Convert Lumens per square inch to Lumens per square yard
Convert Lumens per square inch (lm/in²) to Lumens per square yard (lm/yd²) instantly and accurately.
Conversion Formula
lm/yd² = lm/in² × 1296
About Lumens per square inch
The lumen per square inch (lm/in²) equals 1/0.00064516 lx ≈ 1 550 lx. Used in US optics and LED backlight datasheets when specifying output over small aperture areas. Rare in general lighting but found in US optical engineering catalogs and LCD backlight specifications. 1 lm/in² = 1/0.00064516 lx.
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.
Quick Reference Table
| Lumens per square inch (lm/in²) | Lumens per square yard (lm/yd²) |
|---|---|
| 1 lm/in² | 1296 lm/yd² |
| 2 lm/in² | 2592 lm/yd² |
| 5 lm/in² | 6480 lm/yd² |
| 10 lm/in² | 12960 lm/yd² |
| 25 lm/in² | 32400 lm/yd² |
| 50 lm/in² | 64800 lm/yd² |
| 100 lm/in² | 129600 lm/yd² |