8 Best Free Online mcd to Lumens Conversion Calculators

Here is a list of the best free online mcd to lumens conversion calculators. mcd and lumens are the two measurements of light. Millicandela (mcd) is used to measure Luminous Intensity while lumens (lm) is used to measure Luminous Flux. These two terms are related but represent different aspects of light. Luminous Intensity measures the brightness of light in a specific direction. And Luminous Flux measures the total amount of visible light emitted in all directions.

Luminous Intensity and Luminous Flux are related based on the angular distribution of the light. By knowing the at which angle the light is emitting from the sources, you can easily convert Luminous Intensity (mcd) to Luminous Intensity (lumens) and vice versa.

This post covers 8 free websites that can convert mcd to lumens online. These websites featured dedicated converter calculators where you can convert mcd value to lumens value. To do that, you have to add the Luminous Intensity in mcd along with the beam angle. This gets you the Luminous Flux which is lumens.

My Favorite Online mcd to Lumens Conversion

OhmsLawCalculator.com is my favorite mcd to lumens conversion calculator on this list. This conversion calculator has a nice interface where you can read about the formula on which the converter is based. Also, it has a versatile calculator that can also perform the reverse conversion from lumens to mcd.

You can check out our other lists of the best free online Beam Spread Calculator websitesonline Luminous Intensity Calculator websites, and online LED Resistor Calculator websites.

Comparison Table:

Namemcd to lumensLumens to mcd


OhmsLawCalculator.com is a free website that offers a set of online Resistance, LED, and other calculators. It has an mcd to Lumens Converter that calculates the luminous flux for LEDS where the angle is known. This tool has three parameters for calculations; Luminous Intensity, Beam Angle, and Luminous Flux. You have to enter the Luminous Intensity, Beam Angle into the calculator. With that, it gets you the value of Luminous Flux in Lumens. This way, it converts mcd to lumens.

Additional Features:

  • This calculator can perform reverse calculations to convert lumens to mcd and calculate beam angle.
  • It provides the formula used along with an explanation.


RapidTables.com provides variety of online calculators for Maths, Physics, Conversions, etc. Under its Lighting Calculators, it has a Millicandela to Lumens calculator. This calculator converts mcd to lumens. To perform the calculation, it asks you to add the Luminous intensity in mcd along with apex angle in degrees. You can simply add those values and perform the calculation by clicking on the Calculate button. Doing this shows you the luminous flux result in lumens.

Additional Features:

  • This calculator explains the Millicandela to lumens calculations for uniform isotropic light sources.


Calculatorology.com is a free website where you can convert mcd to lumens online. This website has a simple conversion tool for this. The tool asks you to enter the Luminous intensity result in millicandela along with the apex angle in degrees. Add the values and click the Calculate button. Doing this gets you the luminous flux in lumens. It shows the lumens right below the Calculate button. You can also reset the calculator and quickly perform back-to-back conversion calculations.

Additional Features:

  • The web page explains Millicandela to lumens calculator with an example problem and stepwise solution.


CommercialLEDLights.com is an online store that provides industrial and commercial LED lighting. This website also features a Candela (millicandela) to Lumen Conversion Calculator. This calculator lets you convert Luminous Intensity (millicandelas) to Luminous Flux (lumens). You can visit the calculator directly using the link added below. Then you can simply add your values in mcd along with the beam angle and perform the conversion. Within seconds, it converts the values from mcd to lumens and shows that on the screen.

Additional Features:

  • The web page of this calculator explains the purpose of this calculator along with basic lighting terminology.


CalculatorX.com is another website where you can find calculators and converters. This website offers lightning calculators that also include a Millicandela to lumens calculator. This calculator converts the luminous intensity to luminous flux based on the apex angle. To perform the calculation, you have to add the mcd value of luminous flux and the degrees of apex angle. Below that, you get two buttons, one to Calculate and another to Reset. From there, you can use the Calculate button to get luminous flux in lumens.

Additional Features:

  • You get the Millicandela to lumens calculation formula along with the involved terms explained.


AllAboutCircuits.com has a mcd to lumens calculator for calculating the luminous flux for LEDs where the angle is known. This is another simple calculator that converts Luminous Intensity into Luminous Flux based on the beam angle of the light. You can provide the Luminous Intensity in mcd and then fill in the beam angle to get the Luminous Intensity in lumens. This way, you can easily convert mcd to lumens using this calculator.

Additional Features:

  • This web page gives an overview of the Luminous flux (in lumens).
  • It also covers the Luminous flux formula along with applications.


ElectronicsForU.com has a free mcd to lumens calculator that is useful for calculating the luminous flux for LEDs where the angle is known. The calculator has an interactive interface marking the inputs and outputs. The input section has Luminous Intensity and Beam Angle. And the output section has Luminous Flux. You can simply add the inputs and then run the calculator. This gives you the Luminous Flux in lumens.

Additional Features:

  • No additional information or explanation.


FindMyTotal.com is another free website where you can convert mcd to lumens online. It has a simple converter calculator that takes the Luminous intensity in millicandela and converts that to Luminous flux in lumens. You just have to enter the mcd value and apex angle into the tool. When you do that, it instantly givens you the lumens value in the result.

Additional Features:

  • This website also features over a dozen of other lightning unit conversion calculators.

Frequently Asked Questions

mcd (millicandela) is a unit used to measure the luminous intensity or brightness of an LED (Light-Emitting Diode). It represents one thousandth of a candela and helps quantify the LED's output in terms of its light-emitting capability.

One millicandela (1 mcd) represents a relatively low level of brightness. It is equivalent to one thousandth (1/1000) of a candela, which is the standard unit for measuring luminous intensity. While 1 mcd can provide a faint glow, it is generally considered a very low level of brightness compared to most lighting applications.

Millicandela (mcd) is measured using a photometer, which captures the light emitted from a source and quantifies its luminous intensity based on the human eye's sensitivity to different wavelengths. The resulting measurement in millicandelas represents the perceived brightness emitted in a specific direction.

Lumens (lm) is a unit used to measure the total amount of visible light emitted by an LED or any other light source. It quantifies the overall brightness of the light produced, taking into account all directions in which the light is emitted. The higher the number of lumens, the brighter the light emitted by the LED.

Millicandelas measure the brightness in a specific direction, while lumens quantify the total visible light emitted in all directions. The relationship between millicandelas (mcd) and lumens (lm) depends on the angular distribution of light emitted by the source, requiring additional information for conversion. 

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