Transparent formulas
Every result includes the equation, units and assumptions used to produce it.
Practical dimension tools
Measure pixels in the real world.
Calculate screen dimensions, print sizes and image proportions with transparent formulas. Every tool runs locally in your browser.
55 in
Example: a 55-inch 16:9 display is about 47.94 × 26.96 inches.
Calculator library
Eight focused calculators
Each page solves one clear sizing problem, shows the formula and gives you useful reference values.
Screen size
Convert a screen diagonal and aspect ratio into exact width and height. Add resolution to calculate pixel density and pixel pitch.
Open calculator →Print size
Calculate the physical print size of an image from pixel dimensions and PPI, with practical quality guidance and paper-size comparisons.
Open calculator →Aspect ratio
Reduce width and height to an aspect ratio, upload an image locally, and calculate proportional dimensions, fit and crop sizes.
Open calculator →PPI
Calculate pixels per inch and pixel pitch from display resolution and diagonal size. Compare common monitor and phone densities.
Open calculator →Viewing distance
Calculate a recommended TV, monitor or projector viewing distance from screen size, aspect ratio and a chosen field of view.
Open calculator →Projector size
Calculate projector screen width, height, diagonal, throw distance and throw ratio for 16:9, 16:10, 4:3 or custom screens.
Open calculator →Pixels to cm
Convert pixels to centimeters, millimeters and inches using any PPI, or convert a physical measurement back into pixels.
Open calculator →Image size
Upload an image locally or enter its pixel dimensions to calculate aspect ratio, megapixels and print sizes at multiple PPI values.
Open calculator →Design principles
Built for answers you can verify
Private by default
Uploaded images are inspected inside your browser and are never sent to our servers.
Useful on any device
Fast static pages, keyboard-friendly forms and mobile layouts keep the tools practical.