Convert Lux to Foot-candles (lx to fc)
1 lux (lx) = 0.09290304 foot-candles (fc). 1 fc = 10.76391042 lx. Example: 500 lx = 500 × 0.09290304 = 46.45152 fc.
Also searched as lux to foot candles, lx to fc, lux to footcandles and lux to fc conversion.
1 lx = 0.09290304 fc
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk lux to foot-candle converter to paste a column from Excel.
How to Convert Lux to Foot-candle
- 1 lx = 0.09290304 fc
- 1 fc = 10.76391042 lx
- Example: convert 500 lx to fc: 500 lx = 500 × 0.09290304 fc = 46.45152 fc
Formula
fc = lx × 0.09290304
or fc = lx ÷ 10.76391041671
Derivation from SI units:
- 1 lx = 1 lm/m².
- 1 fc = 1 lm/ft² = 1/0.09290304 lx ≈ 10.7639 lx.
Both units are defined exactly, so the factor is exact. Lux definition: lux; Foot-candle definition: foot-candle.
Worked examples
- An office lit to 500 lx has 46.45152 fc.
500 lx × 0.09290304 = 46.45152 fc - 1000 lx is 92.90304 fc.
1000 lx × 0.09290304 = 92.90304 fc
Lux to Foot-candle conversion table
| Lux (lx) | Foot-candles (fc) |
|---|---|
| 1 lx | 0.09290304 fc |
| 10 lx | 0.9290304 fc |
| 50 lx | 4.645152 fc |
| 100 lx | 9.290304 fc |
| 300 lx | 27.870912 fc |
| 500 lx | 46.45152 fc |
| 750 lx | 69.67728 fc |
| 1000 lx | 92.90304 fc |
| 10000 lx | 929.0304 fc |
| 100000 lx | 9290.304 fc |
Where it's used
Light levels in lux from European standards, meters and datasheets are converted to foot-candles for US lighting design and IES guides. Divide by 10.7639.
Lux to other illuminance units
| Conversion | 1 lx equals |
|---|---|
| lux to foot-candle | 0.09290304 fc |
| lux to kilolux | 0.001 klx |
| lux to phot | 0.0001 ph |
| lux to millilux | 1000 mlx |
Frequently asked questions
How many foot-candles is 1 lux?
1 lx = 0.09290304 fc, because a foot-candle is one lumen per square foot and a square foot is 0.0929 m².
How much light do indoor plants need?
Low-light plants manage with 50–250 fc (500–2700 lx); fruiting plants need 1000 fc (10,800 lx) or more.
How many foot-candles are in 1 lux?
1 lx = 0.09290304 fc.
How do I convert lux to foot-candles?
Multiply the value in lx by 0.09290304, or divide it by 10.76391042. For example, 500 lx × 0.09290304 = 46.45152 fc.
Is the lx to fc 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
- 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).
- 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".
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 Lux to Foot-candles (lx to fc). Retrieved October 25, 2026, from https://scientificconverters.com/illuminance/lux-to-foot-candles/
IEEE
Scientific Converters, "Convert Lux to Foot-candles (lx to fc)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/illuminance/lux-to-foot-candles/