Convert Lux to Lumens per square inch
Convert Lux (lx) to Lumens per square inch (lm/in²) instantly and accurately.
Conversion Formula
lm/in² = lx × 0.00064516
About Lux
The lux (lx) is the SI coherent unit of illuminance, equal to 1 lm/m². Civil twilight outdoors: ~10 lx; dimly lit corridor: ~50 lx; typical office (EN 12464): 300-500 lx; operating theatre: ~1 000 lx. The most widely used illuminance unit in lighting standards worldwide. 1 lx = 1 lm/m².
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
| Lux (lx) | Lumens per square inch (lm/in²) |
|---|---|
| 1 lx | 0.00064516 lm/in² |
| 2 lx | 0.00129032 lm/in² |
| 5 lx | 0.0032258 lm/in² |
| 10 lx | 0.0064516 lm/in² |
| 25 lx | 0.016129 lm/in² |
| 50 lx | 0.032258 lm/in² |
| 100 lx | 0.064516 lm/in² |