Millicandela (mcd) ↔ Lumen (lm) Converter

LED Luminous Flux Calculator
mcd ↔ lm
Millicandela (mcd) describes the brightness in one direction, while lumen (lm) represents the total luminous flux. The conversion requires the beam angle.
Luminous flux:
0.00 lm
Luminous intensity:
0.00 mcd
Formulas used
Lumen = (mcd ÷ 1000) × 2π × (1 − cos(beam angle ÷ 2))
mcd = (Lumen ÷ (2π × (1 − cos(beam angle ÷ 2)))) × 1000
Typical beam angles
LED type Beam angle
LED spotlight (directional) 15° – 45°
LED reflector 35° – 60°
Standard LED 90° – 120°
Diffuse LED lamp 180° – 360°

Note: The results are theoretical approximations and may differ from actual measured values.