Free Foot Lambert Calculator by Electronics Feed

How It Works

Start with your screen’s aspect ratio, or provide custom dimensions. You can provide either the diagonal size, width, or height – we’ll convert the dimensions for your convenience!

We all buy projector to watch our favorite content on the screen. But have you ever wondered how to determine how birhgt the image from projector will be on the screen?

Well, I have the same question and there was no way to know that, unless you know a lot of calculations. Worry not! I present you an extremely accurate Goot Lambert Calculator.

This calculator is designed to calculate the projector brightness on a screen based on projector’s lumens, screen size, and screen gain. This guide will walk you through how to use the calculator and why understanding foot-lamberts is crucial for achieving optimal image brightness.

What Is a Foot Lambert?

So now the question is, what is foot lambert?
A foot lambert (ftL) is the measurement of brightness. It’s calculated by the amount of light emitted by the projector, the screen size, and the screen gain.

In simpler terms, foot-lamberts measure how bright an image will appear when projected onto a surface.

Why do you need to use a Foot Lambert Calculator?

Having the correct foot-lambert value is very important to ensure your projector’s image is bright enough on the screen. It should be good and doesn’t matter whether you’re watching a movie in a dark room or giving a presentation in a well-lit space.

Knowing your foot-lambert value will always help you adjust your setup for the best visual experience. Using our foot lambert calculator is a fast and easy way to determine this without the need for complex calculations.

How to Use the Foot Lambert Calculator:

Using our foot lambert calculator is simple. Follow these steps:

Step 1: Choose Aspect Ratio: Available aspect ratios are HDTV [16:9, WIDESCREEN WUXGA [16:10], CINEMASCOPE [2.35:1], CINEMASCOPE [2.4:1], VIDEO [4:3], SQUARE [1:1]
Step 2: Enter Projector Lumens : Input the lumens rating of your projector. This is typically listed in the projector’s specifications.
Step 3: Adjust Screen Gain: Use the plus (+) and minus (-) buttons to adjust the screen gain. Most screens have a gain value of 1.0, but it can vary.
Step 4: Provide Screen Dimensions: Enter the diagonal size, width, and height of your screen. You can alternatively give a diagonal size and it will automatically calculate width and height for you.
Step 5: Click Calculate: The calculator will then display the results in footlamberts, along with helpful recommendations based on your specific setup.

How to Read the Results

Once you use the Foot Lambert Calculator, the results will tell you the brightness of the image in foot-lamberts (ftL) and a recommendation for viewing environments:

Here is one example:
Let’s take a quick example. If you have a projector that outputs 1000 lumens and you’re using a 16:9 aspect ratio screen with a screen gain of 1, and a diagonal size of 120 inches, you can calculate the following:

Screen Width: 120 inches
Screen Height: 58.82 inches
Screen Area: 58.83 square feet
Foot-Lamberts: 0.16 ftL
With this result, you’ll know that your projector setup is ideal for a dark room or home theater setting.

Conclusion

Using a foot-lambert calculator is a straightforward and effective method to determine the brightness of your projected image. It considers important factors such as projector lumens, screen size, and screen gain, providing valuable recommendations to enhance your viewing experience.Whether you’re setting up a home theater or preparing for a presentation, knowing your foot lamberts helps ensure a bright and clear display.

Try our Foot Lambert Calculator now and find out if your projector setup is delivering the brightness you need for your environment.

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