Throw Ratio Calculator

Solve for throw distance, screen width, or throw ratio – enter any two values.

Formula: Throw Ratio = Throw Distance ÷ Screen Width | Leave one field blank to solve for it.

Throw Ratio (TR)

Throw Distance (m)

Screen Width (m)

Common Throw Ratios

Lens Type	Typical TR Range	Notes
Ultra-short throw (UST)	0.1 – 0.4	Mounted very close or on the screen
Short throw	0.4 – 1.0	Common in classrooms
Standard	1.0 – 2.5	General purpose, flexible placement
Long throw	2.5 – 8.0+	Large venues, rear projection

Always verify throw ratio specs from the manufacturer's datasheet for your specific lens.