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Photometry

fctoph

Convert foot-candles (fc) to phots (ph).

Factor1 fc = 0.001076391 ph

Converter

fc

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

Result
1.07639ph

Rendered to 6 significant figures.

Formula

Formula
ph = fc × 0.001076391

Multiply any value in foot-candles by 0.001076391 to obtain the value in phots.

Worked example

Convert 1000 fc to ph.

  1. 01Start with 1000 fc.
  2. 02Multiply by the conversion factor: 1000 × 0.001076391 = 1.07639 ph.
Result1000 fc = 1.07639 ph

Conversion table

fcph
10.0010764
20.0021528
50.005382
100.010764
200.021528
500.05382
1000.10764
2000.21528
5000.5382
10001.0764

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from fc to ph?
1 fc equals 0.001076391 ph. To convert, multiply the value in foot-candles by 0.001076391.
How do I convert 1 fc to ph?
1 fc = 0.00107639 ph. For any value, multiply by 0.001076391.
How do I convert ph back to fc?
Divide by the same factor — or equivalently, multiply by 929.0304. So 1 ph = 929.03 fc.
When would I need to convert foot-candle to phot?
Illuminance conversions between fc and ph 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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