In this awesome guide to projector Throw Ratio, I’ll share with you an amazing formula that not only help you choose the great projector but also save you money.
The projector throw ratio is a very simple formula that allows us to calculate the image width or throw distance even if we know what the measurements are.
The resolution also depends on the throw ratio. If you are sitting too close or too far from the screen, the image will pixelate. Besides, don’t go beyond the recommended throw ratio of the projector.
What Is The Projector Throw Ratio?
A projector throw ratio is the size of the image we can project from a certain distance away, or it is the relationship between distance and the width of the projected image.
The throw distance and the projected image size are proportional to each other based on the lens. If you increase the distance between the screen and the lens, the image will also increase.
You might also want to learn about the throw ratio, its details, and whether it is a normal throw vs. a long throw.
How To Calculate Throw Ratio
There is a standard formula for calculating the throw ratio. Even newbies can use it to calculate.
Distance (in/ft.)/width of the screen (in/ft.)
Divide the distance by the width of the screen. If the distance is 9.8 ft. and the width is 6.56 ft., then based on the above-mentioned formula, the result will be a 1.49 throw ratio.
9.8ft/6.56ft = 1.49 throw ratio
Projector Type And Their Throw Ratios
The above-mentioned calculation will help you to determine which type of projector you or your friend need, for example:
Projector type Throw Ratio
Ultra-short throw projector Less than <0.38
Short throw projector Between 0.38 to <0.76
Normal projector Above >1.1
Why Is The Throw Ratio Important?
When I used to live in the hostel, there wasn’t enough space to install high-end long throw projectors like JVC NX7 or SONY VPL models, but I didn’t know that. I bought an NX7, and its throw ratio did not allow me to cast a perfect image because there wasn’t much distance between the projector and the screen.
My roommate taught me how to calculate the projector throw ratio before purchasing any model. Since then, I have only used either short-throw or ultra-short projectors.
It is extremely important to know the throw ratio; otherwise, you will be cramped with space. This is more important for a home theater.
Uses For Short Throw And Ultrashort Projectors
There are some special situations where you would need short-throw/ultra-short projectors. Those situations are:
- Small home theaters
- Tight conference rooms
- Classrooms (Small)
- Presentations
- Churches
We have covered top short-throw and ultra-short-throw projectors for gaming, outdoor, and movies in your buying guides; check them for a better understanding.
Projector Throw Ratio Calculation Tool
If your projector has a zoom lens, you can change the size of the image, but the distance will remain constant. Each lens is different, so you will need an online projection calculator tool.
We use the EPSON throw distance calculator for accurate results.
Projection Distance
The distance between the projector and the screen determines the size of the image. Normally, images increase with the increasing distance, but that also depends on the zoom, aspect ratio, resolution, and other factors.
Use the Following Tables to Determine the Projection Distance
16:10 Aspect Ratio
| Image Size | Projection Distance |
|---|---|
| 78 – 80 inches | 95 – 105 inches |
| 100 – 102 inches | 120 – 130 inches |
| 115 – 120 inches | 145 – 160 inches |
| 145 – 150 inches | 180 – 200 inches |
4:3 Aspect Ratio
| Image Size | Projection Distance |
|---|---|
| 78 – 80 inches | 110 – 120 inches |
| 105 – 110 inches | 135 – 150 inches |
| 115 – 120 inches | 165 – 180 inches |
| 150 inches | 208 – 227 inches |
16:9 Aspect Ratio
| Image Size | Projection Distance |
|---|---|
| 78 – 80 inches | 100 – 110 inches |
| 95 – 100 inches | 125 – 135 inches |
| 115 – 120 inches | 150 – 165 inches |
| 145 – 150 inches | 189 – 205 inches |
Related: Projector Contrast Ratio Explained
