Easily convert candela to lumens using the calculator below. Simply enter the candela value and beam angle to see the result in lumens.
Candela to Lumen Calculator
What Is Candela to Lumen Conversion?
Candela (cd) measures the intensity of light in a particular direction.
Lumens (lm) measure the total visible light emitted in all directions.
How to Convert Candela to Lumens?
It’s simple. You just need two things:
- The candela value
- The beam angle (in degrees)
Enter those into our calculator and get the result instantly.
Candela to Lumen Conversion Formula
Here’s the exact formula:
Lumens = Candela × 2π × (1 – cos(θ/2))
Where:
- θ is the beam angle in degrees
- π is a constant (about 3.1416)
- cos refers to the cosine function in math
This formula calculates the total light output based on direction and spread.
Why Use The Candela to Lumens Calculator?
Manual calculations can be tricky.
This calculator gives fast, accurate results—no math needed.
It’s perfect for lighting designers, electricians, engineers, and curious homeowners.
FAQs
How do I convert candela to lumens without a calculator?
Use the formula: Lumens = Candela × 2π × (1 – cos(θ/2)). You’ll need to use a calculator that handles trigonometric functions.
Why does the beam angle matter?
Beam angle affects how widely the light spreads. A wider angle spreads light over a larger area, changing total lumens.
Can I use this for LED or flashlights?
Yes! This tool works great for LED lights, flashlights, and other directional light sources.
Try the calculator now and see how bright your lights really are!
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