Aspect Ratio Calculator

Aspect Ratio Calculator is a focused Mac utility for image dimensions, ratios, resize previews, and clean exports. Enter an original size and a new size, choose a ratio or exact frame, preview the result, then copy developer-friendly output or export a finished image. Use it for web assets, screenshots, social posts, product images, documentation, print-aware handoffs, and everyday sizing work. What you can do: - Calculate aspect ratios, decimal ratios, pixel counts, megapixels, and scale. - Inspect images by dragging, pasting, or choosing a file. - Resize images to exact dimensions. - Resize to Frame with Fit Inside, Fill & Crop, and Keep Scale. - Adjust source placement with anchors, drag controls, zoom, and a larger Frame Placement window. - Export PNG, JPG/JPEG, TIFF, HEIC, and HEIF when supported by macOS. - Preserve useful export names with source-based filename templates, including Save, Share, Copy Image, and Drag Image. - Copy CSS, HTML, Tailwind, Markdown, rendered image output, and custom Pro templates. - Organize custom ratios and saved copy formats into categories. - Use Quick Ratio from the menu bar for fast math, with optional launch at login. - Unlock Pro for custom ratios, custom copy templates, advanced units, iCloud settings sync, Blueprint Dark, and advanced resize/export workflows. - Unlock the optional Workspace Theme & Ratio Pack for branded workspace themes and curated exact-size presets. Aspect Ratio Calculator is built for designers, web designers, marketers, developers, and creators who need precise dimensions without opening a full image editor.