Conversion factor: 1 foot-candle = 10.764 lux
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lux
This calculator converts illuminance values from foot-candles (fc) to lux (lx), two fundamental units used in lighting design and photometry.
Foot-candles represent illuminance in the Imperial system, while lux is the metric equivalent used internationally.
Conversion Formula
lux = foot-candles × 10.764
The conversion factor 10.764 is derived from the relationship between square feet and square meters.
Foot-candles (fc)
Imperial unit measuring lumens per square foot. Commonly used in North American lighting standards and building codes.
Lux (lx)
Metric unit measuring lumens per square meter. International standard for illuminance measurements in Europe and worldwide.
Example Calculation
Input: 50 foot-candles
Calculation: 50 × 10.764 = 538.2 lux
Result: 538.2 lux
Applications
Essential for architects, lighting engineers, and facility managers when working with international lighting standards, converting between IESNA and CIE recommendations, or adapting lighting designs across different regional requirements.