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. Pick the unit you are converting from, such as Kilolux (klx) or Lux (lx).
  2. Type the value and every other unit updates as you type.
  3. Copy the figure you need, or use the swap button to reverse the direction, Nox (nx) included.

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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