Lux to foot-candles
Type a value in lux to see it in foot-candles straight away, or type in the second box to convert back.
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How to use it
- Type the value in the lux box.
- Read the result in foot-candles as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
fc = lx × 0.09290304
Multiply the value in lux by 0.09290304 to get foot-candles.
Example
To convert 25 lx to foot-candles: 25 × 0.09290304 = 2.32258 fc.
Conversion table
| Lux (lx) | Foot-candles (fc) |
|---|---|
| 1 | 0.092903 |
| 2 | 0.185806 |
| 3 | 0.278709 |
| 5 | 0.464515 |
| 10 | 0.92903 |
| 20 | 1.85806 |
| 25 | 2.32258 |
| 50 | 4.64515 |
| 100 | 9.2903 |
| 250 | 23.2258 |
| 500 | 46.4515 |
| 1,000 | 92.903 |
About the units
- Lux
- The SI unit of illuminance, equal to one lumen spread over one square meter.
- Foot-candle
- One lumen per square foot, exactly 10.763910416709722 lux, used in US lighting specifications.
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 foot-candles are in one lux?
1 lx = 0.092903 fc exactly.
How do I convert lux to foot-candles?
Use fc = lx × 0.09290304. For example, 25 lx = 2.32258 fc.
How many lux are in one foot-candle?
1 fc = 10.7639 lx.
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.