Level	Fighter2 Kxp	Kxp on Board	Min Level	Max Level
1	0	0	1	1
2	2	2	1	1
3	4	4	1	2
4	8	8	1	3
5	16	16	2	4
6	32	32	3	5
7	64	64	4	6
8	125	128	5	7
9	250	250	5	8
10	500	256	6	8
11	750	500	6	9
12	1000	512	7	9
13	1250	750	7	10
14	1500	1000	7	11
15	1750	1024	8	11
16	2000	1250	8	12
17	2250	1500	8	13
18	2500	1750	8	14
19	2750	2000	8	15
20	3000	2048	9	15
21	3250	2250	9	16
22	3500	2500	9	17
23	3750	2750	9	18
24	4000	3000	9	19
25	4250	3250	9	20
26	4500	3500	9	21
27	4750	3750	9	22
28	5000	4000	9	23
29	5250	4096	10	23
30	5500	4250	10	24
31	5750	4500	10	25
32	6000	4750	10	26
33	6250	5000	10	27
34	6500	5250	10	28
35	6750	5500	10	29
36	7000	5750	10	30
+1	+250	+250 with 2^N interspersed	+ROUNDDOWN(LN(''Kxp on Board'')/LN(2)-2,0)	+ROUNDDOWN(''Kxp on Board''/250+7,0)

Min level = Look up the level you'd be if you were fighter2 (and no add-ons like double XP), then subtract 2. e.g. Min level for 8 KXP is 4-2 = 2. Min level X means you can be level X in one class, or X-1 in up to four classes.  e.g. if min level is 10, you can be level 10, or 9/9/9/9. 

Max level X means you can be maximum of level X in one class, or X-1 in up to four classes. e.g. if max level is 10, you can be level 10, or 9/9/9/9. Max level also affects a character's max CL, ML, LVL, HNCL, subordinate comprehensibility, and spell/psi comprehensibility. CL & HNCL are capped at 2x max level. ML & LVL are capped at max level. Subordinate comprehensibility is capped at 2x max level. Spell comprehensibility is capped at max level.

If you wanted to establish a [xN] Min and Max level, just multiply the Kxp on Board by 1000^(N-1) where N is the multiplier you want to setup.