Lux to lumens calculator

Enter Illuminance in lux: lx
Select area unit type:  
Enter spherical radius:
Or enter surface area:
   
Luminous flux result in lumens: lm

The lumen is a measure of the total "amount" of visible light. The lumen is the SI derived unit of luminous flux (symbol: lm).

The lux is a measnure luminous flux per unit area. It is the SI unit of illuminance and luminous emittance (symbol: lx).

Calculation with area in square meters formula

ΦV(lm) = Ev(lx) × A(m2) = Ev(lx) × 4·π·r 2(m2)

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