Convert Skots to Nanocandelas per square metre
Convert Skots (sk) to Nanocandelas per square metre (ncd/m²) instantly and accurately.
Conversion Formula
ncd/m² = sk × 318309.8862
About Skots
The skot (sk) equals 10⁻³/π cd/m² ≈ 3.183×10⁻⁴ cd/m², defined as one-thousandth of an apostilb. A legacy photometric unit from early German-language vision science. The dark-adapted human eye threshold is around 3×10⁻⁴ cd/m², close to 1 sk. Now obsolete; replaced by cd/m² in SI photometry. 1 sk = 10⁻³/π cd/m².
About Nanocandelas per square metre
The nanocandela per square metre (ncd/m²) equals 10⁻⁹ cd/m². Represents luminance at the threshold of cooled photomultiplier tubes and avalanche photodiode detectors. The darkest OLED black levels (~10⁻⁴ cd/m²) are still five orders of magnitude brighter; this unit is used in single-photon counting photometry. 1 ncd/m² = 10⁻⁹ cd/m².
Quick Reference Table
| Skots (sk) | Nanocandelas per square metre (ncd/m²) |
|---|---|
| 1 sk | 318310 ncd/m² |
| 2 sk | 636620 ncd/m² |
| 5 sk | 1591550 ncd/m² |
| 10 sk | 3183100 ncd/m² |
| 25 sk | 7957750 ncd/m² |
| 50 sk | 15915500 ncd/m² |
| 100 sk | 31831000 ncd/m² |