So then activity is calculated by multiplying 14 by either my post count or number of days registered (which ever is lowest?)
Nope. See :
The activity number is determined in this way:
time = number of two-week periods in which you've posted since your registration
activity = min(time * 14, posts)
Rough summary of what this means: If you post once per day on average, then you will eventually get the maximum number of activity points that you can get. Posting more than once per day on average is useless for increasing activity. The maximum number of activity points you can get is 1 per day, but your activity score only updates every two weeks. Therefore, it will take about 100 days to get 100 activity if you post once per day on average.
I hope you understand what time is. Time is 2 week period, that is 14 days. You will only get maximum of 14 activity per 2 weeks(14 days) if you have made 14 or more posts. But if you have made less than 14 posts, for example 12, then when your activity updates, you will get 12 activity points. Here is the full list:
Know 'how many months/years it will take' (
Thanks to hilariousandco for his post):
1 X 14 = 14
2 X 14 = 28
3 X 14 = 42 -- Jr. Member ( 1.5 month)
4 X 14 = 56
5 X 14 = 70 -- Member (2.5 month)
6 X 14 = 84
7 X 14 = 98
8 X 14 = 112
9 X 14 = 126 -- Full Member (4.5 month)
10 X 14 = 140
11 X 14 = 154
12 X 14 = 168
13 X 14 = 182
14 X 14 = 196
15 X 14 = 210
16 X 14 = 224
17 X 14 = 238
18 X 14 = 252 -- Senior Member (8.5 month)
19 X 14 = 266
20 X 14 = 280
21 X 14 = 294
22 X 14 = 308
23 X 14 = 322
24 X 14 = 336
25 X 14 = 350
26 X 14 = 364
27 X 14 = 378
28 X 14 = 392
29 X 14 = 406
30 X 14 = 420
31 X 14 = 434
32 X 14 = 448
33 X 14 = 462
34 X 14 = 476
35 X 14 = 490 -- Hero Member (1.3 years)
36 X 14 = 504
37 X 14 = 518
38 X 14 = 532
39 X 14 = 536
40 X 14 = 550
41 X 14 = 564
42 X 14 = 578
43 X 14 = 592
44 X 14 = 606
45 X 14 = 620
46 X 14 = 634
47 X 14 = 648
48 X 14 = 662
49 X 14 = 676
50 X 14 = 690
51 X 14 = 704
52 X 14 = 718
53 X 14 = 732
54 X 14 = 746
55 X 14 = 760
56 X 14 = 784 -- Legendary lucky rank starts (2 years)
57 X 14 = 798
58 X 14 = 812
59 X 14 = 826
60 X 14 = 840
61 X 14 = 854
62 X 14 = 868
63 X 14 = 882
64 X 14 = 896
65 X 14 = 910
66 X 14 = 924
67 X 14 = 938
68 X 14 = 952
69 X 14 = 966
70 X 14 = 980
71 X 14 = 994
72 X 14 = 1008
73 X 14 = 1022
74 X 14 = 1036
75 X 14 = 1050
76 X 14 = 1064
77 X 14 = 1078
77 X 14 = 1092 -- Not achieved yet, wait for this update -> Legendary rank achieved! (3 years)
-MZ