Luminance Converter

Convert luminance between candela per square metre, foot-lambert, stilb, and related photometric units.

Convert instantly

Enter a value and choose the units. Your answer updates as you type.

Value

From

Result

0.29186350796 Foot-lambert (fL)

Quick reference

Candela per square metre (cd/m²)1 base units
Foot-lambert (fL)3.4262590996353905 base units
Candela per square foot (cd/ft²)10.763910416709722 base units
Stilb (sb)10000 base units

About the Luminance Converter

Luminance is the light emitted or reflected toward an observer per projected area, so display calibration, road lighting, cinema screens, and material reflectance measurements use it. This page retains the standard SI relationship while keeping customary and legacy units explicit, which is important when a specification crosses disciplines.

Enter a value to see the conversion immediately—for example, 1 foot-lambert equals approximately 3.4262591 cd/m². For a related check, use the Illumination Converter and Luminous Intensity Converter; those tools describe a different but commonly connected quantity.

Frequently asked questions

What does the luminance measure?

Luminance is the light emitted or reflected toward an observer per projected area, so display calibration, road lighting, cinema screens, and material reflectance measurements use it.

What is a useful reference conversion for luminance?

1 foot-lambert equals approximately 3.4262591 cd/m².

Are the factors on this page exact?

SI prefixes and internationally defined units use their standard factors. Legacy and customary factors are retained at their published scientific definitions and may be rounded only for display.

Take this calculation further

Browse the converters calculators collection for more tools in this subject.

For a related calculation, use Luminous Intensity Converter to convert luminous intensity between candela, millicandela, kilocandela, candlepower, and related scales. Alternatively, use Sound Level Converter to convert sound pressure in pascals and dB SPL, or acoustic intensity in W/m² and dB, with explicit references and correct logarithmic formulas.

For the underlying method, read Understanding Sound Decibels: Why the Scale Isn't Linear.