Convert Picocandelas to Hefnerkerzen
Convert Picocandelas (pcd) to Hefnerkerzen (HK) instantly and accurately.
Conversion Formula
HK = pcd × 1.086956522e-12
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.
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.
Quick Reference Table
| Picocandelas (pcd) | Hefnerkerzen (HK) |
|---|---|
| 1 pcd | 1.087 × 10-12 HK |
| 2 pcd | 2.174 × 10-12 HK |
| 5 pcd | 5.435 × 10-12 HK |
| 10 pcd | 1.087 × 10-11 HK |
| 25 pcd | 2.717 × 10-11 HK |
| 50 pcd | 5.435 × 10-11 HK |
| 100 pcd | 1.087 × 10-10 HK |