Units of Measurement

MEASUREMENTS UNITS - METER Meter: - Meter is 1,650, 763.73 times the wavelength of the orange light in vacuum emitted by 36K86 (Krypton) in the transition 2p10 to 5d5. The meter is length of the path travelled by the light in vacuum during a time interval of 1/299,792,458 of a second. (1983). It is denoted by m. Units of Meter: SI 1 meter (m) = 100 centimeters (cm) 1 meter = 1000 millimeters (mm) 1 meter = 10 decimeters (dm) 10 meter = 1 decameter (dm) 10 decameter = 1 hectometer (hm) 10 hectometers = 1 kilometer (km) 1 km (kilometer) = 1000m= 103 m 1 hm (hectometer)= 100m= 102 m 1 cm (centimeter) = 10mm = 10-2 m 1 fermi = 1f = 10-15 m 1 angstrom = 1A0 = 10-10 m 1 astronomical Unit = 1 AU (distance of the sun from the Earth =1.496×10-11 m 1 light year = 9.46×1015 m (distance that light travels with velocity of 3 ×108 m s-1 in 1 year) 1 parsec = 3.08×1016 m (distance corresponding to an annual parallax of one second).              English Standards of length (Imperial) Units of Length 1 inch = Diameter of halfpenny 7.92 inches = 1 link 12 inches = 1 foot 3 feet = 1 yard 6 feet = 1 fathom 5 ½ yards = 25 links 100 links = 66 feet 220 yards = 40 poles 8 furlongs = 80 chains 6080 feet per hour = 1 Admiralty knot 6080 feet = 1 nautical mile (British) Surface 144 square inches = 1 square foot 9 square feet = 1 square yard 30 ¼ square yards = 1 square pole, rod, or perch 40 square poles = 1 rood 4 roods = 4840 square yards = 1 acre 640 acres = 1 square mile Metric Standards and Equivalents The following equivalents of metric weights and measures in terms of imperial weights and measure for use in trade were sanctioned by an Order in Council on the 19th May. 1898 Linear Measure 1 inch = 2.54 centimeters 1 foot = 30.4799 centimeters 1 yard = 0.914399 meter 1 mile = 1.6093 kilometers = 5280 feet 1 chain = 20.1168 meters = 22 yards 1 centimeter = 0.39370113 inch 1 meter = 39.370113 inches = 3.28084 feet = 1.093614 yards. 1 kilometer = 0.62137 mile 1 radian = 57.296 degrees (angular measure)   Square Measure 1 square inch = 6.4516 square centimeters 1 square foot = 9.2903 square decimeters 1 square yard = 0.836126 square meter = 1 rood = 10.117 acres = 40 perches 1 acre = 0.40468 hectare 1 square mile = 259 hectares 1 square centimeter = 0.155 square inch. 1 square meter = 10.7639 square feet = 1.1960 square yards. 1 are = 119.6 square yards= 100 square meters 1 hectare = 2.4711 acres = 10,000 square meters   Cubic Measure 1 cubic inch = 16.387 cubic centimeters. 1 cubic foot = 0.028317 cubic meter = 28.317 litres 1 cubic yard = 0.76455 cubic meter = 764.55 litres 1 gallon = 4.545963 liters = 0.1605 cubic foot 1 U.S.A. gallon = 231 cubic inches = 0.83267 imperial gallon 1 liter = 1.7598 pints = 0.2200 gallon 1 cubic centimeter = 0.061 cubic inch. 1 cubic decimeter = 61.024 cubic inches. 1000 cubic centimeters = 1 liter = 0.0275 bushel 1 cubic meter = 35.3148 cubic feet = 1.307954 cubic yards