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Paper Size Converter

A4 in inches8.27 × 11.69 in
Millimeters
210 × 297 mm
Centimeters
21 × 29.7 cm
Points (1/72 in)
595 × 842 pt
Pixels at 300 DPI
2,480 × 3,508 px

A-series sheets keep a 1 : √2 ratio, so halving a sheet gives the next size down. US Letter (8.5 × 11 in) is slightly wider and shorter than A4.

Look up any standard paper size in inches, millimeters, centimeters, points and pixels — for example, A4 in inches or US Letter in mm.

How to use the Paper Size Converter

  1. Choose the paper size.
  2. Set the DPI if you need pixel dimensions.
  3. Read the size in every unit.

How it works

International A sizes (ISO 216) are based on A0, a sheet of one square meter with sides in the ratio 1 : √2; each smaller size is half the previous one, so A4 is 210 × 297 mm. North America uses US Letter (8.5 × 11 in), Legal (8.5 × 14 in) and Tabloid (11 × 17 in). Points are 1/72 inch, the unit used by PDF and print software.

Paper sizes

SizemmInches
A3297 × 42011.69 × 16.54
A4210 × 2978.27 × 11.69
A5148 × 2105.83 × 8.27
Letter215.9 × 279.48.5 × 11
Legal215.9 × 355.68.5 × 14
Tabloid279.4 × 431.811 × 17

Frequently asked questions

What is A4 size in inches?

8.27 × 11.69 inches.

Is A4 the same as Letter?

No — A4 is narrower and taller (210 × 297 mm vs 216 × 279 mm).

What size is A5?

148 × 210 mm, or 5.83 × 8.27 inches — half of A4.

How many pixels is A4 at 300 DPI?

2480 × 3508 pixels.

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