Foot-candles to Nox Converter
Enter the illumination in foot-candles below to convert it to nox.
Convert Foot-candles to Nox
Enter a value in foot-candles (fc) to convert to nox (nx).
Foot-candle to Nox Conversion Table
Table showing various foot-candle measurements converted to nox. Click any preset value or arrow to load it into the converter.
| Foot-candles (fc) | Nox (nx) |
|---|---|
| 1 fc | 10,763.9104 nx |
| 2 fc | 21,527.8208 nx |
| 2.5 fc | 26,909.776 nx |
| 5 fc | 53,819.552 nx |
| 10 fc | 107,639.104 nx |
| 15 fc | 161,458.656 nx |
| 20 fc | 215,278.208 nx |
| 25 fc | 269,097.76 nx |
| 30 fc | 322,917.312 nx |
| 50 fc | 538,195.52 nx |
How to Convert Foot-candles to Nox
To convert foot-candles to nox, multiply the illumination by the following conversion ratio: 10,763.9104 nox/foot-candle.
Since one foot-candle is equal to 10,763.9104 nox, you can use this simple formula to convert:
The illumination in nox is equal to the illumination in foot-candles multiplied by 10,763.9104.
For example, here's how to convert 5 foot-candles to nox using the formula above.
How Many Nox Are in a Foot-candle?
There are 10,763.9104 nox in a foot-candle, which is why we use this value in the formula above.
Our foot-candle to nox calculator automatically converts your illumination measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Foot-candles and nox are both units used to measure illumination. Keep reading to learn more about each unit.
What Is a Foot-candle?
A foot-candle is a unit of illumination equal to 10.7639104 lux (lx), the base unit for illumination. Architectural and photography lighting unit (1 lm/ft² ≈ 10.7639 lux). [1]
The foot-candle is classified as a US customary unit of illumination. Foot-candles can be abbreviated as fc; for example, 1 foot-candle can be written as 1 fc.
When working with foot-candles (fc) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, foot-candles (fc) are widely used across standard illumination applications within US customary workflows, engineering documentation, and technical data sheets.
What Is a Nox?
A nox is a unit of illumination equal to 1/1,000 of a lux (0.001 lx). Dark-adapted illuminance unit equal to 1 millilux (0.001 lx). [2]
The nox is classified as a metric and SI-compatible unit of illumination. Nox can be abbreviated as nx; for example, 1 nox can be written as 1 nx.
When working with nox (nx) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, nox (nx) are widely used across fine-tolerance laboratory, analytical, and micro-scale illumination measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting illumination between foot-candles (fc) and nox (nx), keep full floating-point precision (1 fc = 10,763.9104 nx; 1 nx = 0.000092903 fc) during intermediate calculations and round only the final nox figure to match your instrument tolerance.
More Foot-candle & Nox Conversions
Need to calculate in the opposite direction? Use our nox to foot-candles calculator to switch your starting unit immediately. You can also explore related tools such as converting nox to foot-candles, converting foot-candles to lux, or converting lux to kilolux.
Convert from Foot-candles
Convert to Nox
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Illumination Metrology Standard — Foot-candles (fc) to Nox (nx)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Foot-candle (fc) & Nox (nx)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (fc to nx)