Convert Lumens per square inch to Lux
Convert Lumens per square inch (lm/in²) to Lux (lx) instantly and accurately.
Conversion Formula
lx = lm/in² × 1550.0031
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 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.
Quick Reference Table
| Lumens per square inch (lm/in²) | Lux (lx) |
|---|---|
| 1 lm/in² | 1550 lx |
| 2 lm/in² | 3100.01 lx |
| 5 lm/in² | 7750.02 lx |
| 10 lm/in² | 15500 lx |
| 25 lm/in² | 38750.1 lx |
| 50 lm/in² | 77500.2 lx |
| 100 lm/in² | 155000 lx |