 cubic centimeters (exactly).

1000 000 cubic millimeters (exactly).

1 cubic foot (ft3)                    

7.481 gallons.

28.316 cubic decimeters.

1728 cubic inches (in3) (exactly).

1 cubic inch (in3)                      

0.554 fluid ounce.

4.433 fluid drams.

16.387 cubic centimeters.

1 cubic meter (m3)

1.308 cubic yards.

1000 cubic decimeters (exactly).

1000 000 cubic centimeters (exactly).

1000 000 000 cubic millimeters (exactly). 

1 cubic yard (yd3)

0.765 cubic meter.

27 cubic feet (exactly).

1 cup, measuring                      

8 fluid ounces (exactly).

237 milliliters.

1/2 liquid pint (exactly).

1 deciliter (dL)

10 centiliters (exactly)

100 milliliters (exactly)

1 dekaliter (daL)                     

2.642 gallons.

1.135 pecks.

10 liters (exactly)

1 dram, fluid (or liquid) (fl dror f ) (U.S.)

1/8 fluid ounce (exactly).

0.2256 cubic inch (exactly).

3.697 milliliters.

1.041 British fluid drachms.

60 minims (min) (exactly).

[1 drachm, fluid (fl dr) (British)]   

0.961 U.S. fluid dram.

0.217 cubic inch.

3.552 milliliters.

1 gallon (gal) (U.S.)                 

231 cubic inches (exactly).

3.785 liters.

0.833 British gallon.

128 U.S. fluid ounces (exactly).

4 quarts (exactly).

8 pints (exactly).

32 gills (exactly).

1024 fluid drams (exactly).

[1 gallon (gal) (British Imperial)]   

277.42 cubic inches.

1.201 U.S. gallons.

4.546 liters.

160 British fluid ounces (exactly).

1 gill (gi)                           

7.219 cubic inches.

4 fluid ounces (exactly).

0.118 liter.

1 hectoliter (hL)                     

26.418 gallons.

2.838 bushels.

100 litters (exactly).

10 dekaliters (exactly).

1 kiloliter (kL)

10 hectoliters (exactly).

1000 liters (exactly).

1 liter (1 cubic decimeter exactly)   

1.057 liquid quarts.

0.908 dry quart.

61.025 cubic inches

10 deciliters (exactly).

1000 milliliters (exactly).

1 milliliter (mL)                     

0.271 fluid dram.

16.231 minims.

0.061 cubic inch.

1 ounce, fluid (or liquid) (fl oz or f ) (U.S.)

1.8047 cubic inches (exactly).

29.573 milliliters.

1.041 British fluid ounces.

9 fluid drams (exactly).

[1 ounce, fluid (fl oz) (British)]    

0.961 U.S. fluid ounce.

1.734 cubic inches.

28.412 milliliters.

1 peck (pk)

8.810 liters.

537.605 cubic inches (exactly).

8 quarts (exactly).

16 pints (exactly).

1 pint (pt), dry                     

33.600 cubic inches.

0.551 liter.

1 pint (pt), liquid

28.875 cubic inches (exactly).

0.473 liter.

4 gills (exactly).

16 fluid ounces (exactly).

128 fluid drams (exactly).

1 quart (qt), dry (U.S.)

67.2006 cubic inches (exactly).

1.101 liters.

0.969 British quarts.

2 pints (exactly).

1 quart (qt), liquid (U.S.)

57.75 cubic inches (exactly).

0.946 liter.

0.833 British quart.

2 pints (exactly).

32 fluid ounces (exactly).

256 fluid drams (exactly).

[1 quart (qt) (British)]              

69.354 cubic inches.

1.032 U.S. dry quarts.

1.201 U.S. liquid quarts.

1 tablespoon, measuring               

3 teaspoons (exactly).

15 milliliters.

4 fluid drams.

1/2 fluid ounce (exactly).

1 teaspoon, measuring                

1/3 tablespoon (exactly).

5 milliliters.

1-1/3 fluid drams.

1 water ton (English)                 

270.91 U.S. gallons.

224 British Imperial gallons (exactly).

1 assay ton (AT)

29.167 grams.

1 carat (c)                           

200 milligrams (exactly).

3.086 grains.

1 centigram (cg)

10 milligrams (mg) (exactly).

1 decigram (dg)

10 centigrams (exactly).

100 milligrams (exactly).

1 dekagram (dag)                            

10 grams (exactly).

1 dram apothecaries (dr ap or )  

60 grains (exactly).

3.888 grams.

1 dram avoirdupois (dr avdp)         

27-11/32 (= 27.344) grains.

1.777 grams.

1 gamma (y)

1 microgram (exactly).

1 grain

64.79891 milligrams (exactly).

1 gram (g)                            

15.432 grains.

0.035 ounce, avoirdupois.

10 decigrams (exactly).

1000 milligrams (exactly).

1 hectogram (hg)                            

10 deka grams (exactly).

100 grams (exactly).

1 hundredweight, gross or long (gross cwt)           

112 pounds (exactly).

50.802 kilograms.

1 hundredweight, gross or short (cwt or net cwt)

100 pounds (exactly).

45.359 kilograms.

1 kilogram (kg)

2.205 pounds.

10 hectograms (exactly).

1000 grams (exactly).

1 megagram (Mg)

1 metric ton (t) (exactly).

1000 kilograms (exactly).

1 microgram (ug) [the Greek letter mu in combination with the letter g]  

0.000 001 gram (exactly).

1 milligram (mg)

0.015 grain.

1 ounce, avoirdupois (oz avdp)        

437.5 grains (exactly).

0.911 troy or apothecaries ounce.

28.350 grams.

1 ounce, troy or apothecaries (oz t or oz ap or )

480 grains (exactly).

1.097 avoirdupois ounces.

31.103 grams.

1 pennyweight (dwt)

1.555 grams.

1 point                                

0.01 carat.

2 milligrams.

1 pound, avoirdupois (lb avdp)        

7000 grains (exactly).

1.215 troy or apothecaries pounds.

453.59237 grams (exactly).

1 pound, troy or apothecaries (lb t or lb ap)

5760 grains (exactly).

0.823 avoirdupois pound.

373.242 grams.

1 scruple (s ap or )               

20 grains (exactly).

1.296 grams.

1 ton, gross or long                

2240 pounds (exactly).

1.12 net tons (exactly).

1.016 metric tons.

1 ton, metric (t)                     

2204.623 pounds.

0.984 gross ton.

1.102 net tons.

1 ton, net or short                   

2000 pounds (exactly).

0.893 gross ton.

0.907 metric ton.