Conversion category

Illumination converters

Illuminance measures luminous flux received per unit area.

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candela steradian/sq. meter
centimeter-candle (cm*c)
flame
foot-candle (ft*c, fc)
lumen/square centimeter
lumen/square foot (lm/ft^2)
lumen/square meter (lm/m^2)
lux (lx)
meter-candle (m*c)
nox
phot (ph)
watt/sq. cm (at 555 nm)

Illumination converters

Illuminance measures luminous flux received per unit area. This CalculatorHQ catalog contains 12 canonical units and 132 directional conversion routes in this category. Most illumination conversions are linear. CalculatorHQ converts each unit through lux and derives the target value from the two canonical scale factors. Unit names that include regional, historical, dry, liquid, survey, or standard-condition qualifiers are treated as distinct definitions.