Convert Lumens per square yard to Foot-candles
Convert Lumens per square yard (lm/yd²) to Foot-candles (fc) instantly and accurately.
Conversion Formula
fc = lm/yd² × 0.1111111111
About Lumens per square yard
The lumen per square yard (lm/yd²) equals 1/0.83612736 lx ≈ 1.196 lx. Used occasionally in UK outdoor area lighting specifications alongside foot-candles. A 3 lx minimum car-park standard equals ~2.5 lm/yd²; a 100 lx sports-field requirement ~84 lm/yd². 1 lm/yd² = 1/0.83612736 lx.
About Foot-candles
The foot-candle (fc) equals 1 lm/ft² ≈ 10.764 lx. Standard in North American lighting design: IESNA recommends 30-50 fc for general offices, 50-100 fc for retail displays, 12-16 fc for cinema screens. Still the dominant unit in the US, Canada and some other countries. 1 fc = 1/0.09290304 lx.
Quick Reference Table
| Lumens per square yard (lm/yd²) | Foot-candles (fc) |
|---|---|
| 1 lm/yd² | 0.111111 fc |
| 2 lm/yd² | 0.222222 fc |
| 5 lm/yd² | 0.555556 fc |
| 10 lm/yd² | 1.11111 fc |
| 25 lm/yd² | 2.77778 fc |
| 50 lm/yd² | 5.55556 fc |
| 100 lm/yd² | 11.1111 fc |