manual:chapter3:units

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Unit Unit name Definition Description
1_m metre 1_m Base SI unit of length
1_cm centimetre 1_cm = 0.01_m SI length
1_mm millimetre 1_mm = 0.001_m SI length
1_yd yard 1_yd = 3_ft US customary length
1_ft foot 1_ft = 12_in US customary length
1_in inch 1_in = 0.0254_m US customary length
1_Mpc megaparsec 1_Mpc = 1000000_pc Astronomical length
1_pc parsec 1_pc = (648000/π)_au Astronomical length
1_lyr light year 1_lyr = 365.25_d*c Astronomical length
1_au astronomical unit 1_au = 149597870700_m SI astronomical length
1_km kilometre 1_km = 1000_m SI length
1_mi mile 1_mi = 5280_ft US customary length
1_nmi nautical mile 1_nmi = 1852_m non-SI length
1_miUS surveying mile 1_miUS = 5280_ftUS US surveying length
1_chain surveying chain 1_chain = 66_ftUS US surveying length
1_rd rod 1_rd =16.5_ft US customary length
1_rdUS surveying rod 1_rdUS =16.5_ftUS US surveying length
1_fath surveying fathom 1_fath =6_ftUS US surveying length
1_ftUS surveying foot 1_ftUS = 1200/3937_m US surveying length
1_mil thousandth of inch 1_mil = 0.001_in US customary length
1_µ micron or micrometre 1_µ = 1_µm SI length
1_Å Ångström 1_Å = 0.1_nm non-SI length
1_fermi fermi or femtometre 1_fermi = 1_fm SI length
1_m^2 square metre 1_m^2 Base SI unit of area
1_cm^2 square centimetre 1_cm^2 = 0.000 1_m^2 SI area
1_b barn 1_b = 1E-28_m^2 non-SI area
1_yd^2 square yard 1_yd^2 = 9_ft^2 US customary area
1_ft^2 square foot 1_ft^2 = 144_in^2 US customary area
1_in^2 square inch 1_in^2 = 6.4516_cm^2 US customary area
1_km^2 square kilometre 1_km^2 = 1E6_m^2 SI area
1_ha hectare 1_ha = 1_hm^2 SI area (deprecated)
1_a are 1_a = 100_m^2 non-SI area
1_mi^2 square mile 1_mi^2 = 9_ft^2 US customary area
1_miUS^2 survey square mile 1_miUS^2 = 9_ftUS^2 US surveying area
1_acre acre 1_acre = 4840_yd^2 US customary area
1_m^3 cubic metre 1_m^3 Base SI unit of volume
1_cm^3 cubic centimetre 1_cm^3 = 1E-6_m^3 SI volume
1_ml millilitre 1_ml = 1_cm^3 SI volume
1_l litre 1_l = 0.001_m^3 SI volume
1_st stere 1_st = 1_m^3 non-SI volume
1_yd^3 cubic yard 1_yd^3 = 27_ft^3 US customary volume
1_ft^3 cubic foot 1_ft^3 = 1728_in^3 US customary volume
1_in^3 cubic inch 1_in^3 = 16.387064_cm^3 US customary volume
1_gal gallon 1_gal = 231_in^3 US customary volume
1_qt quart 1_qt = 1/4_gal US customary volume
1_pt pint 1_pt = 1/8_gal US customary volume
1_cu cup 1_cu = 1/16_gal US customary volume
1_ozfl fluid ounce 1_ozfl = 1/128_gal US customary volume
1_tbsp table spoon 1_tbsp = 1/2_ozfl US customary volume
1_tsp tea spoon 1_tsp = 1/6_ozfl US customary volume
1_fbm board foot 1_fbm = 144_in^3 US customary volume
1_galUK gallon (UK) 1_galUK = 0.00454609_m^3Imperial volume
1_qtUK quart (UK) 1_qtUK = 1/4_galUKImperial volume
1_ptUK pint (UK) 1_ptUK = 1/8_galUKImperial volume
1_ozUK ounce (UK) 1_ozUK = 1/160_galUK US customary volume
1_galC gallon (Canada) 1_galC = 1_galUKCanadian volume
1_qtC quart (Canada) 1_qtC = 1_qtUKCanadian volume
1_ptC pint (Canada) 1_ptC = 1_ptUKCanadian volume
1_ozC ounce (Canada) 1_ozC = 1_ozUKCanadian volume
1_bbl oil barrel 1_bbl = 42_galoil industry volume
1_bu bushel (US) 1_bu = 2150.42_in^3 US customary volume
1_pk peck (US) 1_pk = 1/4_bu US customary volume
1_buUK bushel (UK) 1_buUK = 8_galUKImperial volume
1_pkUK peck (UK) 1_pkUK = 1/4_buUKImperial volume
1_buC bushel (Canada) 1_buC = 8_galCCanadian volume
1_pkC peck (Canada) 1_pkC = 1/4_buCCanadian volume
1_yr tropical year 1_yr = 31556925.9747_sper 1952 Ephemeris Time
1_d day 1_d = 86400_s SI time
1_h hour 1_h = 3600_s SI time
1_min minute 1_min = 60_s SI time
1_s second 1_s Base SI unit of time
1_Hz Hertz 1_Hz = 1_1/s SI frequency
1_m/s metres per second 1_m/s Base SI unit of speed
1_cm/s centimetres per second 1_cm/s = 0.0 1_m/s SI speed
1_ft/s feet per second 1_ft/s = 12_in/s US customary speed
1_kph kilometres per hour 1_kph = 1_km/h SI speed
1_mph miles per hour 1_mph = 1_mi/h SI speed
1_knot nautical knot 1_knot = 1_nmi/h non-SI speed
1_c speed of light 1_c = 299792458_m/s non-SI speed
1_r/s radians per second 1_r/s Base SI angular speed
1_rpm revolutions per minute 1_rpm = 1_tr/min non-SI speed
1_tr/s turns per second 1_tr/s = 2π_r/s non-SI speed
1_kg kilogram 1_kg Base SI unit of mass
1_g kilogram 1_g = 0.00 1_kg SI mass
1_lb pound 1_lb = 7000_grain US customary mass
1_oz ounce 1_oz = 1/16_lb US customary mass
1_slug slug 1_slug = 1_lb*s^2/ft*ga US customary mass
1_lbt troy pound 1_lbt = 5760_grain US customary mass
1_ton tonne 1_ton = 2000_lb US customary mass
1_tonUK tonne (UK) 1_tonUK = 2240_lbImperial mass
1_t metric tonne 1_t = 1000_kg non-SI mass
1_ozt troy ounce 1_ozt = 480_grainImperial mass
1_ct metric carat 1_ct = 200_mgMetric System mass
1_grain grain 1_grain = 64.7989 1_mgImperial mass
1_u unified atomic mass 1_u = 1.660539040E-27_kg non-SI mass
1_mol mole 1_mol Base SI amount of substance
1_gmol gram mole 1_gmol = 1_mol non-SI amount of substance
1_lbmol pound mole 1_lbmol = 453.59237_mol US customary substance
1_N Newton 1_N = 1_kg*m/s^2 SI force
1_dyn dyne 1_dyn = 1_g*cm/s^2 non-SI force
1_gf gram-force 1_gf = 1_g*ga non-SI force
1_kip kip 1_kip = 1000_lbf US customary force
1_lbf pound-force 1_lbf = 1_lb*ga US customary force
1_pdl poundal 1_pdl = = 1_lb*ft/s^2 US customary force
1_J Joule 1_J = 1_N*m SI energy
1_kW*h kilowatt-hour 1_kW*h = 3.6_MJ non-SI energy
1_erg erg 1_erg = 1_dyn*cm non-SI energy
1_kcal kilo calorie 1_kcal = 1000_cal non-SI energy
1_cal calorie 1_cal = 4.184_J non-SI energy
1_Btu british thermal unit 1_Btu = =1055.056_JImperial energy
1_ft*lbf foot-pound 1_ft*lbf = 1_lb*ft*ga US customary energy
1_therm therm 1_therm = 100000_BtuImperial energy
1_MeV mega electronvolt 1_MeV = 1E6_eV non-SI energy
1_eV electronvolt 1_eV = 1.6021766208E-19_J non-SI energy
1_W Watt 1_W = 1_J/s SI power
1_kW kilowatt 1_kW = 1000_W SI power
1_MW megawatt 1_MW = 1000000_W SI power
1_hp mechanical horsepower 1_hp = 550_ft*lbf/sImperial power
1_lbf*ft/s pound-foot per second 1_ft*lbf/sImperial power
1_Pa Pascal 1_Pa = 1_N/m^2 SI pressure
1_atm atmospheric pressure 1_atm = 101325_Pa non-SI pressure
1_bar bar 1_bar = 100000_Pa non-SI pressure
1_p SI pound per square inch 1_p SI = 1_lbf/in^2 US customary pressure
1_Torr Torricelli 1_Torr = 1/760_atm non-SI pressure
1_mmHg millimetres of mercury (at 0°C) 1_mmHg = 13595. 1_kg/m^3*mm*ga non-SI pressure
1_inHg inches of mercury (at 0°C) 1_inHg = 13595. 1_kg/m^3*in*ga non-SI pressure
1_inH2O inches of water (at 4°C) 1_inH2O = 999.972_kg/m^3*in*ga non-SI pressure
1_°C celsius (or degree celsius) 1_°C Zero: 0_°C → 273.15_K Base SI temperature (rel. scale)
1_Δ°C celsius temperature change 1_Δ°C= 1_ΔKchange of temperature
1_°F farenheit (or degree farenheit) 1_°F Zero: 0_°F → 459.67_°R US cust. temp. (rel. scale)
1_Δ°F farenheit temperature change 1_Δ°F= 1_Δ°Rchange of temperature
1_K kelvin 1_K Base SI temperature (abs. scale)
1_ΔK kelvin temperature change 1_ΔKbase change of temperature
1_°R rankine 1_°R = 5/9_KImperial temperature (abs. scale)
1_Δ°R rankine temperature change 1_Δ°R = 5/9_ΔKchange of temperature
1_V volt 1_V = 1_J/C SI potential difference
1_A ampere 1_A Base SI electric current
1_C coulomb 1_C = 1_A*s SI electrical charge
1_Ω ohm 1_Ω = 1_V/A SI electrical resistance
1_F farad 1_F = 1_C/V SI electrical capacity
1_A*h ampere-hour 1_A*h = 3600_C non-SI electrical charge
1_Fdy faraday 1_Fdy = 96485.33289_C non-SI electrical charge
1_H henry 1_H = 1_Wb/A SI inductance
1_mho mho (Siemens) 1_mho = 1_S non-SI conductance
1_S siemens 1_S = 1_1/Ω SI conductance
1_T tesla 1_T = 1_Wb/m^2 SI magnetic flux density
1_Wb weber 1_Wb = 1_kg*m^2/A/s^2 SI magnetic flux
1_° degree 1_° = 2π/360_r non-SI plane angle
radian 1_r Base SI plane angle
1_grad grad (gon) 1_grad = 2π/400_r non-SI plane angle
1_tr full turn (one revolution) 1_tr = 2π_r non-SI plane angle
1_arcmin arc minute 1_arcmin = 1/60_° non-SI plane angle
1_arcs arc second 1_arcmin = 1/3600_° non-SI plane angle
1_sr steradian 1_sr Base SI solid angle
1_fc foot-candle 1_fc = 1_lm/ft^2 non-SI illuminance
1_flam footlambert 1_flam = 1/π_cd/ft^2 non-SI illuminance
1_lx lux 1_lx = 1_lm/m^2 SI illuminance
1_ph phot 1_ph = 1_lm/cm^2 non-SI illuminance
1_sb stilb 1_sb = 1_cd/cm^2 non-SI illuminance
1_lm lumen 1_lm = 1_cd*sr SI luminous flux
1_cd candela 1_cd Base SI luminous intensity
1_lam lambert 1_lam = 10000/π_cd/m^2 non-SI illuminance
1_Gy gray 1_Gy = 1_J/kg SI radiation
1_rad rad 1_rad = 0.0 1_Gy non-SI radiation
1_rem roentgen equivalent man 1_rem = 1_erg/g SI radiation
1_Bq becquerel 1_Bq = 1_1/s SI radiation
1_Ci curie 1_Ci = 3.7E10_Bq non-SI radiation
1_R rontgen 1_R = 2.58E-4_C/kg non-SI radiation
1_P poise 1_P = 0.0 1_Pa*s non-SI dynamic viscosity
1_St stokes 1_St = 0.000 1_m^2/s non-SI kinematic viscosity
1_m^2/s square metre per second 1_m^2/s SI kinematic viscosity
1_kg/(m*s) kilogram per metre per second 1_kg/(m*s) = 1_Pa*s SI dynamic viscosity
1_m/s^2 metre per second squared 1_m/s^2 SI acceleration
1_cm/s^2 centimetre per second squared 1_cm/s^2 = 0.0 1_m/s^2 SI acceleration
1_ft/s^2 foot per second squared 1_ft/s^2 US customary acceleration
1_ga acceleration of gravity 1_ga = 9.80665_m/s^2 non-SI acceleration
1_r/s^2 radian per second squared 1_r/s^2 SI angular acceleration
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  • Last modified: 2018/10/18 09:02
  • by claudio