Aspect Ratio Pro is a Rule of Three calculator. It’s handy for calculating aspect ratios and scaling.

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)

Compatibility: macOS 11.0 or later
Homepage: https://apps.apple.com/rs/developer/app-ahead-gmbh/id955848754