Projector Screen Size Calculator

Calculate exact projector placement distance and throw ratio for your home theater. Get instant throw distance, minimum wall width, and screen size recommendations for any projector.

Throw Ratio Calculator Wall Width Requirements All Projector Types

Projector Calculator

Calculate throw distance & screen size

Width

87.16in

Height

49.03in

PPI

44

Area

4,273in²

Pixels

8.3MP

Pitch

0.58mm

Throw Distance

130.74 in

≈ 10.9 ft

Min Wall Width

104.59 in

Projector should be placed 130.74 in from the screen

Screen Visualization

How to Calculate Throw Distance

1

Enter Screen Size

Input your desired projection screen size (diagonal measurement in inches or cm). The calculator will show the screen width.

2

Select Throw Ratio

Choose your projector's throw ratio from the dropdown (0.5 for ultra short throw, 1.5 for standard, 2.0+ for long throw).

3

Get Throw Distance

The calculator instantly shows the exact distance to place your projector from the screen or wall.

4

Check Wall Width

See minimum wall width required (includes 10% margin) to ensure the projection fits your space.

Projector Throw Ratio Guide

Projector Type Throw Ratio 100" Screen Distance Best For
Ultra Short Throw 0.25 - 0.5 8" - 20" Small rooms, living rooms
Short Throw 0.5 - 1.2 3' - 8' Apartments, medium rooms
Standard Throw 1.2 - 2.0 8' - 16' Home theaters, large rooms
Long Throw 2.0 - 5.0+ 16' - 40'+ Auditoriums, large venues

Projector Recommendations by Use Case

Different projection needs require different setups. Find the ideal configuration for your specific scenario.

Home Theater Enthusiasts

Movie buffs & cinema lovers

  • 100-150 inch screen for true cinema feel
  • 4K laser projector for best image quality
  • Dedicated dark room for optimal contrast
  • Acoustic transparent screen for center speaker

Pro Tip: Invest in a motorized screen that retracts when not in use. ALR (Ambient Light Rejecting) screens help if your room isn't fully dark.

Business Presentations

Meeting rooms & conference spaces

  • 80-120 inch based on room size
  • 3000+ lumens for lit rooms
  • Short throw for limited space
  • Wireless connectivity for easy setup

Pro Tip: Choose a projector with built-in apps and wireless casting. Interactive projectors work great for collaborative meetings and brainstorming.

Outdoor Movie Nights

Backyard cinema & events

  • 100-150 inch inflatable or portable screen
  • 4000+ lumens for dusk viewing
  • Portable design with carrying case
  • Built-in speakers or Bluetooth audio

Pro Tip: Wait until after sunset for best image quality. Battery-powered projectors offer cord-free flexibility for truly portable outdoor setups.

Throw Distance Quick Reference

Screen Size Ultra Short (0.4) Short (0.8) Standard (1.5) Long (2.0)
80" (70" wide) 2.3 ft 4.7 ft 8.8 ft 11.7 ft
100" (87" wide) 2.9 ft 5.8 ft 10.9 ft 14.5 ft
120" (105" wide) 3.5 ft 7.0 ft 13.1 ft 17.5 ft
150" (131" wide) 4.4 ft 8.7 ft 16.4 ft 21.8 ft
200" (174" wide) 5.8 ft 11.6 ft 21.8 ft 29.0 ft

Frequently Asked Questions

How do I calculate projector throw distance?
Use the formula: Throw Distance = Screen Width × Throw Ratio. For example, a 100-inch diagonal 16:9 screen (87 inches wide) with a 1.5 throw ratio projector needs: 87 × 1.5 = 130.5 inches (10.9 feet) throw distance.
What is a good throw ratio for a projector?
Standard throw ratio (1.5-1.8) is most versatile for home theaters. Ultra short throw (0.25-0.5) is best for small rooms. Short throw (0.8-1.2) balances flexibility and price. Long throw (2.0+) is for large venues.
How far should a projector be from a 120 inch screen?
For a 120 inch screen (105 inches wide), placement distance depends on throw ratio: Ultra short throw (0.4): 3.5 feet, Short throw (0.8): 7.0 feet, Standard (1.5): 13.1 feet, Long throw (2.0): 17.5 feet.
What's the difference between short throw and ultra short throw projectors?
Ultra short throw (UST) projectors have 0.25-0.5 throw ratio and sit 8-20 inches from screen, ideal for tight spaces. Short throw projectors have 0.8-1.2 ratio and need 3-8 feet distance, offering better value than UST with good flexibility.
What screen size is best for home theater?
For home theaters, 100-120 inch screens are the most popular choice. A 100 inch screen works well for rooms 10-12 feet deep, while 120+ inches is ideal for dedicated home theater rooms with 12-15+ feet seating distance. Consider wall width and ceiling height when choosing.
Can I project on a wall instead of a screen?
Yes, but image quality will be lower than a dedicated screen. White or light gray walls work best. For optimal results, use projector screen paint (gain 1.0-1.3) on a smooth wall. A proper screen provides better contrast, color accuracy, and viewing angles.
How do I choose between ceiling mount and table placement?
Ceiling mounting keeps the projector out of the way and provides a cleaner setup, but requires professional installation. Table or shelf placement is easier to set up and adjust but may obstruct viewing paths. Consider lens shift capability for flexibility in either setup.
What lumens do I need for my projector?
For dark home theaters: 1,500-2,500 lumens. For rooms with some ambient light: 2,500-3,500 lumens. For bright rooms or outdoor use: 3,500+ lumens. Larger screens require more lumens. A 100 inch screen in a dark room needs about 1,500 lumens; a 150 inch screen needs 3,000+ lumens.
What is lens shift and why does it matter?
Lens shift allows you to move the projected image up, down, left, or right without moving the projector itself. This provides flexibility in projector placement without causing image distortion (keystone). Vertical lens shift is common; horizontal lens shift is found on higher-end models.

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