Lumens to Lux conversion

Enter the luminous flux in lumens, choose the area unit type, enter a radius in meters for a spherical light source or a surface area in square meters for any light source and press the Calculate button:

 Lumens: lm Area unit type: Area in square feet Area in square meters Spherical radius: Surface area: Result (lux): lx
 Lumens to Lux calculation formula Calculation with area in square feet The illuminance Ev in lux (lx) is equal to 10.76391 times the luminous flux Φv in lumens (lm) divided by the surface area A in square feet (ft2): Ev(lx) = 10.76391 * Φv(lm) / A(ft2) The illimunance Ev in lux (lx) is equal to 10.76391 times the luminous flux Φv in lumens (lm) divided by 4 times pi times the squared sphere radius r in feet (ft): Ev(lx) = 10.76391 * Φv(lm) / (4 * π * r(ft)2)

 Calculation with area in square meters The illuminance Ev in lux (lx) is equal to the luminous flux Φv in lumens (lm) divided by the surface area A in square meters (m2): Ev(lx) = 10.76391 * Φv(lm) / A(m2) The illimunance Ev in lux (lx) is equal to the luminous flux Φv in lumens (lm) divided by 4 times pi times the squared sphere radius r in meters (m): E v(lx) = Φ v(lm) / (4 * π * r (m)2)