# Lumens to candela calculator

Lumens (lm) to candela (cd) calculator and how to calculate.

## Lumens to candela calculator

Enter the luminous flux in lumens, apex angle in degrees and press the Calculate button to get the luminous intensity in candela:

 Enter luminous flux in lumens: lm Enter apex angle in degrees: º Luminous intensity result in candela: cd

Candela to lumens calculator ►

### Lumens to candela calculation

For uniform, isotropic light source, the luminous intensity Iv in candela (cd) is equal to the luminous flux Φin lumens (lm),

divided by the solid angle Ω in steradians (sr):

Iv(cd) = Φv(lm) / Ω(sr)

So The solid angle Ω in steradians (sr) is equal to 2 times pi times 1 minus cosine of half the apex angle θ in degrees (°).

Ω(sr) = 2π(1 - cos(θ/2))

So The luminous intensity Iv in candela (cd) is equal to the luminous flux Φin lumens (lm),

divided by 2 times pi times 1 minus cosine of half the apex angle θ in degrees (°).

Iv(cd) = Φv(lm) / ( 2π(1 - cos(θ/2)) )

So

candela = lumens / ( 2π(1 - cos(degrees/2)) )

Or

cd = lm / ( 2π(1 - cos(°/2)) )

#### Example 1

Find the luminous intensity Iv in candela (cd) when the luminous flux Φin lumens (lm) is 350lm and the apex angle is 60°:

Iv(cd) = 350 lm / ( 2π(1 - cos(60°/2)) ) = 415.7 cd

#### Example 2

Find the luminous intensity Iv in candela (cd) when the luminous flux Φin lumens (lm) is 370lm and the apex angle is 60°:

Iv(cd) = 370 lm / ( 2π(1 - cos(60°/2)) ) = 439.5 cd

#### Example 3

Find the luminous intensity Iv in candela (cd) when the luminous flux Φin lumens (lm) is 400lm and the apex angle is 60°:

Iv(cd) = 400 lm / ( 2π(1 - cos(60°/2)) ) = 475.1 cd

#### Example 4

Find the luminous intensity Iv in candela (cd) when the luminous flux Φin lumens (lm) is 500lm and the apex angle is 60°:

Iv(cd) = 500 lm / ( 2π(1 - cos(60°/2)) ) = 593.9 cd

#### Example 5

Find the luminous intensity Iv in candela (cd) when the luminous flux Φin lumens (lm) is 1000lm and the apex angle is 60°:

Iv(cd) = 1000 lm / ( 2π(1 - cos(60°/2)) ) = 1187.9 cd

Lumens to candela calculation ►

## Features of Lumens to candela Calculator

Our Lumens to candela Calculator allows the users to Calculate Lumens to candela . Some of the prominent features of this utility are explained below.

#### No Registration

You don’t need to go through any registration process to use the Lumens to candela Calculator. Using this utility, users to Calculate Lumens to candela as many times as you want for free.

#### Fast conversion

This Lumens to candela Calculator offers users the fastest Calculate. Once the user enters the  Lumens to candela values ​​in the input field and clicks the Calculate button, the utility will start the conversion process and return the results immediately.

#### Saves Time and Effort

The manual procedure of Calculator Lumens to candela isn’t an easy task. You must spend a lot of time and effort to complete this task. The Lumens to candela Calculator allows you to complete the same task immediately. You will not be asked to follow manual procedures, as its automated algorithms will do the work for you.

##### Accuracy

Despite investing time and effort in manual Calculation, you might not be able to get your hands on accurate results. Not everyone is good at solving math problems, even if you think you're a pro, there's still a good chance you'll get in accurate results. This situation can be smartly handled with the help of a Lumens to candela Calculator. You will be provided with 100% accurate results by this online tool.

##### Compatibility

The online Lumens to candela converter perfectly works on all operating systems. Whether you have a Mac, iOS, Android, Windows, or Linux device, you can easily use this online Tool without facing any hassle.

###### 100% Free

You don't need to go through any registration process to use this Lumens to candela Calculator. You can use this utility for free and do unlimited Lumens to candela Calculate without any limitations.