Convert Foot-lamberts to Meganits
Convert Foot-lamberts (fL) to Meganits (Mcd/m²) instantly and accurately.
Conversion Formula
Mcd/m² = fL × 3.426259100e-6
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 Meganits
The meganit (Mcd/m²) equals 10⁶ cd/m². The scale for extreme light sources: outdoor LED video walls at peak brightness reach 3-10 Mcd/m²; laser exit apertures are typically 10-10 000 Mcd/m²; the solar disc at zenith has luminance ≈1 600 Mcd/m² (1.6×10⁹ cd/m²). Used in laser safety and high-power illumination. 1 Mcd/m² = 10⁶ cd/m².
Quick Reference Table
| Foot-lamberts (fL) | Meganits (Mcd/m²) |
|---|---|
| 1 fL | 3.426 × 10-6 Mcd/m² |
| 2 fL | 6.853 × 10-6 Mcd/m² |
| 5 fL | 1.713 × 10-5 Mcd/m² |
| 10 fL | 3.426 × 10-5 Mcd/m² |
| 25 fL | 8.566 × 10-5 Mcd/m² |
| 50 fL | 0.000171313 Mcd/m² |
| 100 fL | 0.000342626 Mcd/m² |