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Projector Distance Calculator
A projector is defined by its throw ratio, the distance divided by screen width, so a ratio of 1.5 means the projector sits one and a half screen widths back. That single number tells you whether a room is long enough before you buy anything.
How it works
Throw ratio
Desired screen width
Screen aspect ratio
Available room length
Throw distance needed
Screen height
Screen diagonal
Screen area
Widest screen this room allows
Room suitability
Frequently asked questions
How do I use the Projector Distance Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.