How to convert luminous intensity in candela (cd) to illuminance in lux (lx).

You can calculate lux from candela and distance from light source.

You can't convert candela to lux, since lux and candela do not represent the same quantity.

## Candela to lux calculation

### Candela tp lux calculation with distance in feet

The illuminance *E*_{v} in lux (lx) is equal to 10.76391 times the luminous intensity *I*_{v} in candela (cd),

divided by the square distance from the light source *d*^{2} in square feet (ft^{2}):

*E*_{v(lx)} = 10.76391 ×* I*_{v(cd)} / (*d*_{(ft)})^{2}

_{So}

lux = 10.76391 ×* *candela / square feet

_{Or}

lx = 10.76391 ×* *cd / ft^{2}

### Candela to lux calculation with distance in meters

The illuminance *E*_{v} in lux (lx) is equal to the luminous intensity *I*_{v} in candela (cd),

divided by the square distance from the light source *d*^{2} in square meters (m^{2}):

*E*_{v(lx)} = *I*_{v(cd)} / (*d*_{(m)})^{2}

_{So}

lux = candela / square meters

_{Or}

lx = cd / m^{2}

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