Proportio
FreeCalculate and visualize proportions perfectly
AI Summary
Proportio is a web-based tool for calculating and visualizing proportions and ratios. It is designed for designers, architects and developers who need precise proportional relationships for their projects. The application enables quick calculations and visual representations of geometric ratios.
✓ Pros
- + Free and directly usable in the browser
- + Intuitive visualization of proportions and ratios
- + Fast and precise mathematical calculations
✗ Cons
- − Limited export options for project files
- − No offline functionality or desktop version
Use Cases
- → Calculating golden ratios for design projects
- → Creating scalable UI components and spacing systems
- → Planning architectural proportions and scales
- → Typographic scaling ratios for harmonious font sizes
Who is it for?
Designers, developers and architects who want to precisely calculate and visualize proportional relationships.
Tags
What is Proportio?
Proportio is a web-based calculation tool that computes geometric proportions and ratios and visualises them directly in the browser. The application is aimed at anyone working with precise proportional relationships: from the UI designer building a consistent spacing system to the architect planning scales. Getting started is free, and no installation is required.
Core features
- Golden ratio and classic proportions: Proportio calculates typical geometric ratios based on entered values, including the golden ratio.
- Visual representation: Calculated proportions are displayed graphically, so relationships can be read off directly without having to interpret values manually.
- Typographic scales: The tool supports the calculation of scaling ratios for font sizes, simplifying the creation of harmonious typographic hierarchies.
- UI spacing systems: Developers and designers can derive spacing and component sizes from a base value, maintaining consistent ratios throughout.
- Fast calculations in the browser: There are no loading times from server-side processing. Results appear immediately.
Who is Proportio for?
The primary audience is product designers and frontend developers who build spacing systems or component sizes based on mathematical ratios. The tool is also useful for architects who need to check scales quickly in early planning stages. Anyone who needs complex project management or export functionality will hit limitations. Proportio is a tool for focused individual calculations, not a design system editor.
Context & alternatives
Proportio fills a small but concrete gap. Most design tools such as Figma or Sketch offer no dedicated proportion calculator with visual feedback. The closest counterparts are browser-based typographic scale calculators such as Type Scale, though these remain specialised for font sizes. Anyone focused on the golden ratio will find similar functionality in various ratio calculators. Proportio combines both in a single interface. The lack of offline support and the limited export options are real constraints for professional workflows where results need to be documented.
