Convert Apostilbs to Meganits
Convert Apostilbs (asb) to Meganits (Mcd/m²) instantly and accurately.
Conversion Formula
Mcd/m² = asb × 3.183098862e-7
About Apostilbs
The apostilb (asb) equals 1/π cd/m² ≈ 0.3183 cd/m², defined as the luminance of a perfectly diffuse Lambertian surface with an exitance of 1 lm/m². Introduced by the CIE in 1940 and used in European photometry standards and retinal illuminance calculations. 1 asb = 1/π cd/m² ≈ 0.3183 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
| Apostilbs (asb) | Meganits (Mcd/m²) |
|---|---|
| 1 asb | 3.183 × 10-7 Mcd/m² |
| 2 asb | 6.366 × 10-7 Mcd/m² |
| 5 asb | 1.592 × 10-6 Mcd/m² |
| 10 asb | 3.183 × 10-6 Mcd/m² |
| 25 asb | 7.958 × 10-6 Mcd/m² |
| 50 asb | 1.592 × 10-5 Mcd/m² |
| 100 asb | 3.183 × 10-5 Mcd/m² |