Linear Measures
Millimeter
1 mm = 0.039 inch
Centimeter
1 cm = 0.394 inch
Decimeter
1 dm = 3.937 inch
Meter
1 m = 1.0936 yard
= 3.281 feet
= 39.371 inch
Kilometer
1 km = 1000 meters
= 1093.637 yards
= 3280.869 feet
= 0.621 british mile
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Surface Measures
Square meters
1 qm = 1.196 square yard
= 10.764 square feet
= 1550 square inches
Are
1 a = 100 square meters
= 119.599 square yards
= 1076.410 square feet
Hectare
1 ha = 100 ares
= 10 000 square meters
= 2.471 acres
= 11960 square yards
= 107641 square feet
Square kilometer
1 qkm = 100 hectares
= 1 000 000 square meters
= 247 acres
= 0.386 square mile
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Cubic Measures
Cubic centimeter (1 cm3)
1 ccm = 1000 cubic millimeters
= 0.061 cubic inches
Cubic decimeter (1 dm3)
1 cdm = 1000 cubic centimeters
= 61.025 cubic inches
Cubic meter (1 m3)
1 cbm = 1000 cubic decimeters
= 1.308 cubic yard
= 35.316 cubic feet
Register ton
1 RT = 2.832 cbm
= 100 cubic feet
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Measures of Capacity
Liter
1 l = 10 deciliters
= 0.264 gallons (US)
= 1.057 quarts (US)
= 2.113 pints (US)
= 8.453 gills (US)
= 0.220 gallons (UK)
= 0.880 quarts (UK)
= 1.761 pints (UK)
= 7.043 gills (UK)
Hectoliter
1 hl = 100 liters
= 2.84 bushels (US)
= 26.418 gallons (US)
= 2.751 bushels (UK)
= 22 gallons (UK)
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Weights
Milligram
1 mg = 0.001 grams
= 0.0154 grains (troy)
1 g = 0.001 kilograms
= 15.4325 grains (troy)
Kilogram
1 kg = 1000 grams
= 2.205 pounds (avoirdupois)
= 2.679 pounds (troy)
Ton
1 t = 1000 kilograms
= 1.102 tons (US)
= 0.984 tons (UK)
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TemperaturesCelsius Fahrenheit Kelvin 0 32 273.15 10 50 283 20 68 293 30 86 303 40 104 313 100 212 373 -10 14 263 -20 -4 253 Converting Celsius to Fahrenheit: x is the temperature to be converted ( x Celsius * 9/5) + 32 = Fahrenheit Converting Fahrenheit to Celsius: y is the temperature to be converted ( y Fahrenheit - 32) * 5/9 = Celsius |
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SI Units Prefixes1024 = Yotta = Y = 1.000.000.000.000.000.000.000.000 1021 = Zetta = Z = 1.000.000.000.000.000.000.000 1018 = Exa = E = 1.000.000.000.000.000.000 1015 = Peta = P = 1.000.000.000.000.000 1012 = Tera = T = 1.000.000.000.000 109 = Giga = G = 1.000.000.000 106 = Mega = M = 1.000.000 103 = Kilo = k = 1.000 102 = Hecto = h = 100 101 = Deka = da = 10 10-1 = Deci = d = 0.1 10-2 = Centi = c = 0.01 10-3 = Milli = m = 0.001 10-6 = Micro = µ = 0.000.001 10-9 = Nano = n = 0.000.000.001 10-12 = Pico = p = 0.000.000.000.001 10-15 = Femto = f = 0.000.000.000.000.001 10-18 = Atto = a = 0.000.000.000.000.000.001 10-21 = Zepto = z = 0.000.000.000.000.000.000.001 10-24 = Yocto = y = 0.000.000.000.000.000.000.000.001 |
SI UnitsTime is measured in Seconds. 1 second is the time of 9.192.631.770 periods of the radiation of the Cesium 133 atom corresponding to the transition between the two hyperfine levels in ground state. Length is measured in Meter. 1 meter is the path of light during 1/299.792.458 of a second. Mass is measured in Kilogram. There is a prototype in my garage but you may want to refer to the one in Paris. Approximation: 1 dm3 H2O at 4o Celsius ~ 1 kg Electric current is measured in Ampere. 1 ampere is the current necessary in two parallel conductors of near zero diameter running infinitely through vaccum to apply a force of 2 x 10-7 newton per meter on each other. Temperature is measured in Kelvin. 1 kelvin is 1/273.16 of the temperature where water can exist simultaneously as ice, water and vapour. Amount of a substance is measured in Mole. 1 mole contains the number of particles that is equal the number of atoms in 0.012 kilograms of Carbon 12. Luminous intensity is measured in Candela. 1 candela is emitted by a source with a monochromatic radiation of 540 hertz and a radiant intensity of 1/683 watt per steradian. |
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