Convert Lumens per square yard to Lumens per square inch
Convert Lumens per square yard (lm/yd²) to Lumens per square inch (lm/in²) instantly and accurately.
Conversion Formula
lm/in² = lm/yd² × 0.0007716049383
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 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.
Quick Reference Table
| Lumens per square yard (lm/yd²) | Lumens per square inch (lm/in²) |
|---|---|
| 1 lm/yd² | 0.000771605 lm/in² |
| 2 lm/yd² | 0.00154321 lm/in² |
| 5 lm/yd² | 0.00385802 lm/in² |
| 10 lm/yd² | 0.00771605 lm/in² |
| 25 lm/yd² | 0.0192901 lm/in² |
| 50 lm/yd² | 0.0385802 lm/in² |
| 100 lm/yd² | 0.0771605 lm/in² |