Improvement/Reference Charts

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 on the following optimized 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

0.5 Modifier

  • Equipment AA   from land-based bombers.
Total ★ 1 2 3 4 5 6 7 8 9 10
Bonus 0.50 0.70 0.86 1.00 1.11 1.22 1.32 1.41 1.50 1.58

0.66 Modifier

  • ASW   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   from HA Guns, MG, and AAFD,
  • Torpedo   from Land Based Bombers.
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   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
Total ★ 31 32 33 34 35 36 37 38 39 40
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   from small and medium guns, 15.2 cm Single , OTO , 90 mm Single HA , MG, AAFD, shells, landing craft, amphibious tanks, searchlights, anti-ground rockets, and lookouts.
  • Night Battle Power   from small, medium, and large guns, 15.2 cm Single , OTO , 90 mm Single HA , AAFD, torpedoes, midget submarines, shells, landing craft, amphibious tanks, searchlights, anti-ground rockets, and lookouts.
  • Shelling Accuracy   from small, medium, large, and secondary guns, AAFD, air radars, small dual-purpose radars, liaison aircraft, and shells.
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   from MG and torpedoes.
  • Line of Sight   from carrier-based recons and seaplanes recons.
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   from small surface and dual-purpose radars.
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   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

1.4 Modifier

  • Line of Sight   from large radars.
Total ★ 1 2 3 4 5 6 7 8 9 10
Bonus 1.40 1.97 2.42 2.80 3.13 3.42 3.70 3.95 4.20 4.42

1.5 Modifier

  • Firepower   from large caliber main guns.
  • Fleet Anti-Air   from air and dual-purpose radars.
  • Torpedo evasion   from sonars.
  • 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   from MG and torpedoes.
  • Fleet 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   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   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/