About Pixcs

Editing a photo is full of small numbers that catch people out. Resize an image and the height has to move with the width or it looks squashed. Send a file to print and suddenly it’s pixels-per-inch, not pixels. Crop for a square feed and something important slides off the edge. None of it is hard maths — but it’s fiddly, easy to get wrong, and rarely laid out plainly. Pixcs exists to do that arithmetic for you and explain what it means.

Each calculator answers one concrete question. The Image Resize Calculator scales an image to a new width, height, or percentage while keeping its proportions. The Aspect Ratio Calculator reduces any size to a clean ratio like 16:9 and solves for a missing side. The DPI & Print Size Calculator turns pixels into a print size and back. The Megapixels & Resolution Calculatorrelates dimensions to a camera’s megapixels. The Image File Size Estimator predicts how heavy a JPEG, PNG, or WebP will be, and the Crop & Fit Calculator works out the largest centred crop and the bars needed to fit an image to a new ratio.

Around the calculators, the blog and learn section dig into resolution and pixels, file formats and compression, colour, and the basics of editing software, and the Imaging & Photography Museumis a browsable collection of the cameras and sensors, the formats and colour systems, the software and techniques, and the printing and display behind every image — with every entry, image, and fact drawn from Wikipedia and Wikimedia Commons.

A few things worth stating plainly. Pixcs is independent, and not affiliated with any camera maker, software vendor, or print lab. It is supported by advertising, which is how the calculators stay free and account-free. Every figure a tool produces is an educational estimate built from the numbers you enter and standard formulas — the file-size figures in particular are ballparks, because real compression depends on the image. For work that has to be exact, check the result in your own editor. If a tool looks wrong, or you can think of one that belongs here, the contact page is where to tell us.