DPI Calculator
Compute display DPI from pixel width, pixel height, and diagonal inches — diagonal pixels over diagonal size. Compare phone and laptop sharpness honestly — free, runs locally.
How to Use the DPI Calculator
Similar Tools You Might Need
See allPPI Calculator
Compute screen pixel density from resolution and diagonal size — compare phone sharpness honestly. A 1080p 6-inch display gives ~367 PPI — free, runs locally.
Screen Size Calculator
Convert screen sizes between inches, cm, resolution, and aspect — compare displays honestly. Check a 27-inch 4K pixel density — free, local, no signup.
Rectangle Area Calculator
Compute rectangle area and perimeter from length and width — flooring, paint, fencing estimates. A 12×15 ft room needs 180 sq ft of flooring — free, runs locally.
Image Resizer
Scale one image to exact pixel dimensions — width/height fields prefill from the source — with optional aspect-ratio lock, PNG/JPEG/WebP output picker, and quality control for JPEG/WebP. Files over 50MB are rejected; resizing runs on plain canvas drawImage locally.
Chart Maker
Build bar, line, pie, doughnut, area, and horizontal-bar charts from a label/value table (minimum 2 rows) with 10 ten-color palettes, title/axis labels, background, and labels/legend toggles. Canvas renders at device-pixel-ratio sharpness, width 400–2000px, height 300–1200px — exports PNG named after your title.
Frequently Asked Questions
What does the number mean?
Diagonal pixels divided by diagonal inches — a 2560×1600 13.3in panel reads about 227. Higher means sharper; compare candidates here instead of trusting marketing numbers.
Can it check an 8×10 print enlargement?
No — there are no print-size inputs here. For print math, divide pixels by print inches by hand: 3000px across 10 inches equals exactly 300 DPI.
DPI vs PPI — different?
This tool computes diagonal display density — the same √(w²+h²) ÷ inches formula both names use. Enter resolution with diagonal inches either way.
Are my print specs uploaded anywhere?
No — computation runs locally in your browser. Nothing leaves your device.
Related Calculator Tools
PPI Calculator
Compute screen pixel density from resolution and diagonal size — compare phone sharpness honestly. A 1080p 6-inch display gives ~367 PPI — free, runs locally.
Screen Size Calculator
Convert screen sizes between inches, cm, resolution, and aspect — compare displays honestly. Check a 27-inch 4K pixel density — free, local, no signup.
Last updated October 2026