Convert Hefnerkerzen to Picocandelas
Convert Hefnerkerzen (HK) to Picocandelas (pcd) instantly and accurately.
Conversion Formula
pcd = HK × 920000000000
About Hefnerkerzen
The Hefnerkerze (HK) equals 0.920 cd (DIN 5031 conventional value). The German photometric standard unit from 1884 to 1942, defined by the luminous intensity of a Hefner lamp burning amyl acetate. Used as the official German standard before the adoption of the international candela. 1 HK = 0.920 cd.
About Picocandelas
The picocandela (pcd) equals 10⁻¹² cd. A theoretical subunit used only in precision photometric standard traceability and single-photon detector characterisation. The faintest LED indicator in standby mode (~10 µcd) is one million times brighter. Appears in calibration chain documentation. 1 pcd = 10⁻¹² cd.
Quick Reference Table
| Hefnerkerzen (HK) | Picocandelas (pcd) |
|---|---|
| 1 HK | 9.2 × 1011 pcd |
| 2 HK | 1.84 × 1012 pcd |
| 5 HK | 4.6 × 1012 pcd |
| 10 HK | 9.2 × 1012 pcd |
| 25 HK | 2.3 × 1013 pcd |
| 50 HK | 4.6 × 1013 pcd |
| 100 HK | 9.2 × 1013 pcd |