Illumination Converter
Lux (lx), Foot-candle (fc)
From method
Value
To method
Result
Lux (lx) → Foot-candle (fc)
1 lx = 0.092903 fc
About Illumination Conversions
Convert between lux and foot-candle to measure light intensity. This is helpful for photographers, lighting designers, and facilities managers to ensure correct illumination levels.
Quick reference
- 1 fc ≈ 10.7639 lux
- Basics: Illumination measures how much light falls on a surface. Common units are lux (lx) per square metre and foot-candle (fc) per square foot. Converting between them helps maintain correct lighting levels across regions.
- Conversion & examples: 1 fc ≈ 10.7639 lux. Typical levels: corridor ~50 lx, office desk ~300–500 lx, precision manufacturing often thousands of lx. Photographers convert units to match exposure meters and gear.
- Practical uses: Lighting designers create plans to meet codes and comfort needs; homeowners estimate expected lux from bulb lumens and room area; facility managers monitor illuminance for safety and productivity.
- Measurement notes: Lux depends on lumens, fixture optics and distance. For estimates divide lumens by area and adjust for fixture efficiency; use a calibrated light-meter for precise measurements.
- Applications: Use this converter for photography lighting setups, architectural lighting design, workplace safety compliance, and horticultural grow light planning.
- Examples: A desk lamp rated at 800 lumens over a 0.5 m² area provides approximately 1600 lx (800 lm / 0.5 m²). Converting to foot-candles: 1600 lx ÷ 10.7639 ≈ 148.6 fc.
- Standards: Recommended illumination levels vary by activity: offices ~300–500 lx, retail ~500–1000 lx, surgical suites less than 10,000 lx. Use appropriate units for local regulations and guidelines.
- History: The foot-candle originated in the imperial system, while lux is part of the metric system. As global standards converged, lux became more common in scientific and engineering contexts.
- Context & tips: Photometry developed with electric lighting and photography. When documenting lighting, state whether values are measured or calculated and keep units consistent across plans to avoid miscommunication.
- Feedback: If you have suggestions for additional features or improvements, please reach out via our feedback page.