Easily convert lumens to candela with our free online calculator.
Simply enter the lumens and beam angle in degrees to get accurate candela results instantly—no manual calculations needed.
Lumens to Candela Calculator
What is Lumens vs Candela?
Lumens measure the total light emitted by a source.
Candela measures how intense that light is in a specific direction.
In simple terms, lumens describe brightness, while candela focuses on beam intensity.
How to Convert Lumens to Candela
To convert, you need the lumens and the beam angle in degrees.
Our calculator makes it easy — just enter the values and get instant results.
Lumens to Candela Formula
The standard lumens to candela formula is:
Candela = Lumens ÷ Beam Angle (in steradians).
Since beam angles are usually in degrees, the formula becomes:
Candela = Lumens ÷ [2π × (1 - cos(θ ÷ 2))] where θ is in degrees.
Lumen to Candela Conversion Chart
How many lumens are in a candela?
There isn’t a fixed number because it depends on the beam angle.
1 candela can represent more or fewer lumens based on how spread out the light is.
A wide beam (180°) spreads the light, so the candela value is lower.
A narrow beam (10°) produces a very high candela value (focused intensity).
