Illuminance Converter
Convert between lux, foot-candles, phot and other illuminance units.
Illuminance measures how much light falls on a surface, and it's quoted in lux almost everywhere except the US, where foot-candles still dominate lighting design and photography. A well-lit office targets around 500 lux; a foot-candle is about 10.76 lux, so the two numbers look very different for the same brightness.
This converter moves any value between lux, kilolux, foot-candles, phot and nox instantly, so you can check a lighting spec, match a photography meter reading, or verify a workplace illumination standard without hunting for the conversion factor.
How to use Illuminance Converter
- 1
Enter a value
Type the amount you want to convert.
- 2
Choose the source unit
Pick the unit you're converting from.
- 3
Choose the target unit
The converted value appears instantly.
Features
- Instant bidirectional conversion
- Standards-based conversion factors
- Precise results as you type
Frequently asked questions
Common mistakes to avoid
- Mixing up unit prefixes across several orders of magnitude.
- Confusing similar-looking units from different systems.
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