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
Specialist tool for Layout1 documented formula1 guided projectPrivate in your browser
Use this result well
A quick decision brief for this specific tool
Inputs that matter
Width (px), Height (px), Diagonal (inches)
Output to expect
DPI Calculator
How it works
1 documented formula across 1 calculation mode
- Confirm that every value uses the unit and time basis shown before comparing scenarios.
- Change one input at a time to see which assumption materially changes the result.
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.
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 Resize Calculator
Calculate new dimensions when resizing image. Maintain aspect ratio. For responsive images. Free design tool with instant browser-based results — no account
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
Updated July 2026
How it works
Updated July 2026Color 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 transformAccessibility 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.