Skip to content

DPI Calculator

Calculate DPI from resolution and screen size. Pixels per inch. For display and print. Free design tool with instant browser-based results — no account, works

Use this result well

Inputs that matter
Width (px), Height (px), Diagonal (inches)
Output to expect
DPI Calculator
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
Was this tool helpful?

Projects using DPI Calculator

This tool is part of these guided projects. Each project provides step-by-step instructions with checklists and all the tools you need in one place.

Portfolio Publication Decision Record

Coordinate one portfolio release candidate through authorship, client/privacy, content and user needs, bounded visual/media scenarios, accessible implementation, representative testing, and named acceptance.

6 steps15 toolsStart project

Related Tools

Tools you might need next

Layout Aspect Ratio Calculator

Calculate video aspect ratio dimensions from width or height. Convert 16:9, 4:3, 2.35:1 cinema, and vertical 9:16 for social media and broadcast formats.

Layout
Image Dimension Planner

Calculate whole-pixel image dimensions with a locked ratio or independent width and height, then compare scale and pixel area before exporting in an editor.

Layout
Pixel to Percentage Converter

Convert pixels to percentage of container. For responsive layout. Flex and grid. Free design tool with instant browser-based results — no account, works on

Layout

Reference & details

How it works

Color Space Conversion

The DPI Calculator converts between RGB, HSL, HSV, and hex using standard linear transforms. Gamma-correct sRGB values are assumed unless otherwise noted.

HSL ↔ RGB via standard cylindrical transform

Accessibility Checks

Contrast ratios are computed per WCAG 2.1 relative luminance formula. Results indicate AA and AAA compliance for normal and large text.

Contrast = (L1 + 0.05) / (L2 + 0.05)

Output Formatting

Generated values are emitted in copy-ready formats (hex, CSS, Tailwind, SVG). Precision is tuned for design tools without unnecessary floating-point noise.

Updated: July 2026

Example Scenarios

A UI designer uses the DPI Calculator to explore complementary colors and verify WCAG contrast before handing specs to developers.

A front-end developer checks spacing, ratio, or typography values with the DPI Calculator while implementing a Figma mockup in CSS.

A freelancer generates live examples with the DPI Calculator during a client call to agree on visual direction without switching tools.

FAQ

Yes, all processing happens in your browser. No data is sent to any server — your input stays on your device and is never stored or logged.

Yes, it's completely free with no registration required. Use the DPI Calculator as often as you need with no limits, accounts, or subscriptions.

Once loaded, the tool runs entirely in your browser without needing a constant connection. Your data is processed locally for speed and privacy.

Color-related tools compute WCAG contrast ratios when foreground and background colors are provided. Aim for AA (4.5:1 normal text) or AAA (7:1) for body copy on public-facing sites.

The DPI Calculator uses established formulas and reference data for this domain. Results are computed with standard floating-point precision and rounded for readability. Always verify critical values against primary sources or a qualified professional.

About DPI Calculator

Use our free DPI Calculator for fast, accurate results in your browser. No signup or installation required — works on any device.