Calculators
Index

### Common Units of Length

Conversion Factors for Units of Length
1 inch = 2.54 centimeters
1 foot = 0.305 meter
1 yard = 0.914 meter
1 mile = 1.609 kilometers
1 nautical mile = 1.852 kilometers
1 centimeter = 0.39 inch
1 meter = 39.37 inches = 3.28 feet = 1.094 yards
1 kilometer = 0.62 mil

American and British Units of Length
1 inch (in.) = 1/36 yard = 1/12 foot
1 foot (ft) = 1/3 yard
1 yard (yd; basic unit of length
1 rod (rd) = 5 1/2 yards
1 furlong (fur.) = 220 yards = 1/8 mile
1 mile (mi) = 1,760 yards = 5,280 feet
1 fathom (fath) = 6 feet
1 nautical mile = 6,076.1 feet

Metric Units of Length
1 millimeter (mm) = 1/1,000 meter
1 centimeter (cm) = 1/100 meter
1 decimeter (dm) = 1/10 meter
1 meter (m; basic unit of length)
1 dekameter (dkm) = 10 meters
1 kilometer (km) = 1000 meters
1 Amstrom = 10-10 meters

Since the Mendenhall Order of 1893,
the U.S. yard and pound and all units derived from them
have been defined in terms of the metric units of length and mass,
the meter (m) and the kilogram (kg);
since 1959 these values are 1 yd = 0.9144 m and 1 lb = 0.45359237 kg.

In the United States, the older definition of the yard as 3,600/3,937 m
is still used for surveying, the corresponding foot (1,200/3,937 m) being
known as the survey foot.

### Common Units of Area

Metric Units of Area
1 square centimeter (sq cm.)= 1/10,000 square meter
1 square decimeter (sq dm.) = 1/100 square meter
1 square meter (sq m; basic unit of area)
1 are (a) = 100 square meters
1 hectare (ha) = 10,000 square meters = 100 ares
1 square kilometer (sq km.) = 1,000,000 square meters

Conversion Factors for Units of Area
1 square inch = 6.45 square centimeters
1 square foot = 0.093 square meter
1 square yard = 0.84 square meter
1 acre = 0.405 hectare
1 square mile = 2.59 square kilometers
1 square centimeter = 0.155 square inch
1 square meter = 1.2 square yards = 10.8 square feet
1 hectare = 2.47 acres
1 square kilometer = 0.386 square mile

Common Units of Area (American and British)
1 square inch (sq in.) = 1/1,296 square yard = 1/144 square foot
1 square foot (sq ft) = 1/9 square yard = 144 square inches
1 square yard (sq yd; basic unit of area) = 9 square feet
1 square rod (sq rd) = 30 1/4 square yards
1 acre = 4,840 square yards = 160 square rods
1 square mile (sq mi) = 3,097,600 square yards = 640 acre

### Common Units Of Volume And Capacity, Liquid And Dry

American and British Units of Volume and Capacity
1 cubic inch (cu in.) = 1/46,656 cubic yard = 1/1,728 cubic foot
1 cubic foot (cu ft) = 1/27 cubic yard = 1,728 cubic inches
1 cubic yard (cu yd) = 27 cubic feet
1 teaspoon = 1/3 tablespoon
1 tablespoon = 1/2 fluid ounce = 3 teaspoons
1 U.S. fluid ounce (fl oz) = 1/128 U.S. gallon = 1/16 U.S. pint
1 imperial fluid ounce (fl oz) = 1/160 imperial gallon
1 gill (gi) = 1/32 gallon = 4 fluid ounces
1 cup = 1/4 quart = 1/2 pint 8 fluid ounces
1 pint (pt) = 1/8 gallon = 1/2 quart = 16 fluid ounces
1 quart (qt) = 1/4 gallon = 32 fluid ounces
1 U.S. gallon (gal) = 231 cubic inches
1 imperial gallon (gal) = 277.4 cubic inches
1 dry pint (dry pt) = 1/64 bushel = 1/2 dry quart
1 dry quart (dry qt) = 1/32 bushel = 1/8 peck 1 peck (pk) = 1/4 bushel
1 U.S. bushel (bu) = 2,150.4 cubic inches
1 imperial bushel (bu) = 2,219.4 cubic inches

Metric Units of Volume and Capacity
1 cubic centimeter (cc) = 1/1,000,000 cubic meter
1 cubic decimeter (cu dm) = 1/1,000 cubic meter = 1,000 cubic decimeters
1 cubic meter (cu m) = 1 stere (s)
1 milliliter (ml) = 1/1,0000 liter = 1 cubic centimeter
1 centiliter (cl) = 1/100 liter = 10 milliliters
1 deciliter (dl) = 1/10 liter
1 liter = 1 cubic decimeter
1 dekaliter (dkl) = 10 liters
1 hectoliter (hl) = 100 liters= 1/10 cubic meter
1 kiloliter (kl) = 1,000 liters

Conversion Factors for Units of Volume and Capacity
1 cubic inch = 16.4 cubic centimeters
1 cubic foot = 0.0283 cubic meter
1 cubic yard = 0.765 cubic meter
1 fluid ounce = 29.6 milliliters
1 U.S. pint = 0.473 liter
1 U.S. quart = 0.946 liter
1 U.S. gallon = 0.84 imperial gallon =3.8 liters
1 imperial gallon = 1.2 U.S. gallons =4.5 liters
1 dry pint = 0.55 liters
1 dry quart = 1.1 liters
1 U.S. bushel = 0.97 imperial bushel = 35.24 liters
1 imperial bushel = 1.03 U.S. bushels = 36.37 liters
1 cubic centimeter = 0.06 cubic inch
1 cubic centimeter = 0.06 cubic inch
1 cubic meter = 1.3 cubic yards
1 milliliter = 0.034 fluid ounce
1 liter = 1.06 U.S.quarts = 0.9 dry quart
1 dekaliter = 0.28 U.S. bushel

The U.S. gallon, or wine gallon, is 231 cubic inches (cu in.);
The British imperial gallon is the volume of 10 lb of pure water at 62 degrees Fahrenheit and is equal to 277.42 cu in.

The U.S. bushel, or Winchester bushel, is 2,150.42 cu in.
British imperial bushel of 2,219.36 cu in.

### Common Units of Weight or Mass

Common Units of Weight of Mass American and British Units
1. Avoirdupois
1 grain = 1/7,000 pound = 1/437.5 ounce
1 dram (dr) = 1/256 pound= 1/16 ounce
1 ounce (oz) = 1/16 pound
1 pound (lb; basic unit of weight or mass)
1 short hundredweight = 100 pounds
1 long hundredweight = 112 pounds
1 short ton = 2,000 pounds
1 long ton = 2,240 pounds

Common Units of Weight or Mass American and British Units (Metric Units)
1 milligram (mg) = 1/1,000,000 kilogram = 1/1,000 gram
1 centigram (cg) = 1/100,000 kilogram = 1/100 gram
1 decigram (dg) = 1/10,000 kilogram = 1/10 gram
1 gram (g) = 1/1,000 kilogram
1 dekagram (dkg) = 1/100 kilogram = 10 grams
1 hectogram (hg) = 1/10 kilogram = 100 grams
1 kilogram (kg; basic unit of wieght or mass
1 metric ton (t) = 1,000 kilograms

Conversion Factors for Units of Weight or Mass
1 grain = 64 milligrams
1 ounce (avoirdupois) = 28.35 grams
1 pound (avoirdupois) = 0.45 kilogram = 1.2 troy or apothecaries' pounds
1 troy or apothecaries' pound = 0.37 kilogram
1 short ton = 0.9 metric ton
1 milligram = 0.015 grain
1 gram = 0.035 ounce (avoirdupois)
1 kilogram= 2.205 pounds (avoirdupois)
1 metric ton = 1.1 short ton

Standard
1 lb = 0.45359237 kg
1 kg = 2.204622621849 lb = 35.27396194958 oz

### Temperature Conversion

Water freezes at 273.15 K and boils at 373.15 K
Water as 0 C and the boiling point as 100 C
Water as 32 F and the boiling point as 212 F

C = (100/180) * ( F - 32)
F = (1.8 * C) + 32

K = C + 273.15
C = K - 273.15

K = [(100/180) * ( F - 32)] + 273.15
F = [1.8 * ( K - 273.15)] + 32

ONLINE CALCULATORS for Unit Conversion