Screen Size Calculators

Free online tools to calculate screen sizes, pixel density, resolution, and aspect ratios for any display.

8 Calculators
68+ Devices
100% Free

Screen Size Calculators

Compare display sizes and find the perfect screen for your setup

TV Screen Size Calculator

Calculate optimal viewing distance, compare TV sizes, and find the perfect screen for your room.

Viewing distance Size comparison Room optimization

Monitor Screen Size Calculator

Compare monitor sizes for gaming, productivity, and professional work. Find your ideal desktop display.

Gaming setups Multi-monitor Desk space planning

Phone Screen Size Calculator

Compare iPhone, Samsung, Pixel and other smartphone screen sizes side by side.

iPhone vs Android Hand comfort Display comparison

Tablet Screen Size Calculator

Compare iPad, Galaxy Tab, Surface and other tablet screen sizes. Find the perfect tablet for your needs.

iPad comparisons Productivity Portability check

Projector Screen Size Calculator

Calculate throw distance, screen size, and optimal projector placement for home theater.

Throw distance Screen sizing Room setup

Display Tools

Calculate pixel density, resolution, and aspect ratios

PPI & DPI Calculator

Calculate pixel density (PPI/DPI) for any display. Find if your screen is Retina-quality and compare sharpness.

Pixel density DPI calculation Sharpness comparison

Resolution Calculator

Scale resolutions, compare pixel counts, and calculate megapixels for any display.

Resolution scaling Pixel comparison Format conversion

Aspect Ratio Calculator

Calculate and convert aspect ratios. Find dimensions for 16:9, 21:9, 4:3 and custom ratios.

Ratio conversion Dimension finder Format matching

Choose a Calculator by Scenario

Start from your real usage situation, then jump to the best-fit tool and guide.

Living Room TV Setup

Start with sofa-to-TV distance, then validate whether you should buy 55", 65", or 75".

  • Enter viewing distance
  • Check recommended TV range
  • Open a size-vs-size comparison
Open TV calculator Distance Chart 55" vs 65" TV

Desk Monitor Planning

Choose monitor size by desk depth, work style, and whether you use single or dual displays.

  • Measure desk depth
  • Match use case to size
  • Validate with ratio and resolution
Open Monitor calculator Monitor Size Guide Aspect Ratio Calculator

Phone Size Decision

Compare hand feel, readability, and pocket comfort before choosing compact vs large phones.

  • Pick candidate models
  • Compare width/height side by side
  • Confirm readability and one-hand use
Open Phone calculator How to Measure Screen Size Compare Phones

Compare Screen Sizes

Use our comparison tools to see how different screens stack up against each other

Compare Phones Compare Tablets Compare Monitors Compare TVs Compare Projectors
View all comparisons

Frequently Asked Questions

What calculators are available on this site?

We offer 8 free calculators: TV, Monitor, Phone, Tablet, and Projector screen size calculators for comparing displays, plus PPI & DPI Calculator for pixel density, Resolution Calculator for scaling, and Aspect Ratio Calculator for dimension conversions.

Are these calculators free to use?

Yes, all calculators on this site are completely free with no registration required. Results are calculated instantly in your browser.

Which calculator should I use to compare screen sizes?

Use the device-specific calculators: TV Calculator for televisions, Monitor Calculator for computer displays, Phone Calculator for smartphones, Tablet Calculator for iPads and tablets, or Projector Calculator for projection screens. Each is optimized for its device category.

How accurate are the screen size calculations?

Our calculations use manufacturer specifications and industry-standard formulas. Screen dimensions are calculated from diagonal size and aspect ratio using the Pythagorean theorem, ensuring high accuracy for all supported devices.