Foot-candles to nox
Type a value in foot-candles to see it in nox straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the foot-candles box.
- Read the result in nox as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
nx = fc × 10,763.91042
Multiply the value in foot-candles by 10,763.91042 to get nox.
Example
To convert 25 fc to nox: 25 × 10,763.91042 = 269,098 nx.
Conversion table
| Foot-candles (fc) | Nox (nx) |
|---|---|
| 1 | 10,763.9 |
| 2 | 21,527.8 |
| 3 | 32,291.7 |
| 5 | 53,819.6 |
| 10 | 107,639 |
| 20 | 215,278 |
| 25 | 269,098 |
| 50 | 538,196 |
| 100 | 1,076,390 |
| 250 | 2,690,980 |
| 500 | 5,381,960 |
| 1,000 | 10,763,900 |
About the units
- Foot-candle
- One lumen per square foot, exactly 10.763910416709722 lux, used in US lighting specifications.
- Nox
- An old unit for very dim light equal to one millilux, exactly one thousandth of a lux.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many nox are in one foot-candle?
1 fc = 10,763.9 nx exactly.
How do I convert foot-candles to nox?
Use nx = fc × 10,763.91042. For example, 25 fc = 269,098 nx.
How many foot-candles are in one nox?
1 nx = 0.000092903 fc.
What is the difference between lux and lumens?
Lumens are the total light a lamp emits, while lux is how much of it lands on each square meter. A 1000 lumen lamp spread over 10 square meters gives 100 lux.
Why is a foot-candle about 10.764 lux?
A square foot is exactly 0.09290304 square meters, so one lumen per square foot equals 1 / 0.09290304 lumens per square meter.