Foot-candles to lux
Type a value in foot-candles to see it in lux straight away, or type in the second box to convert back.
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How to use it
- Type the value in the foot-candles 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 = fc × 10.76391042
Multiply the value in foot-candles by 10.76391042 to get lux.
Example
To convert 25 fc to lux: 25 × 10.76391042 = 269.098 lx.
Conversion table
| Foot-candles (fc) | Lux (lx) |
|---|---|
| 1 | 10.7639 |
| 2 | 21.5278 |
| 3 | 32.2917 |
| 5 | 53.8196 |
| 10 | 107.639 |
| 20 | 215.278 |
| 25 | 269.098 |
| 50 | 538.196 |
| 100 | 1,076.39 |
| 250 | 2,690.98 |
| 500 | 5,381.96 |
| 1,000 | 10,763.9 |
About the units
- Foot-candle
- One lumen per square foot, exactly 10.763910416709722 lux, used in US lighting specifications.
- 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 foot-candle?
1 fc = 10.7639 lx exactly.
How do I convert foot-candles to lux?
Use lx = fc × 10.76391042. For example, 25 fc = 269.098 lx.
How many foot-candles are in one lux?
1 lx = 0.092903 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.