Player 公會 戰艦

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

Actual values
total values for each warship		 Expected values
Values: preview, json
Warship Battles Damage Wins Frags Damage Wins Frags
Neptune 2 54468 1 1 2 x 53381.161644476 = 106762.32328895 2 x 50.341758934828/100 = 1.0068351786966 2 x 0.7118640504555 = 1.423728100911
Warspite 1 155185 1 1 1 x 45414.532698675 = 45414.532698675 1 x 50.952229925495/100 = 0.50952229925495 1 x 0.79432533112584 = 0.79432533112584
Aigle 1 51576 1 2 1 x 25996.068207441 = 25996.068207441 1 x 51.149248402856/100 = 0.51149248402856 1 x 0.7058737316798 = 0.7058737316798
Lion 1 117285 1 2 1 x 77454.832105586 = 77454.832105586 1 x 50.883985573972/100 = 0.50883985573972 1 x 0.71191835481892 = 0.71191835481892
Sums 378514 4 6 255627.75630065 2.5366898177198 3.6358455185356
2. Calculate ratios

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

rDmg = 378514/255627.75630065 = 1.4807233982636
rFrags = 6/3.6358455185356 = 1.6502351294663
rWins = 4/2.5366898177198 = 1.5768581448384
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, (1.4807233982636 - 0.4) / (1 - 0.4)) = 1.8012056637726
nFrags = max(0, (1.6502351294663 - 0.1) / (1 - 0.1)) = 1.7224834771848
nWins = max(0, (1.5768581448384 - 0.7) / (1 - 0.7)) = 2.9228604827945
4. PR value:

PR =  700*nDMG + 300*nFrags + 150*nWins
PR =  700*1.8012056637726 + 300*1.7224834771848 + 150*2.9228604827945 = 2216.0180802155 ≈ 2216

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