I needed to convert Plato to Specific Gravity today so I found this converter online with the formula and table. Looking at a few minutes I realized that if you take the specific gravity say 1.048 and divide the 48 by four you get plato 12 which is correct. Likewise 10 Plato * 4 = 1.040. I did not know that' did all y'all? I'm sure this is not new but it's nice to be able to do things quickly in your noggin. Seems easier than the complicated formula below and works in the normal ranges.

{Plato/(258.6-([Plato/258.2]*227.1)}+1 = Specific gravity
Plato Gravity
1 1.004
2 1.008
3 1.012
4 1.016
5 1.020
6 1.024
7 1.028
8 1.032
9 1.036
10 1.040
11 1.044
12 1.048
13 1.053
14 1.057
15 1.061
16 1.065
17 1.070
18 1.074
19 1.079
20 1.083
21 1.087
22 1.092
23 1.096
24 1.101
25 1.106
26 1.110
27 1.115
28 1.120
29 1.124
30 1.129
31 1.134
32 1.139
33 1.144
34 1.149
35 1.154
36 1.159
37 1.164
38 1.169
39 1.174
40 1.179
41 1.184
42 1.189
43 1.195
44 1.200
45 1.205
46 1.211
47 1.216
48 1.222
49 1.227
50 1.233
51 1.239
52 1.244
53 1.250
54 1.256
55 1.262
56 1.268
57 1.273
58 1.279
59 1.285
60 1.292
61 1.298
62 1.304
63 1.310
64 1.316
65 1.323
66 1.329
67 1.336
68 1.342
69 1.349
70 1.355
71 1.362
72 1.369
73 1.376
74 1.382
75 1.389
76 1.396
77 1.403
78 1.411
79 1.418
80 1.425
81 1.432
82 1.440
83 1.447
84 1.455
85 1.462
86 1.470
87 1.478
88 1.486
89 1.494
90 1.502
91 1.510
92 1.518
93 1.526
94 1.534
95 1.543
96 1.551
97 1.560
98 1.568
99 1.577