Weights and measures
Metric EquivalentUS Equivalent

acre0.404 685 64 hectares43,560 feet
acre4,046,856 4 meters4,840 yards
acre0.004 046 856 4 kilometers0.001 562 5 miles, statute
acre100 meters119.599 yards
cable219.456 meters120 fathoms
chain (surveyor's)20.116 8 meters66 feet
cord (wood)3.624 556 meters128 feet
fathom1.828 8 meters6 feet
foot 30.48 centimeters12 inches
foot 0.304 8 meters 0.333 333 3 yards
foot 0.000 304 8 kilometers 0.000 189 39 miles, statute
foot 929.030 4 centimeters144 inches
foot 0.092 903 04 meters0.111 111 1 yards
foot 28.316 846 592 liters7.480 519 gallons
foot 0.028 316 847 meters 1,728 inches
furlong201.168 meters 220 yards
hand (height of horse) 10.16 centimeters4 inches
hectare10,000 meters2.471 053 8 acres
inch 2.54 centimeters 0.083 333 33 feet
inch 6.451 6 centimeters0.006 944 44 feet
inch 16.387 064 centimeters 0.000 578 7 feet
inch 16.387 064 milliliters 0.029 761 6 pints, dry
inch 16.387 064 milliliters 0.034 632 0 pints, liquid
kilometer1,000 meters 0.621 371 19 miles, statute
kilometer100 hectares 247.105 38 acres
kilometer1,000,000 meters 0.386 102 16 miles, statute
kilometers 0.755 miles, nautical
knot (1 nautical mi/hr) 1.852 kilometers/hour1.151 statute miles/hour
league, nautical 5.559 552 kilometers 3 miles, nautical
league, statute4.828.032 kilometers 3 miles, statute
link (surveyor's)20.116 8 centimeters 7.92 inches
meter100 centimeters1.093 613 yards
meter10,000 centimeters 1.195 990 yards
meter1,000 liters 1.307 951 yards
micron 0.000 001 meter0.000 039 4 inches
mil0.025 4 millimeters0.001 inch
mile, nautical 1.852 kilometers 1.150 779 4 miles, statute
mile, nautical 3.429 904 kilometers 1.325 miles, statute
mile, statute1.609 344 kilometers 5,280 feet or 8 furlongs
mile, statute258.998 811 hectares 640 acres or 1 section
mile, statute2.589 988 11
pace 76.2 centimeters 30 inches
point (typographical)0.351 459 8 millimeters0.013 837 inches
rod5.029 2 meters 5.5 yards
section (US) 2.589 988 1 kilometers 1 mile, statute or 640 acres
span 22.86 centimeters9 inches
stere1 meter1.307 95 yards
ton, register2.831 684 7 meters 100 feet
township (US)93.239 572 kilometers36 miles, statute
yard 0.914 4 meters 3 feet
yard 0.836 127 36 meters9 feet
yard 0.764 554 86 meters27 feet

Units
(Temperature)
Metric EquivalentUS Equivalent

degrees, Celsius (water boils at 100 degrees C, freezes at 0 degrees C)multiply by 1.8 and add 32 to obtain degrees F
degrees, Fahrenheitsubtract 32 and divide by 1.8 to obtain degrees Cwater boils at 212 degrees F, freezes at 32 degrees F)

Units
(Volume)
Metric EquivalentUS Equivalent

barrel (petroleum, US)
(proof spirits, US)
(beer, US)
158.987 29 liters
151.416 47 liters
117.347 77 liters
42 gallons
40 gallons
31 gallons
bushel 35.239 07 liters 4 pecks
cup0.236 588 2 liters 8 ounces, liquid (US)
dram, avdp.1.771 845 2 grams0.0625 5 ounces, avdp.
dram, troy 3.887 934 6 grams0.125 ounces, troy
dram, liquid(US) 3.696 69 milliliters 0.125 ounces, liquid
gallon, liquid (US)3.785 411 784 liters 4 quarts, liquid
gill (US)118.294 118 milliliters4 ounces, liquid
liter0.001 meters 61.023 74 inches
liter0.1 dekaliter0.908 083 quarts, dry
liter1,000 milliliters1.056 688 quarts, liquid
minim (US) 0.061 611 52 milliliters 0.002 083 33 ounces, liquid or one-sixtieth of a dram
peck 8.809 767 5 liters 8 quarts, dry
pint, dry (US) 0.550 610 47 liters0.5 quarts, dry
pint, liquid (US)0.473 176 473 liters 0.5 quarts, liquid
quart, dry (US)1.101 221 liters 2 pints, dry
quart, liquid (US) 0.946 352 946 liters 2 pints, liquid
tablespoon 14.786 76 milliliters3 teaspoons
teaspoon 4.928 922 milliliters0.333 333 tablespoons
yard 764.554 857 984 liters 201.974 gallons

Units
(Weight)
Metric EquivalentUS Equivalent

grain64.798 91 milligrams 0.002 285 71 ounces, advp.
gram 1,000 milligrams 0.035 273 96 ounces, advp.
hundredweight, long50.802 345 kilograms 112 pounds, avdp.
hundredweight, short 45.359 237 kilograms 100 pounds, avdp.
kilogram 0.001 tons, metric 2.204 623 pounds, avdp.
ounce, avdp. 28.349 523 125 grams 437.5 grains
ounce, liquid (US) 29.573 53 milliliters0.062 5 pints, liquid
ounce, troy31.103 476 8 grams 480 grains
pennyweight1.555 173 84 grams 24 grains
pound, avdp453.592 37 grams 16 ounces, avdp
pound, troy373.241 721 6 grams12 ounces, troy
quintal100 kilograms220.462 26 pounds, avdp.
scruple1.295 978 2 grams20 grains
ton, long or deadweight 1,016.046 909 kilograms2,240 pounds, avdp.
ton, metric1,000 kilograms2,204.623 pounds, avdp.
ton, metric1,000 kilograms32,150.75 ounces, troy
ton, short 907.184 74 kilograms 2,000 pounds, avdp.

MATHEMATCIAL NOTATIONS

Mathematical Power Name

10^18 or 1,000,000,000,000,000,000 one quintillion
10^15 or 1,000,000,000,000,000 one quadrillion
10^12 or 1,000,000,000,000 one trillion
10^9 or 1,000,000,000one billion
10^6 or 1,000,000one million
10 or 1,000one thousand
10 or 100one hundred
10^1 or 10 ten
10^0 or 1one
10-^1 or 0.1 one-tenth
10- or 0.01one-hundredth
10- or 0.001 one-thousandth
10-^6 or 0.000 001 one-millionth
10-^9 or 0.000 000 001 one-billionth
10-^12 or 0.000 000 000 001one-trillionth
10-^15 or 0.000 000 000 000 001one-quadrillionth
10-^18 or 0.000 000 000 000 000 00 one-quintillionth

Metric Relationships
PrefixSymbol Length, weight, or capacity Area Volume
exa E10^18 10610^54
petaP10^15 10010^45
teraT10^12 104106
gigaG10^910^18107
megaM10^610^1210^18
hectokilo hk 10^510^1010^15
myria ma 10^410^8 10^12
kilok1010^6 10^9
hecto h1010^4 10^6
basic unit-1 meter, 1 gram, 1 liter 1 meter1 meter
decid10-^1 10-10-
centi c10- 10-^410-^6
milli m10- 10-^610-^9
decimilli dm 10-^4 10-^810-^12
centimillicm 10-^5 10-^10 10-^15
micro u10-^6 10-^12 10-^18
nanon10-^9 10-^18 10-7
picop10-^1210-4 10-6
femto f10-^1510-0 10-^45
attoa10-^1810-6 10-^54
Use the above table to convert units. For example, for converting from kilometers to meters, multiply by 1,000 (5.32 kilometers equals 5,320 meters) or to convert from meters to kilometers, multiply by 0.001 (5,320 meters equals 5.32 kilometers).