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Improvement/Reference Charts

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The tables below are the total bonus you get towards a particular stat when you have multiple equipment providing a bonus. The tables are based off the following optimised upgrade combinations:

Total ★ 11 12 13 14 15 16 17 18 19 20
Equipment 5/6 6/6 6/7 7/7 7/8 8/8 8/9 9/9 9/10 10/10
Total ★ 21 22 23 24 25 26 27 28 29 30
Equipment 7/7/7 7/7/8 7/8/8 8/8/8 8/8/9 8/9/9 9/9/9 9/9/10 9/10/10 10/10/10
Total ★ 31 32 33 34 35 36 37 38 39 40
Equipment 7/8/8/8 8/8/8/8 8/8/8/9 8/8/9/9 8/9/9/9 9/9/9/9 9/9/9/10 9/9/10/10 9/10/10/10 10/10/10/10

It is important to note that while whole number breakpoints are important, fractions should not be discounted as they can be multiplied by various formulas to hit the next whole number. Therefore, you should aim to maximise your available improvement bonus.

0.66 Modifier

  • ASW Anti-Submarine from SONARs and DCs.
Total ★ 1 2 3 4 5 6 7 8 9 10
Bonus 0.66 0.94 1.15 1.33 1.49 1.63 1.76 1.88 2.00 2.10
Total ★ 11 12 13 14 15 16 17 18 19 20
Bonus 3.12 3.26 3.39 3.52 3.64 3.77 3.88 4.00 4.10 4.21
Total ★ 21 22 23 24 25 26 27 28 29 30
Bonus 5.29 5.41 5.53 5.65 5.77 5.88 6.00 6.10 6.21 6.32
Total ★ 31 32 33 34 35 36 37 38 39 40
Bonus 7.42 7.54 7.65 7.77 7.88 8.00 8.10 8.21 8.32 8.43

0.7 Modifier

  • Anti-Air Anti-Air from HA, MG, and AAFD.
Total ★ 1 2 3 4 5 6 7 8 9 10
Bonus 0.70 0.98 1.21 1.40 1.56 1.71 1.85 1.97 2.10 2.21
Total ★ 11 12 13 14 15 16 17 18 19 20
Bonus 3.21 3.42 3.56 3.70 3.83 3.95 4.07 4.20 4.31 4.42
Total ★ 21 22 23 24 25 26 27 28 29 30
Bonus 5.55 5.68 5.81 5.93 6.05 6.17 6.30 6.41 6.52 6.64
Total ★ 31 32 33 34 35 36 37 38 39 40
Bonus 7.79 7.91 8.03 8.15 8.27 8.40 8.51 8.62 8.74 8.85

0.75 Modifier

  • Firepower Firepower from SONARs and DCs.
Total ★ 1 2 3 4 5 6 7 8 9 10
Bonus 0.75 1.06 1.29 1.50 1.67 1.83 1.98 2.12 2.25 2.37
Total ★ 11 12 13 14 15 16 17 18 19 20
Bonus 3.51 3.67 3.82 3.96 4.10 4.24 4.37 4.50 4.62 4.74
Total ★ 21 22 23 24 25 26 27 28 29 30
Bonus 5.95 6.08 6.22 6.36 6.49 6.62 6.75 6.87 6.99 7.11
Bonus 8.34 8.48 8.61 8.74 8.87 9.00 9.12 9.24 9.36 9.48

1.0 Modifier

  • Firepower Firepower from small and medium caliber guns, secondary (yellow) guns, MG, AAFD, AP shells, AA shells, landing craft, searchlights and anti-ground rockets.
  • Night Battle Power Night Battle Power from small, medium and large caliber guns, secondary (yellow) guns, AAFD, torpedoes, AP shells, AA shells, landing craft, searchlights and anti-ground rockets.
  • Shelling Accuracy Accuracy from small, medium and large caliber guns, secondary (yellow & green) guns, AAFD, and AA RADAR.
Total ★ 1 2 3 4 5 6 7 8 9 10
Bonus 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Total ★ 11 12 13 14 15 16 17 18 19 20
Bonus 4.68 4.89 5.09 5.29 5.47 5.65 5.82 6.00 6.16 6.32
Total ★ 21 22 23 24 25 26 27 28 29 30
Bonus 7.93 8.11 8.30 8.48 8.65 8.82 9.00 9.16 9.32 9.48
Total ★ 31 32 33 34 35 36 37 38 39 40
Bonus 11.13 11.31 11.48 11.65 11.82 12.00 12.16 12.32 12.48 12.64

1.2 Modifier

  • Torpedo power Torpedo Attack from MG and torpedoes.
  • Line of Sight View Range from carrier-based recons and seaplanes (recon & bomber).
Total ★ 1 2 3 4 5 6 7 8 9 10
Bonus 1.20 1.69 2.07 2.40 2.68 2.93 3.17 3.39 3.60 3.79
Total ★ 11 12 13 14 15 16 17 18 19 20
Bonus 5.62 5.87 6.11 6.34 6.56 6.78 6.99 7.20 7.39 7.58
Total ★ 21 22 23 24 25 26 27 28 29 30
Bonus 9.52 9.74 9.96 10.18 10.38 10.59 10.80 10.99 11.18 11.38
Total ★ 31 32 33 34 35 36 37 38 39 40
Bonus 13.35 13.57 13.78 13.98 14.19 14.40 14.59 14.78 14.98 15.17

1.25 Modifier

  • Line of Sight View Range from RADARs (LOS & AA).
Total ★ 1 2 3 4 5 6 7 8 9 10
Bonus 1.25 1.76 2.16 2.50 2.79 3.06 3.30 3.53 3.75 3.95
Total ★ 11 12 13 14 15 16 17 18 19 20
Bonus 5.85 6.12 6.36 6.61 6.84 7.07 7.28 7.50 7.70 7.90
Total ★ 21 22 23 24 25 26 27 28 29 30
Bonus 9.92 10.14 10.37 10.60 10.82 11.03 11.25 11.45 11.65 11.85
Total ★ 31 32 33 34 35 36 37 38 39 40
Bonus 13.91 14.14 14.35 14.57 14.78 15.00 15.20 15.40 15.60 15.81

1.3 Modifier

  • ASW Accuracy Accuracy from SONARs.
Total ★ 1 2 3 4 5 6 7 8 9 10
Bonus 1.30 1.83 2.25 2.60 2.90 3.18 3.43 3.67 3.90 4.11
Total ★ 11 12 13 14 15 16 17 18 19 20
Bonus 6.09 6.36 6.62 6.87 7.11 7.35 7.57 7.80 8.01 8.22
Total ★ 21 22 23 24 25 26 27 28 29 30
Bonus 10.31 10.55 10.79 11.03 11.25 11.47 11.70 11.991 12.12 12.33
Total ★ 31 32 33 34 35 36 37 38 39 40
Bonus 14.47 14.70 14.93 15.15 15.37 15.60 15.81 16.02 16.23 16.44

1.5 Modifier

  • Firepower Firepower from large caliber main guns.
  • Fleet Anti-Air Anti-Air from AA RADARs.
  • Torpedo evasion Evasion from sonars.
  • Evasion Evasion from engines.
Total ★ 1 2 3 4 5 6 7 8 9 10
Bonus 1.50 2.12 2.59 3.00 3.35 3.67 3.96 4.24 4.50 4.74
Total ★ 11 12 13 14 15 16 17 18 19 20
Bonus 7.02 7.34 7.64 7.93 8.21 8.48 8.74 9.00 9.24 9.48
Total ★ 21 22 23 24 25 26 27 28 29 30
Bonus 11.90 12.17 12.45 12.72 12.98 13.24 13.50 13.74 13.98 14.23
Total ★ 31 32 33 34 35 36 37 38 39 40
Bonus 16.69 16.97 17.22 17.48 17.74 18.00 18.24 18.48 18.73 18.97

2.0 Modifier

  • Torpedo accuracy Accuracy from MG and torpedoes.
  • Fleet Anti-Air Anti-Air from AAFD.
Total ★ 1 2 3 4 5 6 7 8 9 10
Bonus 2.00 2.82 3.46 4.00 4.47 4.89 5.29 5.65 6.00 6.32
Total ★ 11 12 13 14 15 16 17 18 19 20
Bonus 9.37 9.79 10.19 10.58 10.94 11.31 11.65 12.00 12.32 12.64
Total ★ 21 22 23 24 25 26 27 28 29 30
Bonus 15.87 16.23 16.60 16.97 17.31 17.65 18.00 18.32 18.64 18.97
Total ★ 31 32 33 34 35 36 37 38 39 40
Bonus 22.26 22.62 22.97 23.31 23.65 24.00 24.32 24.64 24.97 25.29

3.0 Modifier

  • Fleet Anti-Air Anti-Air from high angle guns.
Total ★ 1 2 3 4 5 6 7 8 9 10
Bonus 3.00 4.24 5.19 6.00 6.70 7.34 7.93 8.48 9.00 9.48
Total ★ 11 12 13 14 15 16 17 18 19 20
Bonus 14.05 14.69 15.28 15.87 16.42 16.97 17.48 18.00 18.48 18.97
Total ★ 21 22 23 24 25 26 27 28 29 30
Bonus 23.81 24.35 24.90 25.45 25.97 26.48 27.00 27.48 27.97 28.46
Total ★ 31 32 33 34 35 36 37 38 39 40
Bonus 33.39 33.94 34.45 34.97 35.48 36.00 36.48 36.97 37.46 37.94

1.0+1.5 Modifier

Bonus Firepower Firepower for Battleships with 2 main guns and 1 AP. Highlights indicate threshold changes.

Total Main Gun ★ AP Shell ★
Gun 1 Gun 2 1 2 3 4 5 6 7 8 9 10
1 1 4.000 4.414 4.732 5.000 5.236 5.449 5.646 5.828 6.000 6.162
2 1 4.621 5.036 5.353 5.621 5.857 6.071 6.267 6.450 6.621 6.784
3 1 5.098 5.512 5.830 6.098 6.334 6.548 6.744 6.927 7.098 7.260
2 2 5.243 5.657 5.975 6.243 6.479 6.692 6.888 7.071 7.243 7.405
4 1 5.500 5.914 6.232 6.500 6.736 6.949 7.146 7.328 7.500 7.662
3 2 5.719 6.134 6.451 6.719 6.955 7.169 7.365 7.548 7.719 7.882
5 1 5.854 6.268 6.586 6.854 7.090 7.304 7.500 7.683 7.854 8.016
4 2 6.121 6.536 6.853 7.121 7.357 7.571 7.767 7.950 8.121 8.284
6 1 6.174 6.588 6.906 7.174 7.410 7.624 7.820 8.003 8.174 8.337
3 3 6.196 6.610 6.928 7.196 7.432 7.646 7.842 8.025 8.196 8.358
7 1 6.469 6.883 7.201 7.469 7.705 7.918 8.114 8.297 8.469 8.631
5 2 6.475 6.890 7.207 7.475 7.711 7.925 8.121 8.304 8.475 8.638
4 3 6.598 7.012 7.330 7.598 7.834 8.048 8.244 8.427 8.598 8.760
8 1 6.743 7.157 7.475 7.743 7.979 8.192 8.388 8.571 8.743 8.905
6 2 6.796 7.210 7.528 7.796 8.032 8.245 8.441 8.624 8.796 8.958
5 3 6.952 7.366 7.684 7.952 8.188 8.402 8.598 8.781 8.952 9.114
9 1 7.000 7.414 7.732 8.000 8.236 8.449 8.646 8.828 9.000 9.162
4 4 7.000 7.414 7.732 8.000 8.236 8.449 8.646 8.828 9.000 9.162
7 2 7.090 7.504 7.822 8.090 8.326 8.539 8.736 8.918 9.090 9.252
10 1 7.243 7.658 7.975 8.243 8.479 8.693 8.889 9.072 9.243 9.406
6 3 7.272 7.687 8.004 8.272 8.508 8.722 8.918 9.101 9.272 9.435
5 4 7.354 7.768 8.086 8.354 8.590 8.804 9.000 9.183 9.354 9.516
8 2 7.364 7.778 8.096 8.364 8.600 8.813 9.010 9.192 9.364 9.526
7 3 7.567 7.981 8.299 8.567 8.803 9.016 9.212 9.395 9.567 9.729
9 2 7.621 8.036 8.353 8.621 8.857 9.071 9.267 9.450 9.621 9.784
6 4 7.674 8.088 8.406 8.674 8.910 9.124 9.320 9.503 9.674 9.837
5 5 7.708 8.122 8.440 8.708 8.944 9.158 9.354 9.537 9.708 9.870
8 3 7.841 8.255 8.573 8.841 9.077 9.290 9.486 9.669 9.841 10.003
10 2 7.865 8.279 8.597 8.865 9.101 9.314 9.510 9.693 9.865 10.027
7 4 7.969 8.383 8.701 8.969 9.205 9.418 9.614 9.797 9.969 10.131
6 5 8.028 8.443 8.760 9.028 9.264 9.478 9.674 9.857 10.028 10.191
9 3 8.098 8.512 8.830 9.098 9.334 9.548 9.744 9.927 10.098 10.260
8 4 8.243 8.657 8.975 9.243 9.479 9.692 9.888 10.071 10.243 10.405
7 5 8.323 8.737 9.055 9.323 9.559 9.772 9.968 10.151 10.323 10.485
10 3 8.341 8.756 9.074 9.341 9.578 9.791 9.987 10.170 10.341 10.504
6 6 8.348 8.763 9.081 9.348 9.585 9.798 9.994 10.177 10.348 10.511
9 4 8.500 8.914 9.232 9.500 9.736 9.949 10.146 10.328 10.500 10.662
8 5 8.597 9.011 9.329 9.597 9.833 10.046 10.242 10.425 10.597 10.759
7 6 8.643 9.057 9.375 9.643 9.879 10.092 10.289 10.471 10.643 10.805
10 4 8.743 9.158 9.475 9.743 9.979 10.193 10.389 10.572 10.743 10.906
9 5 8.854 9.268 9.586 9.854 10.090 10.304 10.500 10.683 10.854 11.016
8 6 8.917 9.331 9.649 9.917 10.153 10.366 10.563 10.745 10.917 11.079
7 7 8.937 9.351 9.669 9.937 10.173 10.387 10.583 10.766 10.937 11.100
10 5 9.098 9.512 9.830 10.098 10.334 10.547 10.743 10.926 11.098 11.260
9 6 9.174 9.588 9.906 10.174 10.410 10.624 10.820 11.003 11.174 11.337
8 7 9.211 9.625 9.943 10.211 10.447 10.661 10.857 11.040 11.211 11.374
10 6 9.418 9.832 10.150 10.418 10.654 10.867 11.063 11.246 11.418 11.580
9 7 9.469 9.883 10.201 10.469 10.705 10.918 11.114 11.297 11.469 11.631
8 8 9.485 9.899 10.217 10.485 10.721 10.935 11.131 11.314 11.485 11.648
10 7 9.712 10.126 10.444 10.712 10.948 11.162 11.358 11.540 11.712 11.874
9 8 9.743 10.157 10.475 10.743 10.979 11.192 11.388 11.571 11.743 11.905
10 8 9.986 10.400 10.718 10.986 11.222 11.436 11.632 11.814 11.986 12.148
9 9 10.000 10.414 10.732 11.000 11.236 11.449 11.646 11.828 12.000 12.162
10 9 10.243 10.658 10.975 11.243 11.479 11.693 11.889 12.072 12.243 12.406
10 10 10.487 10.901 11.219 11.487 11.723 11.936 12.133 12.315 12.487 12.649

See Also

Improvement
https://akashi-list.me/