Paper Size Calculator — A-Series & Custom Sizes
Convert between A-series, imperial and custom paper sizes with area calculations.
How We Calculate This
This calculator converts between paper sizes and provides dimensions in millimetres, centimetres and inches.
Area = Width x Height in your chosen units. For multiple sheets, the total area is multiplied by the number of sheets.
A-series sizes (ISO 216)
- A0: 841 x 1189 mm (1 m²)
- A1: 594 x 841 mm
- A2: 420 x 594 mm
- A3: 297 x 420 mm
- A4: 210 x 297 mm
- A5: 148 x 210 mm
- A6: 105 x 148 mm
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates. Always verify quantities before purchasing materials.