Illuminance Converter
Convert between lux, foot-candles and other illuminance units in one click.
The Illuminance Converter is a free online tool that converts light-level measurements between lux and foot-candles instantly. No sign-up required — enter a value, choose your units, and get an accurate result. It's a practical reference for photographers, lighting designers, and facility managers checking workplace lighting standards.
What is illuminance?
Illuminance measures how much light falls on a surface. Lux is the metric unit used internationally, while foot-candles remain common in the United States for lighting design, photography, and workplace safety standards. Converting between the two helps professionals compare lighting specifications across regions and standards. Building codes and safety guidelines often specify minimum lighting levels, so accurate unit conversion matters for compliance checks.
How to use the Illuminance Converter
- Enter the illuminance value you want to convert.
- Select the unit to convert from — lux or foot-candles.
- Click Calculate to see the converted result.
Key features
- Converts between lux and foot-candles accurately.
- Useful for lighting design, photography and safety compliance.
- Instant, two-way conversion with no manual math.
- Free and works directly in your browser.
Related tools
Working with related measurements? Try the Energy Converter, Power Converter, or the Area Converter.
Frequently asked questions
Is the Illuminance Converter free?
Yes, completely free with no sign-up or usage limits. There's no limit on how many readings you can convert.
How many lux are in a foot-candle?
One foot-candle equals approximately 10.764 lux. This conversion factor is useful when comparing light meter readings taken in different unit systems.
Where is illuminance measured?
Illuminance is measured on a surface — such as a desk, a stage, or a photography set — to assess how well-lit it is. A brighter reading means more usable light is reaching that surface for tasks like reading or detailed work.
Who typically needs this conversion?
Lighting designers, photographers, architects, and safety inspectors often need to convert between lux and foot-candles when comparing specifications from different regions. Comparing specifications accurately helps ensure a space meets recommended brightness levels for its intended use.
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