Symbol (the (*) indicates non-standard units)compute: % percent 10–2 A Ampere A a year 3.15576×10+7s a0 (Bohr radius) 5.29177×10–11m al light-year 9.46053×10+15m alpha (fine structure constant) 7.29735×10–3 Angstroem Angstroem(0.1nm) 10–10m Angstrom Angstroem(0.1nm) 10–10m arcm minute of arc 4.62963×10–5 arcmin minute of arc 4.62963×10–5 arcs second of arc 7.71605×10–7 arcsec second of arc 7.71605×10–7 atm atmosphere 1.01325×10+5Pa (kg⋅m–1⋅s–2) AU astronomical unit 1.49598×10+11m au atomic unit bar bar(10+5Pa) 10+5Pa (kg⋅m–1⋅s–2) barn barn(10–28m2) 10–28m+2 beam beam bit binary information unit byte byte(8bits) C Coulomb C (s⋅A) c c(speed_of_light) 2.99792×10+8m⋅s–1 cal calorie 4.1854J (kg⋅m+2⋅s–2) cd candela(lumen/sr) cd cKayser centi-Kayser(cm–1) m–1 Crab Crab (X-ray) flux 1.43×10–11kg⋅s–3 ct count D Debye (dipole) 3.33333×10–30m⋅s⋅A d day 8.64×10+4s deg degree 2.77778×10–3 degC Celsius K degF Fahrenheit 5.55556×10–1K degree degree 2.77778×10–3 dyn dyne(10–5N) 10–5N (kg⋅m⋅s–2) e e(electron_charge) 1.60218×10–19C (s⋅A) Earth Earth (geo) unit eps0 (electric constant) 8.85419×10–12kg–1⋅m–3⋅s+4⋅A+2 erg erg(10–7J) 10–7J (kg⋅m+2⋅s–2) eV electron-Volt 1.60218×10–19J (kg⋅m+2⋅s–2) F Farad F (kg–1⋅m–2⋅s+4⋅A+2) G G(gravitation constant) 6.673×10–11kg–1⋅m+3⋅s–2 g gram 10–3kg gauss Gauss(10–4T) 10–4T (kg⋅s–2⋅A–1) geoMass Earth mass 5.9742×10+24kg H Henry H (kg⋅m+2⋅s–2⋅A–2) h hour 3.6×10+3s h hour 3.6×10+3s \h hbar(Planck constant) 1.05457×10–34kg⋅m+2⋅s–1 hr hour(use 'h') 3.6×10+3s Hz Herz Hz (s–1) inch inch 2.54×10–2m J Joule J (kg⋅m+2⋅s–2) JD Julian Day 8.64×10+4s jovMass Jupiter mass 1.8986×10+27kg Jup Jupiter (jovian) unit Jy Jansky(10–26W/m2/Hz) 10–26kg⋅s–2 K Kelvin K k k(Boltzmann) 1.38065×10–23kg⋅m+2⋅s–2⋅K–1 kg kilogram kg l litre 10–3m+3 lm lumen 7.95775×10–2cd Lsun solar luminosity 3.826×10+26W (kg⋅m+2⋅s–3) lx lux(lm/m2) 7.95775×10–2m–2⋅cd lyr light-year (c*yr) 9.46053×10+15m m metre m mag magnitude mag mas milli-second of arc 7.71605×10–10 me me(electron_mass) 9.10938×10–31kg Mgeo Earth mass 5.9742×10+24kg min minute 6×10+1s MJD Mod. Julian Date (JD–2400000.5) 8.64×10+4s Mjup Jupiter mass 1.8986×10+27kg mmHg mercury_mm 1.33322×10+2Pa (kg⋅m–1⋅s–2) mol mole mol month month mp mp(proton_mass) 1.67266×10–27kg Msun solar mass 1.989×10+30kg mu0 (magnetic constant) 1.25664×10–6kg⋅m⋅s–2⋅A–2 muB (Bohr magneton) 9.27401×10–28m+2⋅A N Newton N (kg⋅m⋅s–2) Ohm Ohm(V/A) Ohm (kg⋅m+2⋅s–3⋅A–2) Pa Pascal Pa (kg⋅m–1⋅s–2) pc parsec 3.0857×10+16m ph photon pi pi(=3.14...) 3.14159 pix pixel ppm part per million 10–6 R R(gas_constant) 8.3143kg⋅m+2⋅s–2⋅K–1⋅mol–1 rad radian 1.59155×10–1 Rgeo Earth radius (eq) 6.3781×10+6m Rjup Jupiter radius (eq) 7.1492×10+7m Rsun solar radius 6.9599×10+8m Ry Rydberg(13.6eV) 2.17989×10–18J (kg⋅m+2⋅s–2) S Siemens(A/V) S (kg–1⋅m–2⋅s+3⋅A+2) s second s sec second (use 's') s solLum solar luminosity 3.826×10+26W (kg⋅m+2⋅s–3) solMass solar mass 1.989×10+30kg solRad solar radius 6.9599×10+8m sr steradian 7.95775×10–2 Sun Solar unit T Tesla T (kg⋅s–2⋅A–1) t ton 10+3kg u atomic mass unit 1.66054×10–27kg uas micro-second of arc 7.71605×10–13 V Volt V (kg⋅m+2⋅s–3⋅A–1) W Watt W (kg⋅m+2⋅s–3) Wb Weber(V⋅s) Wb (kg⋅m+2⋅s–2⋅A–1) yr year 3.15576×10+7s ° degree 2.77778×10–3 °C Celsius K °F Fahrenheit 5.55556×10–1K µ0 (magnetic constant) 1.25664×10–6kg⋅m⋅s–2⋅A–2 µas micro-second of arc 7.71605×10–13 Å Angstroem(0.1nm) 10–10m "d:m:s" degree arcminute arcsecond (sexagesimal angle from degree)2.77778×10–3 "date" Fully qualified date 8.64×10+4s "datime" Fully qualified date/time 8.64×10+4s "day" Day of month number 8.64×10+4s "h:m:s" hour minutes seconds (sexagesimal time from hours)3.6×10+3s "h:m" hour minutes (sexagesimal time from hours)3.6×10+3s "HH:MM:SS" hour minutes seconds (sexagesimal time)3.6×10+3s "HHMMSS" hour minutes seconds (sexagesimal time without separator)3.6×10+3s "m:s" minutes seconds (sexagesimal time from minutes)6×10+1s "MM/YY" Month/Year(from 1900) 2.6298×10+6s "MM/yy" Month/Year(from 2000) 2.6298×10+6s "month" Month name or number 2.6298×10+6s "Y-M-D,h:m:s" Fully qualified date/time 8.64×10+4s ===List of possible conversion ===================== — => s (Angle to time) m => Hz (Wavelength to frequency) Hz => J (Frequency to Energy) m => J (Wavelength to Energy) K => J (Temperature to Energy) kg => J (Mass to Energy) m => cKayser (Wavelength tp Wavenumber) cKayser => Hz (Wavenumber to frequency) cKayser => J (Wavenumber to Energy)