A-series paper size calculator

	B	C	D	F	G
1
2	Tell me the dimensions of			Aspect ratio	1.414213562
3	A	4		Area of A0 (mm2)	1,000,000
4				Conversion constant	2
5		mm	cm	Reference
6	Long side	297	29.7	Sizes
7	Short side	210	21.0
8
9	1/2 long side	149	14.9
10	1/3 long side	99	9.9
11	2/3 long side	198	19.8
12
13	This calculator uses the proportionality of A-series paper to calculate a sheet's dimensions. A-series paper has two constants: the aspect ratio (the square root of 2) and the area of a sheet of A0 paper (1 metre squared). As the number of the size increases by 1, the area of the sheet is halved, so the formula divides the area of an A0 sheet by 2 to the power of the number of the size. So we can calculate the dimensions of any numbered size of A-series paper purely using a formula to perform the calculation, without storing any values except those shown. Just click on a cell to see the formula for that dimension.
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100