A4 paper is 210 × 297 mm. It has an area of 1/16 square metres.
It is one of a series of paper sizes starting with A0, which has an area of 1 square metre.
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The most common size of copy paper, notebook paper, and typing paper in the US is 8½ inches wide by 11 inches high. In many other countries, A4 is the most common size of paper; A4 paper is 8.3 inches wide by 11.7 inches tall.
210 × 297 mm. A4 is the standard size for most countries, excluding the US, Canada and a few others.A4 is one of a series of paper sizes, starting with A0. A0 has an area of 1 m². If you fold A0 into two you get A1, and so on.All sizes in the A-series have the same ratio of length/width, which is the square root of 2.
Approx...400reams Paper quality is expressed as weight per area. Office standard A4 is 80 grams per square metre. A sheet of A0 paper has an area of 1 m2, A1 is half the size of A0, A2 half A1, A3 half A2, and A4 half of A3; so there are 16 sheets of A4 to the square metre. Therefore the weight of one sheet of A4 is 80 divided by 16, which is 5 grams. The number of sheets needed to make one kilogram is 1000 divided by 5, which is 200 sheets. One tonne is 1000 kilograms so one tonne of A4 would need 200 000 sheets. A ream of paper is 500 sheets, so 200 000 sheets is 400 reams.
A4 is 210 mm by 297 mm.
The dimensions of A3 paper are 11.7 inches by 16.5 inches or 297 mm by 420 mm.