Convert Foot-Candle to Lux
Live bidirectional calculator for Foot-Candles (fc) and Lux (lx) with verified formula and conversion charts.
Illuminance5 units
How the Calculation Works (Linear Scaling)
Since 1 Foot-Candle = 10.76391 Lux, multiply the value in Foot-Candles by 10.76391.
Foot-Candle to Lux Conversion Table
Precomputed values for quick reference and printing.
| Foot-Candle | Lux |
|---|---|
| 1 fc | 10.7639 lx |
| 2 fc | 21.5278 lx |
| 3 fc | 32.2917 lx |
| 4 fc | 43.0556 lx |
| 5 fc | 53.8196 lx |
| 6 fc | 64.5835 lx |
| 7 fc | 75.3474 lx |
| 8 fc | 86.1113 lx |
| 9 fc | 96.8752 lx |
| 10 fc | 107.6391 lx |
| 15 fc | 161.4587 lx |
| 20 fc | 215.2782 lx |
| 25 fc | 269.0978 lx |
| 30 fc | 322.9173 lx |
| 40 fc | 430.5564 lx |
| 50 fc | 538.1955 lx |
| 75 fc | 807.2933 lx |
| 100 fc | 1076.391 lx |
| Lux | Foot-Candle |
|---|---|
| 1 lx | 0.0929 fc |
| 2 lx | 0.1858 fc |
| 3 lx | 0.2787 fc |
| 4 lx | 0.3716 fc |
| 5 lx | 0.4645 fc |
| 6 lx | 0.5574 fc |
| 7 lx | 0.6503 fc |
| 8 lx | 0.7432 fc |
| 9 lx | 0.8361 fc |
| 10 lx | 0.929 fc |
| 15 lx | 1.3935 fc |
| 20 lx | 1.8581 fc |
| 25 lx | 2.3226 fc |
| 30 lx | 2.7871 fc |
| 40 lx | 3.7161 fc |
| 50 lx | 4.6452 fc |
| 75 lx | 6.9677 fc |
| 100 lx | 9.2903 fc |
π Standard Benchmark Reference Values
Exact US customary illumination standard (1 lumen per square foot = 1 / 0.09290304 lx).
Exact RatioAbout Foot-Candle (fc)
A non-SI unit of illuminance equal to 1 lumen per square foot. Equal to approximately 10.7639104167 lux based on the international foot (0.3048 m).
History: Traditional imperial measure standardizing the illumination produced on a surface one foot away from a uniform standard candle source.
Common Uses: US architectural building codes, IESNA lighting design standards, American film and television production sets.
About Lux (lx)
The SI coherent derived unit of illuminance and luminous emittance, equal to 1 lumen per square meter (1 lx = 1 lm/mΒ²).
History: Introduced by French physicist RenΓ© Benoist in 1889 and adopted as the international standard unit of illumination by the CIPM in 1948.
Common Uses: Architectural lighting design, workplace lighting standards (OSHA/CIBSE), photography light metering, environmental daylight studies.
β Frequently Asked Questions
How many Lux are in 1 Foot-Candle?
There are exactly 10.76391 Lux in 1 Foot-Candle (1 fc = 10.76391 lx).
What is the formula to convert Foot-Candle to Lux?
The formula is: Lux = Foot-Candle Γ 10.76391. Since 1 Foot-Candle = 10.76391 Lux, multiply the value in Foot-Candles by 10.76391.
How do I convert 1 fc to lx manually?
To convert 1 fc to lx: apply the formula Lux = Foot-Candle Γ 10.76391. Substituting gives: 1 Γ 10.76391 = 10.7639 lx.