Convert Candelas per square inch to Candelas per square foot
Convert Candelas per square inch (cd/in²) to Candelas per square foot (cd/ft²) instantly and accurately.
Conversion Formula
cd/ft² = cd/in² × 144
About Candelas per square inch
The candela per square inch (cd/in²) equals 1/0.00064516 cd/m² ≈ 1 550 cd/m². Used in US LED and CRT datasheets when citing luminance of small emitter areas. A high-brightness packaged LED chip in a focussed-beam configuration can reach 1-20 cd/in². 1 cd/in² = 1/(0.0254²) cd/m².
About Candelas per square foot
The candela per square foot (cd/ft²) equals 1/0.09290304 cd/m² ≈ 10.76 cd/m². Used in US lighting engineering; an illuminated office ceiling panel has luminance ~4-8 cd/ft². The ANSI ergonomic limit for computer workstation background sources is ~340 cd/ft². 1 cd/ft² = 1/0.09290304 cd/m².
Quick Reference Table
| Candelas per square inch (cd/in²) | Candelas per square foot (cd/ft²) |
|---|---|
| 1 cd/in² | 144 cd/ft² |
| 2 cd/in² | 288 cd/ft² |
| 5 cd/in² | 720 cd/ft² |
| 10 cd/in² | 1440 cd/ft² |
| 25 cd/in² | 3600 cd/ft² |
| 50 cd/in² | 7200 cd/ft² |
| 100 cd/in² | 14400 cd/ft² |