Candela to Lumens Converter

Convert between candela (luminous intensity) and lumens (luminous flux). The relationship depends on the beam angle — a narrow spot packs the same lumens into a tighter cone, producing much higher candela.

Conversion direction
Beam angle — click a preset or enter custom
Narrow spot
10 deg
Spot
25 deg
Medium
36 deg
Wide
60 deg
Flood
90 deg
Wide flood
120 deg
Hemisphere
180 deg
Full sphere
360 deg

Please enter a beam angle and value.

Result
0 lm
0
Candela (cd)
0
Lumens (lm)
0 sr
Solid angle (sr)
Beam cone and solid angle visualisation
Calculation
Candela at same lumens — how beam angle changes intensity
Beam angleSolid angleCandelaLumensvs yours
Beam angle
Solid angle (steradians)
Candela
Lumens
Formula
1 lux at 1 metre =
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The calculators and tools on LightingCalc.lighting are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. LightingCalc.lighting makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.