# # ======================= Unit section ============= # Base Unit # name symbol comment << Base Unit >> meter m # length kilogram kg # mass second s # time ampere A # electric current kelvin K # thermodynamic temperature mole mol # amount of substance candela cd # luminous intensity # Prefix symbol factor << Prefix >> yotta Y 10^{24} zetta Z 10^{21} exa E 10^{18} peta P 10^{15} tera T 10^{12} giga G 10^9 mega M 10^6 kilo k 10^3 hecto h 10^2 deci d 10^-1 centi c 10^-2 milli m 10^-3 micro u 10^-6 nano n 10^-9 pico p 10^{-12} femto f 10^{-15} atto a 10^{-18} zepto z 10^{-21} yocto y 10^{-24} # Derived Unit # name symbol unit comment # name must be in oneword <> gram g 0.001 kg # mass hour hr 3600. s # time minute min 60 s # time pound lb 0.45359237 kg # mass ounce oz 1.77185E-3 kg # mass inch in 2.54 cm # length foot ft 12 in # length mile mi 5280 ft # length yard yd 0.9144 m # length nautical_mile n_mi 6080 ft # length, nautical mile (UK) rood rood 1210 yd^2 # area, rood acre acre 4840 yd^2 # area, acre hertz Hz 1/s # frequency litre L 10^3/cm^3 # volume newton N m*kg/s^2 # force pound_force lbf 4.44822 N # force dyne dyn 1E-5 N # force pascal Pa N/m^2 # pressure, stress bar bar 1E5 Pa # pressure mmHg mmHg 1.33322E2 Pa # pressure, millimeter of mercury torr torr 1 mmHg # pressure atm atm 760 torr # standard atmosphere joule J N*m # energy, work, heat electronvolt eV 1.6021892E-19 J # energy calorie cal 4.1868 J # energy Btu Btu 1.05506E3 J # energy watt W J/s # power, radiant flux coulomb C A*s # electric charge volt V J/C # electric potential, electromotive force ohm ohm V/A # electric resistance, use this in /ANS ohm ohms V/A # electric resistance ohm Ohm V/A # electric resistance ohm Ohms V/A # electric resistance siemens S 1/Ohm # electric conductance farad F C/V # electric capacitance tesla T V*s/m^2 # magnetic flux density weber Wb V*s # magnetic flux henry H V*s/A # inductance radian rad m/m # plane angle degree deg 1.745329E-2 rad # plane angle (Pi rad=180 deg) steradian sr m^2 /m^2 # solid angle lumen lm cd*sr # luminous flux lux lx cd*sr/m^2 # illuminance becquerel Bq 1/s # activity (radioactive) gray Gy J/kg # absorbed dose (of radiation) sievert Sv J/kg # dose equivalent (dose equivalent index) astroUnit AU 1.49598E11 m # mean distance earth to sun