Illuminance
foot-candles to lux Converter
1 fc = 10.7639 lx. Enter any value and the result updates instantly.
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Accuracy and rounding
Illuminance measures light arriving at a surface. It is different from lumens, which describe luminous flux.
Lux is lumens per square meter; foot-candles are lumens per square foot, using the exact international foot.
Whole lux values are usually enough for room surveys; calibrated lighting work should follow the meter resolution.
How to convert foot-candles to lux
- Type the foot-candles value in the calculator.
- Keep foot-candles selected as the from unit and lux selected as the to unit.
- Use the instant result, or copy it with the copy button.
foot-candles to lux chart
| foot-candles | lux |
|---|---|
| 1 fc | 10.7639 lx |
| 2 fc | 21.5278 lx |
| 5 fc | 53.8196 lx |
| 10 fc | 107.64 lx |
| 25 fc | 269.1 lx |
| 50 fc | 538.2 lx |
| 100 fc | 1,076.39 lx |
Formula
lx = fc x 10.76391041671
Example: 1 fc = 10.7639 lx.
Source
Illuminance factors from NIST light-unit conversion tables, using lux as the shared reference unit.
Common questions
How do I convert foot-candles to lux?
Enter the foot-candles value in the converter, or multiply by the factor shown in the formula. 1 fc = 10.7639 lx.
What should I watch out for?
Lux and foot-candles measure light on a surface, not total lamp output in lumens.
Where does this illuminance conversion come from?
Illuminance factors from NIST light-unit conversion tables, using lux as the shared reference unit. ConverterBase uses stable definitions and fixed conversion factors, not live or rounded market data.