Aspect Ratio X is a rule-of-three calculator. Features – Calculate aspect ratios (rule of three) – Swap values horizontally and vertically – Select scales and ratios – Browse common resolutions – Browse recent ratios – Formula preview – Uses imperial or metric system automatically based on your system settings – Multi-window support – Optimized for macOS 11 (Big Sur) and macOS 12 (Monterey) – Optimized for Mac with M1, M1 Pro and M1 Max (Apple Silicon) An app ahead: If you like the app, please take a moment to rate it on the Mac App Store. That’s a great way to support indie developers like me. If you need help or want to make a feature suggestion, reach out any time: firstname.lastname@example.org. I’d love hearing from you!