Photometry
fctonox
Convert foot-candles (fc) to nox (nox).
Factor1 fc = 10763.91 nox
Converter
fc
Accepts numbers or expressions, e.g. 150 + 14.7
Result
nox
Rendered to 6 significant figures.
Formula
Formula
nox = fc × 10763.91
Multiply any value in foot-candles by 10763.91 to obtain the value in nox.
Worked example
Convert 1 fc to nox.
- 01Start with 1 fc.
- 02Multiply by the conversion factor: 1 × 10763.91 = 10763.9 nox.
Result1 fc = 10763.9 nox
Conversion table
| fc | nox |
|---|---|
| 1 | 10764 |
| 2 | 21528 |
| 5 | 53820 |
| 10 | 1.0764e+5 |
| 20 | 2.1528e+5 |
| 50 | 5.3820e+5 |
| 100 | 1.0764e+6 |
| 200 | 2.1528e+6 |
| 500 | 5.3820e+6 |
| 1000 | 1.0764e+7 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from fc to nox?
1 fc equals 10763.91 nox. To convert, multiply the value in foot-candles by 10763.91.
How do I convert 1 fc to nox?
1 fc = 10763.9 nox. For any value, multiply by 10763.91.
How do I convert nox back to fc?
Divide by the same factor — or equivalently, multiply by 9.290304e-5. So 1 nox = 9.2903e-5 fc.
When would I need to convert foot-candle to nox?
Illuminance conversions between fc and nox are used in lighting design, workplace safety assessments, and photographic exposure work. Lux is the SI standard for international codes; foot-candles remain common in US lighting specifications.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).