## Lux to lumens calculator

We are offering online calculator to help you make calculations with Illuminance in lux (lx) to luminous flux in lumens (lm) to help you calculate.

You simply need to enter the illuminance in lux (lx), then select area unit type, and enter the radius in meters for spherical light source or the surface area which is measured in square meters for any light source and hit the = button to obtain the luminous flux in lumens (lm).

## Lux to lumens calculation formula

#### Calculation with area in square feet

The value of luminous flux *Φ*_{V} in lumens (lm) is apparently equal to 0.09290304 times the value of illuminance *E*_{v} in lux (lx) multiplied by the surface area *A* measured in square feet (ft^{2}).

**Φ _{V(lm)} = 0.09290304 × E_{v(lx)} × A_{(ft}2_{)}**

The luminous flux *Φ*_{V} measured in lumens (lm) is apparently equal to 0.09290304 times the illuminance *E*_{v} measured in lux (lx) multiplied by the 4 times the value of pi multiplied by the squared sphere with radius r in feet (ft).

**Φ _{V(lm)} = 0.09290304 × E_{v(lx)} × 4⋅π⋅r_{(ft)} ^{2}**

#### Calculation with area in square meters

The luminous flux *Φ*_{V } measured in lumens (lm) is apparently equal to the illuminance *E*_{v} measured in lux (lx), multiplied by the surface area *A* measured in square meters (m^{2}).

**Φ _{V(lm)} = E_{v(lx)} × A_{(m}2_{)}**

The luminous flux * Φ*_{V} is apparently measured in lumens (lm) is equal to the value of illuminance *E*_{v} measured in lux (lx) times 4 times the value of pi multiplied by the squared sphere with radius r in meters (m).

*Φ*_{V(lm)} = *E*_{v(lx)}* *×* *4⋅π⋅*r *^{2}_{(m}2_{)}