Convert Lumen per Square Inch to Lux
Enter the number of lumens per square inch that you want to convert to lux.
How to Convert Lumens per Square Inch to Lux
The lumen per square inch and lux are both units of illuminance. 1 lumen per square inch equals 1550.0031 lux. This means to convert lumens per square inch to lux, you multiply by 1550.0031.
Formula
Step-by-Step Example
Convert 5 lm/in² to lux:
We need to convert lumens per square inch to lux
Since 1 lm/in² = 1550.0031 lx, multiply by 1550.0031
5 × 1550.0031 = 7750.0155
5 lm/in² = 7750.0155 lx
Lumen per Square Inch to Lux Conversion Table
Quick reference table for common lumen per square inch to lux conversions. Click any value for detailed calculation.
| Lumens per Square Inch (lm/in²) | Lux (lx) |
|---|---|
| 0.1 lm/in² | 155.00031 lx |
| 0.5 lm/in² | 775.00155 lx |
| 1 lm/in² | 1550.0031 lx |
| 2 lm/in² | 3100.0062 lx |
| 5 lm/in² | 7750.0155 lx |
| 10 lm/in² | 15500.031 lx |
| 25 lm/in² | 38750.0775 lx |
| 50 lm/in² | 77500.155 lx |
| 100 lm/in² | 155000.31 lx |
About These Units
Lumen per Square Inch (lm/in²)
Lumens per square inch (lm/in²) equals 1,550 lux or 144 foot-candles. Used for high-intensity illumination of small areas: display lighting, inspection systems, and microscopy. One lm/in² = 144 lm/ft². Rarely used; lux or foot-candles preferred.
Lux (lx)
The lux (lx) is the SI unit of illuminance, measuring luminous flux per area (lumens per square meter). Typical values: moonlight 0.1 lx, office 300-500 lx, overcast day 1,000 lx, operating room 10,000 lx, direct sunlight 100,000 lx. Used in lighting design, photography, and workplace safety standards.
Frequently Asked Questions
How do I convert lumens per square inch to lux?
To convert lumens per square inch to lux, multiply the value by 1550.0031. For example, 10 lm/in² = 15500.031 lx.
How many lux are in 1 lumen per square inch?
1 lumen per square inch equals 1550.0031 lux.
What is the formula for lumens per square inch to lux?
The formula is: lx = lm/in² × 1550.0031.