Lux [lx] to Foot-candle [ft-cd] Converter
Quick Reference
1 Lux (lx) = 0.0929030436 Foot-candle (ft-cd)
1 Foot-candle (ft-cd) = 10.76391 Lux (lx)
How to Convert Lux to Foot-candle
1 lx = 0.0929030436 ft-cd
1 ft-cd = 10.76391 lx
To convert Lux to Foot-candle, divide the value by 10.76391 (equivalently, multiply by 0.0929030436). To convert Foot-candle back to Lux, multiply by 10.76391.
Example: convert 10 lx to ft-cd:
10 lx = 10 x 0.0929030436 = 0.929030436 ft-cd
Lux
Definition: Lux (lx) is the SI derived unit of illuminance, measuring luminous flux per unit area. It quantifies the amount of light falling on a surface.
History/origin: The lux is derived from the candela, the SI base unit of luminous intensity, and the square meter. It was developed as a standardized measure of light intensity to provide a consistent way to assess lighting levels.
Current use: Lux is widely used in lighting design, photography, and workplaces to ensure adequate illumination. It is also used in scientific instruments and environmental monitoring to measure light levels.
Foot-candle
Definition: A foot-candle (symbol: ft-cd) is a non-SI unit of illuminance or light intensity. It is defined as the amount of light cast by one candle on a surface one foot away. It is equal to one lumen per square foot.
History/origin: The foot-candle originated from the historical practice of measuring light intensity based on the light emitted by a standard candle. The distance was set at one foot, hence the name foot-candle. It was a common unit before the adoption of SI units.
Current use: While less common than the SI unit lux, foot-candles are still used in some industries, particularly in the United States, for specifying lighting requirements in building codes, photography, and certain scientific applications. It provides a practical and easy-to-understand measure of light intensity for certain contexts.
Lux to Foot-candle Conversion Table
| Lux [lx] | Foot-candle [ft-cd] |
|---|---|
| 1 lx | 0.0929030436 ft-cd |
| 2 lx | 0.1858060872 ft-cd |
| 5 lx | 0.464515218 ft-cd |
| 10 lx | 0.929030436 ft-cd |
| 20 lx | 1.858060872 ft-cd |
| 50 lx | 4.64515218 ft-cd |
| 100 lx | 9.29030436 ft-cd |
| 200 lx | 18.58060872 ft-cd |
| 500 lx | 46.4515218 ft-cd |
| 1000 lx | 92.9030436 ft-cd |
Common Lux to Foot-candle conversions
- 1 lx = 0.0929030436 ft-cd
- 2 lx = 0.1858060872 ft-cd
- 3 lx = 0.2787091308 ft-cd
- 4 lx = 0.3716121744 ft-cd
- 5 lx = 0.464515218 ft-cd
- 6 lx = 0.5574182616 ft-cd
- 7 lx = 0.6503213052 ft-cd
- 8 lx = 0.7432243488 ft-cd
- 9 lx = 0.8361273924 ft-cd
- 10 lx = 0.929030436 ft-cd
- 12 lx = 1.114837 ft-cd
- 15 lx = 1.393546 ft-cd
- 20 lx = 1.858061 ft-cd
- 25 lx = 2.322576 ft-cd
- 30 lx = 2.787091 ft-cd
- 40 lx = 3.716122 ft-cd
- 50 lx = 4.645152 ft-cd
- 60 lx = 5.574183 ft-cd
- 75 lx = 6.967728 ft-cd
- 100 lx = 9.290304 ft-cd
- 150 lx = 13.935457 ft-cd
- 200 lx = 18.580609 ft-cd
- 250 lx = 23.225761 ft-cd
- 300 lx = 27.870913 ft-cd
- 500 lx = 46.451522 ft-cd
- 750 lx = 69.677283 ft-cd
- 1,000 lx = 92.903044 ft-cd
Common pairs of Illuminance
Foot-candle