Projector Throw Distance Calculator
Work out how far from the screen a projector must sit for the picture size you want, from its throw ratio. Free, private and instant.
Where to buy
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How to use the Projector Throw Distance Calculator
- Enter your values in the fields above.
- The result updates automatically as you type.
- Copy or note the figures you need.
About this tool
A projector's throw ratio is the distance to the screen divided by the picture width. Enter the throw ratio (or the near and far ratios of a zoom lens), the screen diagonal and aspect ratio, and the calculator gives the distance range. Or enter the room depth to see the largest picture it can make. Use the throw ratio printed in the projector's specifications.
Projector Throw Distance Calculator is part of ToolStack Hub's Calculators. It runs entirely in your browser, which keeps your data private and makes results instant. There is nothing to install, no account to create and no usage limit.
Frequently asked questions
What is throw ratio?
The projection distance divided by the width of the picture. A ratio of 1.5 means a 2 m wide picture needs the projector 3 m from the screen.
What if my room is short?
Choose a short-throw projector (throw ratio under about 1) or a smaller picture. Ultra-short-throw models sit just centimetres from the wall.
Is the Projector Throw Distance Calculator free?
Yes. Projector Throw Distance Calculator is completely free with no sign-up, limits or watermarks.
Is my data private when I use the Projector Throw Distance Calculator?
Yes. It runs in your browser, so your input is not uploaded to our servers.
Does it work on mobile?
Yes. ToolStack Hub tools work on phones, tablets and desktop browsers.
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