Best Alternative rapidtables.com tool to conversion from candela (cd) to lumens (lm) depends on the beam angle of the light source.
Enter the luminous flux in lumens, apex angle in degrees and press the Calculate button and to get the luminous intensity in candela:
Candela to Lumens Calculator
Lumens: 0
The formula is:
Lumens=Candela×2π×(1−cos(θ/2))