WoWS Stats & Numbers NA

Personal Rating - About

The Personal Rating is measure of skill in World of Warships. It measures performance in every warship and compares it to certain expected values. Differences between actual and expected values are used to calculate final Personal Rating value.

Basic assumptions:

values in the range of 0 - 3000,
colors and values similar to the well-known World of Tanks WN8,
WoWS is more strategic game than WoT so win rate should influence Personal Rating,
number of destroyed planes should be ignored - in WoWS AA is automated so no skill is needed to destroy planes. Even with CVs killing planes is very easy (click and forget)
elements in order of importance: damage dealt, warship kills, win rate,

Formula:
Personal Rating calculations are based on expected and actual values of wins, damage dealt and warships kills. To get expected values use expected values for warships (preview, json) and multiply them by number of battles played.

Step 1 - ratios:

rDmg = actualDmg/expectedDmg
rWins = actualWins/expectedWins
rFrags = actualFrags/expectedFrags

Step 2 - normalization:

nDmg = max(0, (rDmg - 0.4) / (1 - 0.4))
nFrags = max(0, (rFrags - 0.1) / (1 - 0.1))
nWins = max(0, (rWins - 0.7) / (1 - 0.7))

Step 3 - PR value:

PR =  700*nDMG + 300*nFrags + 150*nWins

You are free to use our Personal Rating formula and expected values, however we demand, that you attribute our site by providing link to WoWS Stats & Numbers.

If you have questions contact Wiochi on World of Warships forums.

Personal Rating - Overall PR example

1. Calculate sums of actual and expected values

Warship	Battles	Damage	Wins	Frags	Damage	Wins	Frags
		Actual values total values for each warship			Expected values Values: preview, json
Neptune	2	54468	1	1	2 x 53503.051225436 = 107006.10245087	2 x 50.265961580923/100 = 1.0053192316185	2 x 0.7106668138662 = 1.4213336277324
Warspite	1	155185	1	1	1 x 45544.262560778 = 45544.262560778	1 x 51.002900121554/100 = 0.51002900121554	1 x 0.79479335494328 = 0.79479335494328
Aigle	1	51576	1	2	1 x 25948.394727139 = 25948.394727139	1 x 51.173602507375/100 = 0.51173602507375	1 x 0.70396386430677 = 0.70396386430677
Lion	1	117285	1	2	1 x 77775.720149254 = 77775.720149254	1 x 50.756689150403/100 = 0.50756689150403	1 x 0.71302525832376 = 0.71302525832376
Sums		378514	4	6	256274.47988804	2.5346511494118	3.6331161053062

2. Calculate ratios

rDmg = actualDmg/expectedDmg
rFrags = actualFrags/expectedFrags
rWins = actualWins/expectedWins

rDmg = 378514/256274.47988804 = 1.4769867064616
rFrags = 6/3.6331161053062 = 1.6514748843938
rWins = 4/2.5346511494118 = 1.5781264419477

3. Normalization:

nDmg = max(0, (rDmg - 0.4) / (1 - 0.4))
nFrags = max(0, (rFrags - 0.1) / (1 - 0.1))
nWins = max(0, (rWins - 0.7) / (1 - 0.7))

nDmg = max(0, (1.4769867064616 - 0.4) / (1 - 0.4)) = 1.7949778441027
nFrags = max(0, (1.6514748843938 - 0.1) / (1 - 0.1)) = 1.7238609826598
nWins = max(0, (1.5781264419477 - 0.7) / (1 - 0.7)) = 2.9270881398258

4. PR value:

PR =  700*nDMG + 300*nFrags + 150*nWins

PR =  700*1.7949778441027 + 300*1.7238609826598 + 150*2.9270881398258 = 2212.7060066437 ≈ 2213

Personal Rating - Color Scale

Skill	Range
Cattivo	0 - 750
Sotto la media	750 - 1100
Nella media	1100 - 1350
Buono	1350 - 1550
Molto buono	1550 - 1750
Ottimo	1750 - 2100
Unicum	2100 - 2450
Super Unicum	2450 - 9999