Convert Stilbs to Candelas per square inch
Convert Stilbs (sb) to Candelas per square inch (cd/in²) instantly and accurately.
Conversion Formula
cd/in² = sb × 6.4516
About Stilbs
The stilb (sb) equals 1 cd/cm² = 10⁴ cd/m². The CGS luminance unit. A candle flame has luminance ~0.5-0.6 sb; a frosted incandescent bulb ~10 sb; a xenon short-arc lamp up to 170 000 sb. Named from the Greek στίλβω (to glitter). Found in pre-1970 photometry texts. 1 sb = 10⁴ 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
| Stilbs (sb) | Candelas per square inch (cd/in²) |
|---|---|
| 1 sb | 6.4516 cd/in² |
| 2 sb | 12.9032 cd/in² |
| 5 sb | 32.258 cd/in² |
| 10 sb | 64.516 cd/in² |
| 25 sb | 161.29 cd/in² |
| 50 sb | 322.58 cd/in² |
| 100 sb | 645.16 cd/in² |