LED Lux & Lumen Calculator

For lighting designers, contractors & architects — required lumens, number of luminaires, and achieved illumination level for a room (lumen method).

Room
Luminaire & factors
Room area
– m²
Required lumens
– lm
Number of lights
– pcs
Achieved illuminance
– lx
Total power
– W
Φrequired = (E × A) / (UF × MF) · N = ceil(Φrequired / lumens per fixture) · Eachieved = (N × lm × UF × MF) / A — standard lumen method (IES).