Projector Calculator
Calculate projector placement distance or screen size based on throw ratio. Essential for planning home theater and presentation setups.
Distance:Width ratio (check projector specs)
How to Use This Calculator
- Enter your projector\'s throw ratio (found in specifications, typically 1.0-2.5:1).
- Enter either your desired screen width OR the available distance from projector to screen.
- The calculator displays the required distance (if you entered width) or maximum screen width (if you entered distance).
- Use this to plan your projector placement and screen size for optimal viewing.
Throw Ratio Formula
Throw ratio relates projection distance to screen width:
Distance = Throw Ratio × Screen Width
Screen Width = Distance ÷ Throw Ratio
Example: A projector with 1.5:1 throw ratio projecting onto a 100" screen: Distance = 1.5 × 100 = 150 inches (12.5 feet) from the screen.
Full Description
Planning a projector setup requires understanding throw ratio—the relationship between projection distance and screen size. This calculator helps you determine exactly where to place your projector or what size screen you can use, ensuring optimal image quality and viewing experience.
Throw ratio varies by projector model and is determined by the lens design. Short throw projectors (ratios below 1.0) can create large images from very close distances, making them ideal for small rooms or situations where you want to avoid shadows. Long throw projectors (ratios above 2.0) require more distance but offer flexibility in placement. Most projectors have standard throw ratios between 1.0 and 2.0.
Use this calculator during the planning phase of your home theater or presentation setup. Enter your projector\'s throw ratio (found in specifications) and either your desired screen size or available distance, and the calculator tells you the other value. This ensures your projector is positioned correctly for the best image quality and prevents placement mistakes that could require repositioning later.
Frequently Asked Questions
What is throw ratio?
Throw ratio is the ratio of projection distance to screen width. A 1.5:1 throw ratio means the projector must be 1.5 times the screen width away. Short throw projectors have ratios below 1.0, while long throw projectors have ratios above 2.0.
How do I find my projector's throw ratio?
Check your projector's specifications or manual. Throw ratio is usually listed in the technical specs. Some projectors have variable throw ratios (zoom lenses), so you may see a range like 1.2-1.8:1.
What's the difference between short throw and long throw?
Short throw projectors (ratio < 1.0) can project large images from close distances, ideal for small rooms. Long throw projectors (ratio > 2.0) need more distance but offer more placement flexibility. Standard throw (1.0-2.0) is most common.
Can I use this for ceiling-mounted projectors?
Yes! The distance calculation works the same whether the projector is on a table or ceiling-mounted. Just measure the distance from the projector lens to the screen surface, regardless of mounting position.