Size Calculators & Conversion Tools

Calculate, convert and compare everyday sizes with practical tools for screens, images, paper, clothing, shoes and beds.

A-Size helps you move beyond basic dimension tables. Enter your own measurements, compare sizes visually and find the format that works for your project.

Calculate, convert and compare
View all size tools →
Screen tool Screen Size Calculator Calculate the width, height and area of any TV, monitor or display. Compare two screen sizes visually and see the difference to scale. Calculate screen size → Image and print tool Print Size Calculator Convert image pixels and PPI into a physical print size, or calculate the pixels required for a specific print format. Calculate print size → Paper and pixels Paper Sizes in Pixels Select A4, A3, Letter or another paper format and find its dimensions at different PPI resolutions. Convert paper to pixels → Clothing sizes Clothing Size Converter Compare common clothing sizes between US, UK, EU and international sizing systems. Convert clothing sizes → Shoe sizes Shoe Size Converter Convert men’s and women’s shoe sizes between European, UK and US sizing systems. Convert shoe sizes → Beds and mattresses Bed Size Comparison Compare Twin, Double, Queen and King mattress dimensions across different countries. Compare bed sizes →
Understand the difference

Compare Sizes Visually

Knowing the numbers is useful, but it does not always show how large something really is. Our visual tools draw sizes to scale, making it easier to compare two screens, understand a print format or choose between physical dimensions.

Compare Screen Size →

Reference library and tools

Paper & Print Sizes

Browse all paper sizes →

A-Size began as a paper-size reference, and the complete collection remains available. Find dimensions for international and North American formats in millimeters, centimeters, inches and pixels.

A-SeriesA0 through A10 B-SeriesB0 through B10 US & CanadaLetter, Legal and Tabloid Paper Size ChartDimensions at a glance Compare FormatsVisual paper comparison Printer PaperCommon printing formats
Everyday size guides

Clothing, Shoes and Beds

Size labels do not always mean the same thing across countries and manufacturers. Use our guides to compare common systems and understand how similarly named sizes differ.

International Clothing Sizes Compare US, UK, EU and international sizes → US, UK and EU Shoe Sizes Find corresponding men’s and women’s sizes → Bed & Mattress Sizes Compare regional bed dimensions →

About A-Size

A-Size.com is a collection of visual calculators, converters and reference guides for real-world sizes and dimensions. Our goal is simple: help you calculate, convert, compare and understand size.