Convert Candelas per square metre to Foot-lamberts
Convert Candelas per square metre (cd/m²) to Foot-lamberts (fL) instantly and accurately.
Conversion Formula
fL = cd/m² × 0.291863508
About Candelas per square metre
The candela per square metre (cd/m²), informally called the nit, is the SI coherent unit of luminance. A typical laptop screen is 250-500 cd/m²; an HDR TV reaches 1 000-4 000 cd/m²; a clear blue sky is ~3 000-8 000 cd/m². Luminance is the photometric quantity directly perceived as brightness. 1 cd/m² = 1 nit.
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.
Quick Reference Table
| Candelas per square metre (cd/m²) | Foot-lamberts (fL) |
|---|---|
| 1 cd/m² | 0.291864 fL |
| 2 cd/m² | 0.583727 fL |
| 5 cd/m² | 1.45932 fL |
| 10 cd/m² | 2.91864 fL |
| 25 cd/m² | 7.29659 fL |
| 50 cd/m² | 14.5932 fL |
| 100 cd/m² | 29.1864 fL |