Lux to candela free online calculation

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

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

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

• Lux to candela calculation with distance in feet
• Lux to candela calculation with distance in meters

Lux to candela calculation

Lux to candela calculation with distance in feet

The luminous intensity I_v in candela (cd) is equal to 0.09290304 times the illuminance E_v in lux (lx),

times the square distance from the light source d² in square feet (ft²):

I_v(cd) = 0.09290304 × E_v(lx) × (d_(ft))²

So

candela = 0.09290304 × lux × square feet

Or

cd = 0.09290304 × lx × ft²

Lux to candela calculation with distance in meters

The luminous intensity I_v in candela (cd) is equal to the illuminance E_v in lux (lx),

times the square distance from the light source d² in square meters (m²):

I_v(cd) = E_v(lx) × (d_(m))²

So

candela = lux × square meters

Or

cd = lx × m²

Candela to lux caluclation »