PIXCS
The photo-editing numbers, made simple — free calculators for image resizing, aspect ratios, DPI and print size, megapixels, file size, and aspect-ratio cropping, plus plain-English guides to resolution, file formats, color, and the basics of editing software.
From resizing an image without distorting it and reading its aspect ratio to planning a print at the right DPI, counting megapixels, estimating a file’s weight, and cropping to fit, Pixcs pairs free hands-on calculators with plain-English guides and an illustrated museum of imaging. Understand the numbers behind editing photos.
Image & Photo-Editing Calculators
Free tools for the numbers behind editing images — resizing, aspect ratios, DPI and print size, megapixels, file size, and cropping to fit.
Image Resize Calculator
Resize while keeping the aspect ratio — set a new width and get the proportional height, or the reverse, or scale by a percentage
Aspect Ratio Calculator
Reduce a width and height to its simplest ratio like 16:9 with the GCD, or solve for a missing dimension at a target ratio
DPI / PPI & Print Size Calculator
Turn pixels into a print size in inches and centimetres at any DPI, or a target print size into the pixels you need
Megapixels & Resolution Calculator
Convert width × height into megapixels, or work back from a megapixel count and aspect ratio to pixel dimensions
Image File Size Estimator
Estimate a file's size from dimensions, colour depth, and format — raw bitmap plus a typical JPEG, PNG, or WebP figure
Crop & Aspect-Ratio Fit Calculator
From a source size and target ratio, get the largest centred crop, or the padded canvas and letterbox / pillarbox bars
Imaging & Photography Museum
Step into an illustrated museum of how images are made and edited — the cameras, lenses, and sensors that capture light, the file formats and colour systems that store it, the editing software and techniques that shape it, and the printing and display technologies that show it, each in its own gallery. Get to know the tools and ideas behind every photograph you edit.
Tour the museum →From the Journal
Fresh guides on resizing and cropping, resolution and DPI, file formats and compression, colour, and photo-editing technique, plus plain-language explainers on the software and the science behind a good edit.
The Artful Framework: Mastering Photo Composition Through Intentional Design
The Power of Visual Storytelling: Crafting Narratives That Capture Hearts and Minds
Understanding the Core Technologies Behind AI Photo Enhancement
The Artistry Behind Photo Editing: Transforming Moments into Masterpieces
The Art of Capturing Life Through Your Phone Lens: Mastering Mobile Photography
Unlocking Imagination Through Lens: A Deep Dive Into Creative Photography
Keep Learning
Plain-language explainers on resolution and pixels, aspect ratios, image file formats and compression, colour management, and the basics of editing software — everything you need to read the numbers behind editing photos with confidence.
Visit the Learn hub →