Illumination Converter
Convert illumination across 5 supported units with free instant calculations, formula guidance and examples. No sign-up required.
Calculations run in your browser. Results use approximately 12 significant digits, with floating-point rounding. Verify safety-critical measurements against applicable standards.
About Illumination conversion
Convert between 5 illumination units, including Lux (lux), kilolux, millilux, foot candle, phot. Results update immediately when you edit the number or select another unit.
Use the exact unit labels: US and imperial variants are not always interchangeable.
Example calculation
1 lux = 0.001 kilolux. For linear quantities, multiply the source amount by the ratio of the two fixed reference-unit factors.
How to use
- Enter your amount in the field above.
- Select the original and destination illumination units.
- Copy the calculated result or swap the units to reverse the conversion.
Frequently asked questions
Can I convert illumination units for free?
Yes, the calculation runs locally in your browser with no sign-up.
Which units are supported?
This category currently includes 5 entries. Select the units from the dropdowns above.
Are the results suitable for professional use?
Use the exact unit labels: US and imperial variants are not always interchangeable. Check critical work against an applicable standard.
Related conversions
Luminance · Luminous Intensity
Unit definition reference: NIST Guide to the SI.