Convert Foot-lamberts to Microcandelas per square metre
Convert Foot-lamberts (fL) to Microcandelas per square metre (µcd/m²) instantly and accurately.
Conversion Formula
µcd/m² = fL × 3426259.1
About Foot-lamberts
The foot-lambert (fL) equals 1/(π×0.09290304) cd/m² ≈ 3.426 cd/m², the luminance of a perfect diffuse surface emitting 1 lumen per square foot. The SMPTE standard for cinema screen luminance is 14 fL (≈48 cd/m²); home projectors are rated 10-35 fL. Still standard in US cinema and theatre engineering. 1 fL = 1/(π×ft²) cd/m².
About Microcandelas per square metre
The microcandela per square metre (µcd/m²) equals 10⁻⁶ cd/m². Used in precision dark-sky photometry and in measuring the luminance of unlit passive surfaces. OLED deep-black levels are typically 0.0001-0.01 cd/m², about 100-10 000 times larger than this scale. 1 µcd/m² = 10⁻⁶ cd/m².
Quick Reference Table
| Foot-lamberts (fL) | Microcandelas per square metre (µcd/m²) |
|---|---|
| 1 fL | 3426260 µcd/m² |
| 2 fL | 6852520 µcd/m² |
| 5 fL | 17131300 µcd/m² |
| 10 fL | 34262600 µcd/m² |
| 25 fL | 85656500 µcd/m² |
| 50 fL | 171313000 µcd/m² |
| 100 fL | 342626000 µcd/m² |