Illuminance Converter — Free Online Tool

Convert lux, foot-candles, phot and other light intensity units. Illuminance Converter is a free online tool from the ToolsRift Unit Converters collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.

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How to use Illuminance Converter

  1. Open the Illuminance Converter above — it loads instantly, no account needed.
  2. Enter or upload your input. Everything is processed locally on your device.
  3. Get your result immediately and copy or download it with one click.

Frequently asked questions

How many lux in a foot-candle?

1 foot-candle = 10.7639 lux.

What lux level is typical office lighting?

Office lighting is typically 300–500 lux; direct sunlight can exceed 100,000 lux.

What is a phot?

A phot is the CGS unit of illuminance, equal to 10,000 lux.

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