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Illuminance Converter – 4 units of illuminance

Convert illuminance between lx, fc and more – exact and instant.

1 lx = 0.09290304 fc

Formula: fc = lx × 0.09290304

Common values
Decimals
In every unit 4 units
Lux (lx) 1 lx
Kilolux (klx) 0.001 klx
Foot-candle (fc) 0.09290304 fc
Phot (ph) 0.0001 ph

Convert on our server?

If you continue, the file is uploaded over an encrypted connection and converted on our server. You can keep using the site meanwhile. The original is deleted as soon as it is converted; the result is kept for 6 hours so you can download it, and you can delete it at any time. Files are never shared or used for anything else.

Calculated in your browser – nothing you type is sent anywhere. Privacy details

Units of illuminance

Lux (lx)SI (metric) unit
Kilolux (klx)SI (metric) unit1 klx = 1,000 lx
Foot-candle (fc)imperial and US customary unit1 fc = 10.76391042 lx
Phot (ph)CGS unit1 ph = 10,000 lx

How to use: Illuminance Converter

  1. 1 Pick the unit you have and the unit you need.
  2. 2 Type the value – the result in the other unit appears at once (type in the result field to convert back).
  3. 3 Use a common value, set the decimals or swap the units with one click.
  4. 4 Open “In every unit” to see the value in all 4 units of illuminance.

About this tool

Illuminance is how much light falls on a surface: lux in the SI, foot-candles in the US.

Here every value is converted through the lux (lx). Choose any two of the 4 units below the converter, or start from one of the popular conversions.

Calculated in your browser – nothing you type is sent anywhere.

Frequently asked questions

Which units of illuminance can I convert?

Lux (lx), Kilolux (klx), Foot-candle (fc) and Phot (ph).

Which illuminance conversions are used most?

1 lx = 0.09290304 fc.

How exact is the converter?

Each unit is defined by its official value in lx, so conversions are exact up to the 10 significant digits shown; you can round to 0–6 decimals.

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