Useful Engineering Conversions for Fan Size

Use the chart below to convert sizes between metric (mm) and imperial (inches) systems.

mm	Inches
254 x 89	10.0 x 3.50
172 x 150 x 51	6.77 x 5.91 x 2.01
172 x 150 x 38	6.77 x 5.91 x 1.50
120 x 120 x 38	4.72 x 4.72 x 1.50
120 x 120 x 32	4.72 x 4.72 x 1.26
120 x 120 x 25	4.72 x 4.72 x 0.98
92 x 92 x 25	3.62 x 3.62 x 0.98
80 x 80 x 38	3.15 x 3.15 x 1.50
80 x 80 x 25	3.15 x 3.15 x 0.98
80 x 80 x 15	3.15 x 3.15 x 0.60
70 x 70 x 25	2.76 x 2.76 x 0.98
60 x 60 x 25	2.36 x 2.36 x 0.98
60 x 60 x 20	2.36 x 2.36 x 0.79
60 x 60 x 10	2.36 x 2.36 x 0.39
50 x 50 x 15	1.97 x 1.97 x 0.60
50 x 50 x 10	1.97 x 1.97 x 0.39
40 x 40 x 20	1.57 x 1.57 x 0.79
40 x 40 x 10	1.57 x 1.57 x 0.39
30 x 30 x 10	1.18 x 1.18 x 0.39
25 x 25 x 10	0.98 x 0.98 x 0.39