Illuminance Converter
Instantly convert illuminance measurements between metric Lux (lx) and imperial Foot-candles (ft-cd).
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About Illuminance Units
Illuminance is a measure of how much luminous flux is spread over a given area. It tells us how much incident light illuminates a surface, which is crucial for photography, interior design, and plant growth.
Lux (lx)
The SI derived unit of illuminance. It is equal to one lumen per square meter (lm/m²). For context, a typical family living room is lit at around 50 to 100 lux, while direct sunlight can be over 100,000 lux.
Foot-candle (ft-cd)
A non-SI unit of illuminance widely used in the United States in photography, film, television, conservation lighting, and construction. It is defined as the illuminance on a one-square-foot surface from a uniform source of light. One foot-candle is equivalent to approximately 10.764 lux.