Lux to Foot-Candles Converter — Illuminance

Convert illuminance between lux, kilolux, foot-candles, and phots.

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How this conversion works. Illuminance is converted through the lux; the foot-candle uses the exact square-foot relation from NIST Special Publication 811.

How to use

  1. Choose the units to convert from and to.
  2. Enter a value — the converted result updates instantly.
  3. Click Copy to copy the result to your clipboard.

Frequently asked questions

How do I convert foot-candle to lux?

1 foot-candle = 10.7639 lux. Choose "Foot-candle (fc)" as From and "Lux (lx)" as To, type a value, and the result updates instantly.

How many lux is one foot-candle?

10.7639 lx — one lumen per square foot versus per square meter, so the ratio is exactly 1/0.09290304. Quick rule: multiply fc by ~10.8.

What illuminance levels are typical?

Office work: 300–500 lx (30–46 fc); detailed tasks: 750–1,000 lx; overcast daylight: ~1,000 lx; direct sun: over 100,000 lx.

Is my data sent to a server?

No. Conversions run entirely in your browser using fixed factors — nothing is uploaded or logged.

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