Lux to Footcandles Calculator

What are Lux and Footcandles?

Lux (lx) and footcandles (fc) are both units of illuminance, which measures the amount of light that falls on a surface. Lux is the SI unit, while footcandles are commonly used in the United States.

The Lux to Footcandles Formula

The formula for converting lux to footcandles is:

\[1 \text{ lux} = \frac{1}{10.764} \text{ footcandles}\]

Or more generally:

\[\text{Footcandles} = \frac{\text{Lux}}{10.764}\]

Step-by-Step Lux to Footcandles Calculation

1. Identify the illuminance value in lux.
2. Divide the lux value by 10.764.
3. The result is the illuminance in footcandles.

Example Calculation

Let's convert 1000 lux to footcandles:

1. Illuminance in lux = 1000 lx
2. \[\begin{align} \text{Footcandles} &= \frac{1000}{10.764} \\ &\approx 92.903 \text{ fc} \end{align}\]

Visual Representation

This diagram illustrates the relationship between 1000 lux (left, yellow) and 92.903 footcandles (right, orange). The height of each bar represents the relative illuminance level.