Weights
1 gram 0.03527 ounce 1 ounce 28.35 grams
1 kilogram 2.2016 pounds 1 pound 0.4536 kilograms
1 metric ton 1.1023 English tons 1 English ton 0.9072 metric tons
Square Measure
1 sq. centimeter 0.1550 square inches 1 sq. inch 6.452 sq. centimeters
1 sq. decimeter 0.10176 square feet 1 sq. foot 9.2903 sq. decimeters
1 sq. meter 1.196 square yards 1 square yard 0.8361 sq. meters
1 acre 160 square rods 1 square rod 0.00625% of an acre
1 hectare 2.47 acres 1 acre 0.4074 hectare
1 sq. kilometer 0.386 square miles 1 square mile 2.59 kilometers
Linear Measure
1 centimeter 0.3937 inches 1 inch 2.54 centimeters
1 decimeter 3.937 inches 1 foot 3.048 decimeters
1 meter 39.37 inches 1 yard 0.9144 meters
1 dekameter 1.9884 rods 1 rod 0.5029 dekameters
1 kilometer 0.62137 miles 1 mile 1.6093 kilometers
Measure of Volume
1 cubic centimeter 0.062 cubic inches 1 cubic inch 16.39 cubic centimeters
1 cubic decimeter 0.0353 cubic feet 1 cubic foot 28.347 cubic decimeters
1 cubic meter 1.308 cubic yards 1 cubic yard 0.7646 cubic meters
1 stere 0.2759 cords 1 cord 3.624 steres
1 liter 0.908 quarts dry 1 liter 1.0567 quarts liquid
1 quart dry 1.101 liters 1 quart liquid 0.9463
1 decaliter 2.6417 gallons 1 gallon .3785 decaliter
1 peck 0.881 decaliters 1 hectoliter 2.8375 bushels
1 bushel 0.3524 hectoliters
Approximate Equivalents
1 decimeter 4 inches 1 liter 1.06qts. Fl., 0.9 qt. Dry
1 meter 1.1 yards 1 kilometer 5/8 mile
1 hectoliter 2-5/8 bushels 1 hectare 2-1/2 acre
1 kilogram 2-1/5 pounds 1 cubic meter 1/4 of a cord
1 metric ton 1.1 English tons
Length
inch (in.) 24,400 mircron (æ)
inch (in.) 2.54 centimeter (cm)
inch (in.) 0.0254 meter (m)
foot (ft) 0.3048 meter (m)
yard (yd) 0.9144 meter (m)
Force
kip (1000 lb) 453.6 kilogram (kg)
kip (1000 lb) 4,448.22 newton (N)
pound (lb) 0.4535924 kilogram (kg)
avoirdupois
pound (lb) 4.448222 newton (N)
Pressure or Stress
kip per square inch (ksi) 6.894757 megapascal (Mpa)
kip per square inch (ksi) 70.31 kilogram per square centimeter (kg/sq cm)
pound per square foot (pdf) 4.8824 kilogram per square meter (kg/sq m)
pound per square foot (pdf)  47.88  pascal (Oa)
pound per square inch (psi) 0.07031 kilogram per square centimeter (kg/sq cm)
pound per square inch (psi) 6,894.76 pascal (Oa)
pound per square inch (psi) 0.00689476 megapascal (Mpa)
Area
square foot (sq ft) 0.09290304 square meter (sq m)
square inch (sq in.) 6.452 square centimeter (sq cm)
square inch (sq in.) 0.00064516 square meter (sq m)
square yard (sq yd) 0.8361274 square meter (sq m)
Mass (weight)
pound (lb) 0.4535924 kilogram (kg)
avoirdupois
ton (2000lb) 907.1848 kilogram (kg)
grain 0.0000648 kilogram (kg)
Mass (weight) per length
kip per linear foot (klf) 0.001488 kilogram per meter (kg/m)
pound per linear foot (plf)  1.488 kilogram per meter (kg/m)
Mass per volume (density)
pound per cubic foot (pcf) 16.01846 kilogram per cubic meter (kg/ce m)
pound per cubic yard (lb/cu yd) 0.5933 kilogram per cubic meter (kg/ce m)
Temperature
degree Fahrenheit (°F) tC=(tF-32)/1.8 degree Celsius (°C)
degree Fahrenheit (°F) tK=(tF+459.7)/1.8 degree Kelvin (°K)
degree Kelvin (°K) tC=tK-273.15 degree Celsius (°C)