calculand - Illuminance
Unit converter
Quantity converter
Numeral systems
Calculate primes
Convert WARP
Volume formulas
Area formulas
Length formulas
Energy formulas
Force formulas
Pressure formulas
Power formulas
Velocity formulas
Heat formulas
Light formulas
Exponents, roots
Logarithm
Circular functions
Elements and materials
Formula collection
Unit list
Quantity list
Numeral systems list
Impressum/Contact
Φᵥ/A
Iᵥ/r²·cos(ε)
<
>
Color temperature
Color temperature shift
Exposure
Exposure index
Exposure time
Exposure value
Film speed
Illuminance
Luminance
Luminosity
Luminous efficacy
Luminous energy
Luminous flux
Luminous intensity
Refractive index
f-Number
Illuminance -
Eᵥ = Iᵥ / r² · cos(ε)
aCd - Attocandela
BLE - Berlin light unit (Berliner Lichteinheit)
Cd - Candela
CP - Candlepower
carcel - Carcel
cCd - Centicandela
DVWGK - DVWG-candle (Deutscher Verein der Gas- und Wasserfachmänner)
daCd - Decacandela
dCd - Decicandela
bd - Decimal candle, Bougie décimale
ECd - Exacandela
fCd - Femtocandela
GCd - Gigacandela
hCd - Hectocandela
HK - Hefner candle (Hefner-Kerze)
IK, bi - International candle (Bougie internationale)
kCd - Kilocandela
lm/msr - Lumen per millisteradian
lm/(4πsr) - Lumen per sphere
lm/(´)² - Lumen per square arcminute
lm/(´´)² - Lumen per square arcsecond
lm/(°)² - Lumen per square degree
lm/sr - Lumen per steradian
MCd - Megacandela
µCd - Microcandela
mCd - Millicandela
nCd - Nanocandela
NK - New candle (Neue Kerze)
PCd - Petacandela
photon - Photon
pCd - Picocandela
TCd - Teracandela
td - Troland
Violle - Violle
yCd - Yoctocandela
YCd - Yottacandela
zCd - Zeptocandela
ZCd - Zettacandela
r α tauri - Aldebaran radius
r α cen A - Alpha Centauri A radius
r α cen B - Alpha Centauri B radius
arshin - Arshin (арши́н)
AU, UA - Astronomical unit
am - Attometre
M - Basic module
r α ori - Betelgeuse radius
aₒ - Bohr radius
bu - Bu (分, japan.)
bu - Bu (步, chin.)
cbl. - Cable
cal. - Calibre
cm - Centimetre
r ⚳ - Ceres radius
ch. - Chain
CH, Fr. - Charrière (French)
chi - Chi (市尺)
cho - Chō (町)
cubitus - Cubitus, Roman cubit
cun - Cun (市寸)
dam - Decametre
dm - Decimetre
gradus - Degreeus, Roman step
digitus - Digitus, Roman finger
diuim - Diuim (дюйм)
r ⊕, r ♁ - Earth radius
rₑ - Electron radius
Em - Exametre
ftm - Fathom (nautical)
fm - Femtometre (Fermi)
fen - Fen (市分)
ft - Foot
fur - Furlong
fut - Fut (фут)
Gly - Gigalightyear
Gm - Gigametre
Gpc - Gigaparsec
hank cotton - Hank cotton
hao - Hao (毫)
hm - Hectometre
himetric - Himetric
hu - Hu (忽)
in - Inch
r ♃ - Jupiter radius
jo - Jō (丈)
ken - Ken (間)
kly - Kilolightyear
km - Kilometre
kpc - Kiloparsec
lea cotton - Lea cotton
lea hemp - Lea hemp
lea., l. - League
li, 10 hao - Li (市厘)
li - Li (市里, 15 yin)
Ld - Lightday
Lh - Lighthour
Lm - Lightminute
Ls - Lightsecond
ly - Lightyear
ln. - Line
liniya - Liniya (линия)
li. - Link
r ♂ - Mars radius
Mly - Megalightyear
Mm - Megametre
Mpc - Megaparsec
r ☿ - Mercury radius
m - Metre
3 M - Metric foot (basic module)
¼ M - Metric inch (basic module)
mickey - Mickey
µm - Micrometre (Micron)
mi - Mile
milia - Milia (ми́ля)
mil, thou - Milli-inch (Millesimus, Thousands of an inch)
milliarium - Milliarium, Roman mile
mm - Millimetre
r ☾ - Moon radius
mam - Myriametre
mo - Mō (毫)
nm - Nanometre
nm, sm - Nautical mile (Seamile)
r ♆ - Neptune radius
palmus - Palmus, Roman palm
pc - Parsec (Parallax second)
passus - Passus, Roman double step
pes - Pes, Roman foot
Pm - Petametre
piad - Piad (пядь)
pc. - Pica
pm - Picometre
l(P) - Planck length
r ♇ - Pluto radius
p - Point
ri - Ri (里)
rin - Rin (厘)
rd. - Rod (Perch)
sashen - Sashen (сажень)
r ♄ - Saturn radius
l(S) - Schrödinger length
sh. - Shackle
shaku - Shaku (尺)
si - Si (丝)
SU - Siegbahn unit
skein cotton - Skein cotton
r ☉ - Solar radius
spindle scotch - Spindle Scotch
spindle cotton - Spindle cotton
spindle hemp - Spindle hemp
stadium - Stadium, Roman stadium
p.p. - Stitch
l(St) - Stoney length
stopa - Stopa (стопа)
strehn cotton - Strehn cotton
sun - Sun (寸)
tchetvert - Tchetvert (четверть)
Tly - Teralightyear
Tm - Terametre
Tpc - Teraparsec
thread cotton - Thread cotton
thread hemp - Thread hemp
totchka - Totchka (то́чка)
twip - Twip
r ⛢ - Uranus radius
r ♀ - Venus radius
vershok - Vershok (вершок)
verst - Verst (верста́)
XU - X-unit
yd - Yard
yin - Yin (引)
ym - Yoctometre
Ym - Yottametre
zm - Zeptometre
Zm - Zettametre
zhang - Zhang (市丈)
Å - Ångstrøm
mil, A‰ - Angular mil
´ - Arcminute
´´ - Arcsecond
arad - Attoradian
ᶜ - Centesimal arcminute
ᶜᶜ - Centesimal arcsecond
cgon - Centigon
cm/m - Centimetre per metre
crad - Centiradian
dm/m - Decimetre per metre
drad - Deciradian
° - Degree
frad - Femtoradian
ft/ft - Foot per foot
ft/in - Foot per inch
gon - Gon (Grade)
in/ft - Inch per foot
in/in - Inch per inch
m/cm - Metre per centimetre
m/dm - Metre per decimetre
m/m - Metre per metre
m/mm - Metre per millimetre
µrad - Microradian
mgon - Milligon
mm/m - Millimetre per metre
mrad - Milliradian
nrad - Nanoradian
prad - Picoradian
¯ - Point
rad - Radian
´´´ - Tertia
r - Turn (Rotation)
yrad - Yoctoradian
zrad - Zeptoradian
alx - Attolux
Cd sr/ft², Cd sr/sq. ft. - Candela steradian per square foot
Cd sr/in², Cd sr/sq. in. - Candela steradian per square inch
Cd sr/m² - Candela steradian per square metre
clx - Centilux
dalx - Decalux
dlx - Decilux
Elx - Exalux
flx - Femtolux
fc, ftc - Footcandle
Glx - Gigalux
hlx - Hectolux
klx - Kilolux
lm/cm² - Lumen per square centimetre
lm/dm² - Lumen per square decimetre
lm/ft² - Lumen per square foot
lm/in² - Lumen per square inch
lm/m² - Lumen per square metre
lm/mm² - Lumen per square millimetre
lx - Lux
Mlx - Megalux
µlx - Microlux
mlx - Millilux
nlx - Nanolux
nx - Nox
Plx - Petalux
ph - Phot
plx - Picolux
Tlx - Teralux
ylx - Yoctolux
Ylx - Yottalux
zlx - Zeptolux
Zlx - Zettalux
/
²
· cos(
) =
© 2010 - 2025 Norbert Schneider
