Convert Candelas per square foot to Candelas per square inch
Convert Candelas per square foot (cd/ft²) to Candelas per square inch (cd/in²) instantly and accurately.
Conversion Formula
cd/in² = cd/ft² × 0.006944444444
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.
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.
Quick Reference Table
| Candelas per square foot (cd/ft²) | Candelas per square inch (cd/in²) |
|---|---|
| 1 cd/ft² | 0.00694444 cd/in² |
| 2 cd/ft² | 0.0138889 cd/in² |
| 5 cd/ft² | 0.0347222 cd/in² |
| 10 cd/ft² | 0.0694444 cd/in² |
| 25 cd/ft² | 0.173611 cd/in² |
| 50 cd/ft² | 0.347222 cd/in² |
| 100 cd/ft² | 0.694444 cd/in² |