Photometry Tools

Lux to Footcandles Calculator

Convert metric illuminance in lux (lx) to US standard imperial footcandles (fc).

Calculation Input

lx
Moonlight (1 lx) Dim Lobby (100 lx) Office Desk (500 lx) Bright Sunlight (5000 lx)

Footcandle Equivalency

0.00 fc
Normal Workspace Level
Illuminance Class Target Normal Office Reading
Exact Division Factor 10.76391

Metric to Imperial Illuminance Conversion

Footcandles ($fc$) and lux ($lx$) are parameters of illuminance. To convert metric lux to imperial footcandles, we divide by the constant conversion factor $10.76391$ representing the ratio of square feet to a square meter:

$$fc = \frac{lx}{10.76391}$$

One footcandle is equal to approximately $10.76391$ lux.

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