Powers explained (Kinda)
The average person has a strength of 5-7.
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Seaman First Class 10-15
Petty Officer 16-20
Chief Petty Officer 21-30
Master Chief Petty Officer 31-45
Warrant Officer 46-50
Ensign 51-60
Lieutenant Junior Grade 61-65
Lieutenant 66-75
Lieutenant Commander 76-85
Commander 86-99
Captain 100-300
Commodore 301-1000
Rear Admiral 1001-2500
Vice-Admiral 2501-5000
Admiral 5001-10000
Fleet Admiral 10001-15000
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Pirates
0-1 Million Belly 16-20
2-4 Million Belly 21-30
5-10 Million Belly 31-45
11-15 Million Belly 46-50
16-17Million Belly 51-60
18-20 Million Belly 61-65
21-23 Million Belly 66-75
24-30 Million Belly 76-85
31-50 Million Belly 86-99
50-100 Million Belly 100-300
101-200 Million Belly 301-1000
201-400 Million Belly 1001-2500
401-1000 Million Belly 2501-5000
1001-6000 Million Belly 5001-20000
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Peak strength.
Gol D. Roger Power - 17000
Silvers Rayleigh - 15000
Monkey D. Garp - 16000
Sengoku - 15000
Rocks D. Xebec - 19000
Shiki - 14000-16000
Edward Newgate - 15000-18000
Kaido 15000-18000
Charlotte Linlin a.k.a. Big MAMA 14000-17000
Can't calculate the powers precisely. Some fruit abilities are better some worse.
Weekly Power Status
-- Power
Ranking 
-- Power
stone