Lux Converter
Convert between lux, foot-candles, and lumens with ease
1Input Values
Illuminance in lux (SI unit)
2Conversion Result
46.45
foot-candles
Formula Used
500 lux × 0.0929 = 46.45 fc
Quick Reference
1 lux
= 0.0929 fc
1 fc
= 10.764 lux
Lumens = Lux × Area (m²)
Total light output equals illuminance times area
Recommended Illuminance Levels
Corridors & Hallways
General circulation areas
Living Room
Ambient residential lighting
General Office
Standard desk work areas
Retail Store
General merchandise display
Detailed Work
Drawing, fine assembly
Precision Tasks
Inspection, color matching
Understanding Illuminance Units
Illuminance measures the amount of light falling on a surface. The two most common units are lux (used internationally) and foot-candles (used primarily in the United States). Understanding how to convert between these units is essential for lighting designers, architects, and anyone working with lighting specifications.
Lux vs Foot-Candles
Lux (lx)
The SI unit of illuminance, measuring lumens per square meter. Used worldwide in lighting standards and specifications. One lux equals one lumen per square meter.
Foot-Candle (fc)
The US customary unit of illuminance, measuring lumens per square foot. Commonly used in North American lighting design. One foot-candle equals approximately 10.764 lux.
Practical Tips
- •Use lux for international projects or when working with ISO/IEC standards
- •Use foot-candles for US projects following IESNA recommendations
- •Remember: lumens measure total light output, while lux and foot-candles measure light at a surface