Here is a quick list of what level your creature/character would be at by their number of posts (The ~'s are simply to separate the info into a table like form as just spaces won't work). A character's first post is post one, not zero. A character that has never posted is at level one with zero posts.
# of Posts~~Level
0-4~~~~~1
5-9~~~~~2
10-14~~~~3
15-19~~~~4
20-24~~~~5
25-29~~~~6
30-34~~~~7
35-39~~~~8
40-44~~~~9
45-49~~~10
50-54~~~11
55-59~~~12
60-64~~~13
65-69~~~14
70-74~~~15
75-79~~~16
80-84~~~17
85-89~~~18
90-94~~~19
95-99~~~20
100-104~~21
105-109~~22
110-114~~23
115-119~~24
120-124~~25
125-129~~26
130-134~~27
135-139~~28
140-144~~29
145-149~~30
150-154~~31
155-159~~32
160-164~~33
165-169~~34
170-174~~35
175-179~~36
180-184~~37
185-189~~38
190-194~~39
195-199~~40
200-204~~41
205-209~~42
210-214~~43
215-219~~44
220-224~~45
225-229~~46
230-234~~47
235-239~~48
240-244~~49
245-249~~50
250-254~~51
255-259~~52
260-264~~53
265-269~~54
270-274~~55
275-279~~56
280-284~~57
285-289~~58
290-294~~59
295-299~~60
300-304~~61
305-309~~62
310-314~~63
315-319~~64
320-324~~65
325-329~~66
330-334~~67
335-339~~68
340-344~~69
345-349~~70
0-4~~~~~1
5-9~~~~~2
10-14~~~~3
15-19~~~~4
20-24~~~~5
25-29~~~~6
30-34~~~~7
35-39~~~~8
40-44~~~~9
45-49~~~10
50-54~~~11
55-59~~~12
60-64~~~13
65-69~~~14
70-74~~~15
75-79~~~16
80-84~~~17
85-89~~~18
90-94~~~19
95-99~~~20
100-104~~21
105-109~~22
110-114~~23
115-119~~24
120-124~~25
125-129~~26
130-134~~27
135-139~~28
140-144~~29
145-149~~30
150-154~~31
155-159~~32
160-164~~33
165-169~~34
170-174~~35
175-179~~36
180-184~~37
185-189~~38
190-194~~39
195-199~~40
200-204~~41
205-209~~42
210-214~~43
215-219~~44
220-224~~45
225-229~~46
230-234~~47
235-239~~48
240-244~~49
245-249~~50
250-254~~51
255-259~~52
260-264~~53
265-269~~54
270-274~~55
275-279~~56
280-284~~57
285-289~~58
290-294~~59
295-299~~60
300-304~~61
305-309~~62
310-314~~63
315-319~~64
320-324~~65
325-329~~66
330-334~~67
335-339~~68
340-344~~69
345-349~~70