Footcandle → Lux
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The footcandle to lux calculator converts light intensity units from the imperial system (footcandle) to the metric system (lux). It multiplies the footcandle value by 10.764 to obtain lux, since 1 footcandle equals 10.764 lux. This conversion is critical for lighting projects requiring alignment with international equipment specifications or standards.
Footcandle is commonly used in the United States, whereas lux is the standard unit in other countries. The tool is useful in electrical engineering, architecture, and industrial maintenance, where precise data ensures compliance with regulations. For example, commercial or industrial lighting projects may require this conversion to select appropriate luminaires.
When using the tool, ensure input values match the correct unit and that results meet project requirements. Common errors include confusing footcandle with other terms like lux or lumen, which measure different concepts. Verifying units at the start of the process prevents rework.
Frequently asked questions
Why convert footcandle to lux?
Footcandle is an imperial unit used primarily in the US, whereas lux is the global metric standard. This conversion is necessary for international projects or equipment using metric norms.
How does the calculator work?
The calculator multiplies the footcandle value by 10.764, the conversion factor. For example: 2 footcandle = 2 × 10.764 = 21.528 lux.
Are there any precautions when using this tool?
Ensure input values are in footcandle and the result meets project specifications. Avoid confusion with other units like lumen or candela.
Is there an inverse calculator (lux to footcandle)?
Yes, divide lux by 10.764. Example: 100 lux ÷ 10.764 ≈ 9.29 footcandle.