Convert Foot-candles to Lux (fc to lx)
1 foot-candle (fc) = 10.76391042 lux (lx). 1 lx = 0.09290304 fc. Example: 50 fc = 50 × 10.76391042 = 538.1955208 lx.
Also searched as foot candles to lux, fc to lux, footcandles to lux and fc to lx.
1 fc = 10.76391042 lx
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk foot-candle to lux converter to paste a column from Excel.
How to Convert Foot-candle to Lux
- 1 fc = 10.76391042 lx
- 1 lx = 0.09290304 fc
- Example: convert 50 fc to lx: 50 fc = 50 × 10.76391042 lx = 538.1955208 lx
Formula
lx = fc × 10.76391041671
Derivation from SI units:
- 1 fc = 1 lm/ft² = 1/0.09290304 lx ≈ 10.7639 lx.
- 1 lx = 1 lm/m².
Both units are defined exactly, so the factor is exact. Foot-candle definition: foot-candle; Lux definition: lux.
Worked examples
- An IES office level of 50 fc is 538.1955208 lx.
50 fc × 10.76391042 = 538.1955208 lx - 1 fc is 10.76391042 lx.
1 fc × 10.76391042 = 10.76391042 lx
Foot-candle to Lux conversion table
| Foot-candles (fc) | Lux (lx) |
|---|---|
| 1 fc | 10.76391042 lx |
| 5 fc | 53.81955208 lx |
| 10 fc | 107.6391042 lx |
| 20 fc | 215.2782083 lx |
| 30 fc | 322.9173125 lx |
| 50 fc | 538.1955208 lx |
| 75 fc | 807.2932813 lx |
| 100 fc | 1076.391042 lx |
| 500 fc | 5381.955208 lx |
| 1000 fc | 10763.91042 lx |
Where it's used
Illuminance in foot-candles from US lighting plans and light meters is converted to lux for EN 12464 and international standards. Multiply by 10.7639.
Foot-candle to other illuminance units
| Conversion | 1 fc equals |
|---|---|
| foot-candle to lux | 10.76391042 lx |
| foot-candle to kilolux | 0.01076391042 klx |
| foot-candle to phot | 0.001076391042 ph |
| foot-candle to millilux | 10763.91042 mlx |
Frequently asked questions
How do I convert foot-candles to lux?
Multiply by 10.7639 (exactly 1/0.09290304): 50 fc = 538.1955208 lx.
How many lux are in 1 foot-candle?
1 fc = 10.76391042 lx.
Is the fc to lx conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "footcandle".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (becquerel, gray, sievert, lux) and Table 2 (candela).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Foot-candles to Lux (fc to lx). Retrieved October 25, 2026, from https://scientificconverters.com/illuminance/foot-candles-to-lux/
IEEE
Scientific Converters, "Convert Foot-candles to Lux (fc to lx)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/illuminance/foot-candles-to-lux/