Nox to lux
Type a value in nox to see it in lux 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 nox box.
- Read the result in lux as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
lx = nx × 0.001
Multiply the value in nox by 0.001 to get lux.
Example
To convert 25 nx to lux: 25 × 0.001 = 0.025 lx.
Conversion table
| Nox (nx) | Lux (lx) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1,000 | 1 |
About the units
- Nox
- An old unit for very dim light equal to one millilux, exactly one thousandth of a lux.
- Lux
- The SI unit of illuminance, equal to one lumen spread over one square meter.
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 lux are in one nox?
1 nx = 0.001 lx exactly.
How do I convert nox to lux?
Use lx = nx × 0.001. For example, 25 nx = 0.025 lx.
How many nox are in one lux?
1 lx = 1,000 nx.
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.