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Photometry

fctolx

Convert foot-candles (fc) to lux (lx).

Factor1 fc = 10.76391 lx

Converter

fc

Accepts numbers or expressions, e.g. 150 + 14.7

Result
538.196lx

Rendered to 6 significant figures.

Formula

Formula
lx = fc × 10.76391

Multiply any value in foot-candles by 10.76391 to obtain the value in lux.

Worked example

Convert 50 fc to lx.

  1. 01Start with 50 fc.
  2. 02Multiply by the conversion factor: 50 × 10.76391 = 538.196 lx.
Result50 fc = 538.196 lx

Conversion table

fclx
110.764
221.528
553.82
10107.64
20215.28
50538.2
1001076.4
2002152.8
5005382
100010764

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from fc to lx?
1 fc equals 10.76391 lx. To convert, multiply the value in foot-candles by 10.76391.
How do I convert 1 fc to lx?
1 fc = 10.7639 lx. For any value, multiply by 10.76391.
How do I convert lx back to fc?
Divide by the same factor — or equivalently, multiply by 0.09290304. So 1 lx = 0.092903 fc.
When would I need to convert foot-candle to lux?
Illuminance conversions between fc and lx are used in lighting design, workplace safety assessments, and photographic exposure work. Lux is the SI standard for international codes; foot-candles remain common in US lighting specifications.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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