calculand - Light formulas
Unit converter
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Calculate primes
Convert WARP
Volume formulas
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Heat formulas
Light formulas
Exponents, roots
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Circular functions
Elements and materials
Formula collection
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Impressum/Contact
Φᵥ/P
Iᵥ·Ω/P
Iᵥ·Ω·t/E
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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
Luminous efficacy -
ηᵥ = Φᵥ / P
alm - Attolumen
Cd msr - Candela millisteradian
Cd (´)² - Candela square arcminute
Cd (´´)² - Candela square arcsecond
Cd cm²/m² - Candela square centimetre per square metre
Cd (°)² - Candela square degree
Cd in²/ft² - Candela square inch per square foot
Cd sr - Candela steradian
CP sr - Candlepower steradian
carcel sr - Carcel steradian
clm - Centilumen
dalm - Decalumen
dlm - Decilumen
Elm - Exalumen
flm - Femtolumen
Glm - Gigalumen
hlm - Hectolumen
klm - Kilolumen
lm - Lumen
Mlm - Megalumen
µlm - Microlumen
mlm - Millilumen
nlm - Nanolumen
Plm - Petalumen
plm - Picolumen
Tlm - Teralumen
Violle sr - Violle steradian
ylm - Yoctolumen
Ylm - Yottalumen
zlm - Zeptolumen
Zlm - Zettalumen
aW - Attowatt
BTU/h - British thermal unit per hour
BTU/min - British thermal unit per minute
BTU/s, btu/s - British thermal unit per second
cal/h - Calorie per hour
cal/min - Calorie per minute
cal/s - Calorie per second
cW - Centiwatt
ch - Cheval vapeur
daNm/s - Decanewton metre per second
daW - Decawatt
dW - Deciwatt
dyncm/s - Dyne centimetre per second
dynm/s - Dyne metre per second
eV/s - Electronvolt per second
erg/s - Erg per second
EW - Exawatt
fW - Femtowatt
GW - Gigawatt
hW - Hectowatt
hp, bhp - Horsepower (Brake horsepower)
PS, hp(M) - Horsepower (metric)
J/d - Joule per day
J/h - Joule per hour
J/min - Joule per minute
J/s - Joule per second
J/y, J/a - Joule per year
kcal/h - Kilocalorie per hour
kcal/min - Kilocalorie per minute
kcal/s - Kilocalorie per second
kg m²/s³ - Kilogram square metre per second cubed
kpm/s - Kilopond metre per second
kW - Kilowatt
mp - Manpower
MW - Megawatt
mkp/s - Metre kilopond per second
µW - Microwatt
mW - Milliwatt
nW - Nanowatt
Nm/s - Newton metre per second
Ω A² - Ohm ampere squared
Pa m³/s - Pascal cubic metre per second
PW - Petawatt
pW - Picowatt
P(P) - Planck power
p - Poncelet
pm/s - Pond metre per second
lb ft²/s³ - Pound square foot per second cubed
lb in²/s³ - Pound square inch per second cubed
TW - Terawatt
var - Var (Volt Ampere Reactive)
VA - Volt ampere
V²/Ω - Volt squared per ohm
W - Watt
yW - Yoctowatt
YW - Yottawatt
zW - Zeptowatt
ZW - Zettawatt
alm/W - Attolumen per watt
Cd sr s³/kg ft² - Candela steradian second cubed per kilogram square foot
Cd sr s³/kg in² - Candela steradian second cubed per kilogram square inch
Cd sr s³/kg m² - Candela steradian second cubed per kilogram square metre
Cd sr s³/lb ft² - Candela steradian second cubed per pound square foot
Cd sr s³/lb in² - Candela steradian second cubed per pound square inch
Cd sr s/eV - Candela steradian second per electronvolt
Cd sr s/J - Candela steradian second per joule
clm/W - Centilumen per watt
dalm/W - Decalumen per watt
dlm/W - Decilumen per watt
Elm/W - Exalumen per watt
flm/W - Femtolumen per watt
Glm/W - Gigalumen per watt
hlm/W - Hectolumen per watt
klm/W - Kilolumen per watt
lumberg/J - Lumberg per joule
lmh/J - Lumen hour per joule
lm/W - Lumen per watt
lms/eV - Lumen second per electronvolt
lms/erg - Lumen second per erg
lms/J - Lumen second per joule
lms/kWh - Lumen second per kilowatt hour
lms/Wh - Lumen second per watt hour
lumerg/J - Lumerg per joule
Mlm/W - Megalumen per watt
µlm/W - Microlumen per watt
mlm/W - Millilumen per watt
nlm/W - Nanolumen per watt
Plm/W - Petalumen per watt
plm/W - Picolumen per watt
talbot/J - Talbot per joule
Tlm/W - Teralumen per watt
ylm/W - Yoctolumen per watt
Ylm/W - Yottalumen per watt
zlm/W - Zeptolumen per watt
Zlm/W - Zettalumen per watt
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