# 6 Best Free Online Beam Spread Calculator Websites

Here is a list of the **best free online beam spread calculator websites**. A beam spread is an area a light beam covers when it strikes an opaque surface. To calculate the light spread, you must know the distance between the light source and the surface where the light strikes. Also, you must know the angle at which the light is included towards that surface. With these two values, you can easily find out the diameter of the light spread.

I’m covering 6 free websites where you can calculate the beam spread within seconds. All you have to do is enter the light beam angle and the distance. All these websites use trigonometry to calculate the theoretical angle. In the output, you get the diameter of the light beam spread. And, if you need to find the area of the beam spread, you can use the diameter value to get the area. You can use this free online tool for that.

## My Favorite Beam Spread Calculator

All of these beam spread calculator websites are similar since there is only one way to calculate the beam spread area. Most of these websites can determine the beam angle, beam spread, and distance of the beam. Out of these three, you can enter any two values to get the third value. You can check these websites yourself and use the one you like.

You can also check out our lists of the best free Stage Lighting Software for Windows, Stage Lighting Apps for Android, and Light Pollution Map Apps for Android.

## Beam Angle Calculator by MarineBeam

**Beam Angle Calculator** is a free online tool by MarineBeam. This tool can calculate Beam Angle, Throw Distance, and Spot Size. It has three data fields for each of these items and uses trigonometry to calculate the spot size i.e., beam spread. Apart from the Spot Size, this tool can also calculate the Beam Angle and Throw Distance. To do that, you can add any of the two values to calculate the third one.

### How to calculate light beam spread on this website?

- Go to this calculator by following the link given below.
- Enter the throw distance and beam angle in the respective fields.
- Then click on the
**Calculate Spot Size**button to get the result. - The spot size result is your beam spread of the light.

## Beam Calculator by Stage Lighting Store

**Beam Calculator** is another simple beam spread calculator by Stage Lighting Store. This calculator can find the beam spread, beam angle, and the distance between the light source and the surface. You get a data file for each of these three data points. You can enter any two values to calculate the third one. In the case of beam spread, you can enter the distance and beam angle to find the beam spread value.

### How to calculate light beam spread on this website?

- Use the link given below to open this calculator in your browser.
- Enter the distance in the “
**How far away will the light be?**” field. - Then enter the beam angle in the “
**What degree is the lens?**” field. - Leave the “
**How wide will the light circle be?**” field empty. - Click on the calculate button to get the beam spread in the “
**How wide will the light circle be?**” field.

## Beam Angle & Light Spread Calculator

**Beam Angle & Light Spread Calculator** by Reduction Revolution is a free online tool where you can find the light beam angle and light beam spread. The Light Spread Calculator is simple to use on this website that you can use it to find the beam spread. It has a linear angle measure scale where you can set the scroll to any value. Then you can enter the distance to find the spread. Apart from that, you can also find Lighting Calculator, Light intensity Calculator, Lumen to Lux Calculator, and other similar types of calculators on this website.

### How to calculate light beam spread on this website?

- Head over to the Reduction Revolution website using the link given below.
- Scroll down to the
**Beam Angle & Light Spread Calculator**section. - Use the slider to set the light beam angle.
- Then enter the distance in meters.
- When you do that, it instantly shows you the beam spread value.

## Beam Angle Calculator by Enlightened

**Beam Angle Calculator** is a free tool by Enlightened to calculate light beam spread. This website offers a simple calculator where you can find out Throw Distance, Beam Angle, and Beam Size. The process is quite simple. You can enter any two values to find the third one. While using this calculator, do note that the angle must be in degrees, distance & size can be either feet or meters. It also offers a quick tool to convert feet into meters and vice-versa.

### How to calculate light beam spread on this website?

- Follow the link given below to open the calculator.
- Type the Throw Distance and the Beam Angle values in the calculator.
- Click on the
**Calculate Beam Size**button to get the beat spread.

## Generic Beam Spread Calculator by SEAL

**Generic Beam Spread Calculator** is a free tool offered by Stage Equipment and Lighting website. It is a simple tool that can help you estimate the size of a beam at a distance. The tool is quite simple to use where you can type the angle at which the beam is inclined along with the distance between the light source and the spread area. Based on the data, it instantly shows you the beam spread area of the light.

### How to calculate light beam spread on this website?

- Go to this calculator using the link given below.
- Enter the beam angle in the first text box.
- Then enter the distance between the light source and the surface.
- It shows you the beam spread area instantly.

## Beam Calculator by Grand Stage

**Beam Calculator** by Grand Stage is another free online light beam spread calculator. This is a simple calculator with three data fields; Beam Spread (Degrees), Diameter (Feet), and Throw Distance (Feet). The actual name might be confusing but you can use the measurement units to know what term is what. So, the Diameter is what we are calculating here. To do that, you have to enter the beam angle and the distance. When you do that, it gives you the value of the diameter of the light spread on the surface.

### How to calculate light beam spread on this website?

- Use the given below to access this online beam calculator.
- Enter the beam angle in the
**Beam Spread**field. - Then enter the distance between the light source and the surface in the
**Throw Distance**field. - Leave the
**Diameter**field empty and click on the**Submit**button. - This gives you the beam spread value in the
**Diameter**field.

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