Convert Apostilbs to Kilocandelas per square metre
Convert Apostilbs (asb) to Kilocandelas per square metre (kcd/m²) instantly and accurately.
Conversion Formula
kcd/m² = asb × 0.0003183098862
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 Kilocandelas per square metre
The kilocandela per square metre (kcd/m²) equals 1 000 cd/m². The scale for HDR displays and high-brightness monitors: VESA DisplayHDR 1000 requires 1 kcd/m² peak; professional HDR mastering monitors reach 1-4 kcd/m²; an overcast sky measures ~3-8 kcd/m²; a fluorescent tube ~7 kcd/m². 1 kcd/m² = 10³ cd/m².
Quick Reference Table
| Apostilbs (asb) | Kilocandelas per square metre (kcd/m²) |
|---|---|
| 1 asb | 0.00031831 kcd/m² |
| 2 asb | 0.00063662 kcd/m² |
| 5 asb | 0.00159155 kcd/m² |
| 10 asb | 0.0031831 kcd/m² |
| 25 asb | 0.00795775 kcd/m² |
| 50 asb | 0.0159155 kcd/m² |
| 100 asb | 0.031831 kcd/m² |