WoWS Stats & Numbers EU

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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 54405.358509738 = 108810.71701948	2 x 50.339127011003/100 = 1.0067825402201	2 x 0.71066045723961 = 1.4213209144792
Warspite	1	155185	1	1	1 x 46394.401849355 = 46394.401849355	1 x 51.292258717009/100 = 0.51292258717009	1 x 0.80938740127142 = 0.80938740127142
Aigle	1	51576	1	2	1 x 26184.74604601 = 26184.74604601	1 x 51.309036664272/100 = 0.51309036664272	1 x 0.71053378864125 = 0.71053378864125
Lion	1	117285	1	2	1 x 78220.409216227 = 78220.409216227	1 x 50.561308586058/100 = 0.50561308586058	1 x 0.70102402520676 = 0.70102402520676
Sums		378514	4	6	259610.27413107	2.5384085798934	3.6422661295986

2. Calculate ratios

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

rDmg = 378514/259610.27413107 = 1.4580085525001
rFrags = 6/3.6422661295986 = 1.6473260839567
rWins = 4/2.5384085798934 = 1.5757904506326

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, (1.4580085525001 - 0.4) / (1 - 0.4)) = 1.7633475875002
nFrags = max(0, (1.6473260839567 - 0.1) / (1 - 0.1)) = 1.7192512043964
nWins = max(0, (1.5757904506326 - 0.7) / (1 - 0.7)) = 2.9193015021088

4. PR value:

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

PR =  700*1.7633475875002 + 300*1.7192512043964 + 150*2.9193015021088 = 2188.0138978854 ≈ 2188

Personal Rating - Color Scale

Skill	Range
表现平平	0 - 750
低於平均值	750 - 1100
平均	1100 - 1350
不錯	1350 - 1550
非常好	1550 - 1750
很棒	1750 - 2100
Unicum	2100 - 2450
Super Unicum	2450 - 9999