Japanese and American Strength by Month During the Pacific War

Here is this sites piece de resistance! A chart of Japanese and American strengths during the Pacific War.

Imperial Japanese Naval Strength and American Naval Strength by Month.

  • All statistics are for the end of each month unless otherwise noted. i.e. December, 1941 displays the numbers of ships that existed on December 31st, 1941.

  • Japanese statistics are in red

  • American statistics are in blue
  • Information compiled by Jeff Donahoo


  •   CV CV CVL CVL CVE CVE CVS BB BB CA CA CL CL DD DD DE DE PF PF SS SS PG PG SC SC PR PR CM CM AM AM
    12/7/1941 6 7 3 0 1 1 5 10 17 18 18 20 19 101 168 9 0 29 0 63 115 0 54 23 10 10 5 33 12 19 124
    Dec-41 6 7 4 0 1 1 5 11 10 18 18 20 20 98 168 9 0 27 0 60 114 0 54 26 10 10 4 33 12 17 124
    Jan-42 6 7 4 0 1 1 5 11 10 18 18 20 21 98 172 9 0 26 0 57 115 0 56 27 11 10 4 33 12 16 128
    Feb-42 6 7 4 0 1 1 5 11 11 18 18 20 23 97 170 9 0 26 0 61 115 0 62 27 11 10 4 33 12 15 134
    Mar-42 6 7 4 0 1 2 5 11 12 18 17 20 23 99 170 9 0 26 0 61 114 0 68 27 16 10 3 34 12 15 147
    Apr-42 6 7 4 0 1 2 5 11 13 18 17 20 23 99 173 9 0 26 0 62 115 0 76 28 29 10 3 35 12 15 173
    May-42 7 6 3 0 2 2 4 11 14 18 17 20 23 98 177 9 0 26 0 62 119 0 77 30 46 10 0 34 13 15 194
    Jun-42 3 5 3 0 2 3 4 11 14 17 17 20 25 99 185 9 0 26 0 63 121 0 82 31 56 10 0 34 13 15 202
    Jul-42 4 5 3 0 2 3 4 11 14 17 17 20 25 97 192 9 0 26 0 63 122 0 86 29 77 10 0 34 14 16 224
    Aug-42 4 5 2 0 2 6 4 12 15 16 14 20 25 98 197 9 0 26 0 63 122 0 86 32 91 10 0 35 15 16 250
    Sep-42 4 4 2 0 2 10 4 12 15 16 14 20 26 97 206 9 0 26 0 65 123 0 89 32 111 10 0 35 16 16 265
    Oct-42 4 3 2 0 2 10 4 12 16 15 14 20 27 94 205 9 0 26 0 65 127 0 92 35 139 10 0 35 16 16 285
    Nov-42 4 3 3 0 3 11 4 10 16 14 14 20 26 89 208 9 0 27 0 63 128 0 94 35 165 10 0 37 16 16 294
    Dec-42 4 4 3 0 3 12 4 10 16 14 13 20 26 89 220 9 0 27 2 61 131 0 98 36 190 10 0 37 16 16 302
      CV CV CVL CVL CVE CVE CVS BB BB CA CA CL CL DD DD DE DE PF PF SS SS PG PG SC SC PR PR CM CM AM AM
    Jan-43 4 4 3 1 3 12 2 10 16 14 12 20 27 90 222 9 1 26 2 62 134 0 95 37 209 10 0 37 16 17 311
    Feb-43 4 5 3 2 3 13 2 10 17 14 12 20 27 89 232 9 3 26 2 62 136 0 94 38 226 10 0 37 16 17 326
    Mar-43 4 5 3 3 3 14 2 10 17 14 12 21 28 83 239 9 5 27 2 65 138 0 97 39 240 11 0 37 16 19 343
    Apr-43 4 6 3 3 3 17 2 10 17 14 13 21 28 84 251 9 15 29 2 67 140 0 98 39 261 11 0 37 16 20 364
    May-43 4 7 3 4 3 17 2 10 18 14 13 21 28 82 263 9 31 29 2 62 145 0 98 41 292 11 0 37 16 20 377
    Jun-43 4 7 3 5 3 17 2 9 18 14 14 22 28 82 272 9 47 30 2 62 147 0 100 41 318 11 0 37 16 21 395
    Jul-43 4 7 3 6 3 18 1 9 18 14 14 21 28 74 283 9 72 32 2 62 153 0 103 43 241 11 0 36 16 23 424
    Aug-43 4 7 3 7 3 21 1 9 18 14 14 21 29 71 291 9 104 33 2 61 157 0 103 44 364 11 0 36 16 23 456
    Sep-43 4 7 3 7 3 23 1 9 18 14 14 21 29 71 301 9 134 32 3 65 159 0 101 45 372 11 0 35 16 22 484
    Oct-43 4 7 4 7 3 27 1 9 18 14 15 21 29 70 303 9 162 34 5 66 163 0 114 46 380 11 0 35 16 23 500
    Nov-43 4 10 4 8 4 30 1 9 18 14 15 20 29 67 312 8 197 37 7 65 166 0 121 49 382 11 0 34 15 23 517
    Dec-43 4 10 4 9 4 35 1 9 18 14 16 20 32 69 324 7 229 37 14 66 170 0 122 49 373 10 0 34 15 23 534
      CV CV CVL CVL CVE CVE CVS BB BB CA CA CL CL DD DD DE DE PF PF SS SS PG PG SC SC PR PR CM CM AM AM
    Jan-44 4 11 5 9 4 39 1 9 19 14 16 19 33 67 327 7 248 39 18 68 174 0 127 50 373 10 0 34 15 23 539
    Feb-44 4 11 5 9 4 43 1 9 19 14 16 14 33 63 336 7 276 41 22 65 177 5 139 45 373 10 0 33 15 22 550
    Mar-44 5 11 5 9 4 47 1 9 19 14 16 13 33 63 346 6 305 41 29 64 183 12 154 45 365 11 0 32 15 22 552
    Apr-44 5 12 5 9 4 52 1 9 20 14 16 13 32 60 352 7 326 45 35 60 190 20 164 45 371 11 0 30 18 22 559
    May-44 5 13 5 9 4 57 1 9 20 14 16 13 33 60 356 6 351 45 39 59 197 23 171 46 370 10 0 30 19 25 574
    Jun-44 2 13 5 9 4 63 1 9 21 14 17 15 35 54 361 9 366 44 40 52 204 22 174 47 371 11 0 29 19 26 556
    Jul-44 4 13 5 9 4 65 1 9 21 14 17 14 36 51 369 10 371 46 43 49 212 27 173 46 370 11 0 28 19 26 574
    Aug-44 4 14 5 9 3 65 1 9 21 14 17 12 37 49 372 11 377 44 48 53 217 32 167 45 365 11 0 27 24 25 580
    Sep-44 4 15 5 9 2 65 0 9 22 14 18 11 39 46 375 15 384 43 55 56 222 36 155 44 347 11 0 24 27 26 580
    Oct-44 4 16 2 8 2 63 0 6 22 7 19 6 39 35 373 17 391 45 62 52 222 45 159 45 331 11 0 20 29 26 568
    Nov-44 4 17 2 8 1 64 0 5 22 6 19 5 39 23 368 20 390 39 67 50 223 51 171 41 322 10 0 20 29 21 597
    Dec-44 3 17 2 8 1 65 0 5 22 6 19 4 42 21 368 17 382 43 70 52 232 63 177 38 322 10 0 20 29 21 603
      CV CV CVL CVL CVE CVE CVS BB BB CA CA CL CL DD DD DE DE PF PF SS SS PG PG SC SC PR PR CM CM AM AM
    Jan-45 3 18 2 8 1 64 0 5 22 6 20 4 44 20 371 16 382 42 72 50 234 63 182 35 322 9 0 19 29 18 601
    Feb-45 3 18 2 8 1 64 0 5 22 6 21 4 45 19 379 17 378 42 77 44 235 77 185 33 322 9 0 18 28 18 607
    Mar-45 3 18 2 8 1 65 0 5 22 6 21 4 45 19 388 23 378 43 78 43 229 80 187 29 322 9 0 18 31 16 607
    Apr-45 3 19 2 8 1 66 0 4 22 6 22 2 45 14 390 24 374 45 78 37 229 78 189 27 322 9 0 18 30 14 601
    May-45 3 19 2 8 1 69 0 4 22 5 22 2 46 14 382 27 373 43 78 43 226 79 192 25 316 8 0 16 28 11 581
    Jun-45 3 20 2 8 1 70 0 4 22 4 23 2 47 14 380 27 371 44 77 41 224 79 193 23 304 8 0 15 23 11 572
    Jul-45 1 20 2 8 0 71 0 1 22 2 24 1 47 13 386 24 369 42 66 42 219 75 191 20 301 7 0 15 23 8 556
    Aug-45 1 20 2 8 0 71 0 1 22 2 25 1 47 14 389 24 368 38 54 40 219 65 188 19 290 7 0 16 23 6 546

     

    CV=Fleet Aircraft Carrier
    CVL=Light Aircraft Carrier
    CVE=Escort Aircraft Carrier
    CVS=Seaplane Carrier
    BB=Battleship
    CA=Heavy Cruiser
    CL=Light Cruiser
    DD=Destroyer
    DE=Destroyer Escort
    PF=
    SS=Submarine

    PG=Ocean Escorts (PG,PY,Pyc,PCE,PE,PCS,PGM,PTC)
    PR=River Gunboats
    SC=Submarine Chasers
    CM=Minelayers (CM,CMc,DMACM)
    AM=Minesweepers (AM,Amc,YMS,DMS)

    Further American Naval Strength by Month

    PC PT AP AK AO AR AD AG LS
    12/7/1941 4 31 39 39 29 10 65 91 0
    Dec-41 4 28 44 39 29 10 65 88 0
    Jan-42 4 39 44 41 28 10 65 89 0
    Feb-42 4 34 44 42 30 11 64 95 0
    Mar-42 7 36 43 44 28 11 64 96 0
    Apr-42 17 33 46 46 32 12 63 100 0
    May-42 26 33 48 51 33 13 64 105 0
    Jun-42 35 37 49 52 34 13 63 117 0
    Jul-42 44 51 50 53 35 15 63 126 0
    Aug-42 54 68 54 56 35 15 63 132 0
    Sep-42 65 85 61 57 39 15 64 139 0
    Oct-42 72 96 69 61 41 15 64 143 1
    Nov-42 75 115 63 62 43 15 63 149 15
    Dec-42 78 137 67 66 44 15 63 159 38
    Jan-43 85 152 70 68 47 14 71 165 65
    Feb-43 91 171 69 68 51 14 71 169 112
    Mar-43 98 192 70 70 54 14 73 169 124
    Apr-43 108 211 73 74 62 15 74 173 139
    May-43 121 233 74 80 64 17 75 180 160
    Jun-43 129 250 78 80 65 16 77 182 184
    Jul-43 140 267 82 86 65 18 77 184 196
    Aug-43 152 283 88 90 68 21 78 188 211
    Sep-43 152 297 93 90 68 22 78 190 233
    Oct-43 175 309 96 101 70 27 79 194 248
    Nov-43 185 312 102 107 73 30 77 198 264
    Dec-43 194 323 106 109 76 32 72 212 287
    Jan-44 200 340 111 115 77 33 75 223 313
    Feb-44 204 348 119 121 83 36 76 228 357
    Mar-44 207 358 124 127 84 41 80 236 358
    Apr-44 212 371 129 130 87 47 81 251 415
    May-44 219 389 139 133 92 51 84 262 480
    Jun-44 247 389 144 137 95 54 85 270 520
    Jul-44 257 387 159 141 99 55 87 283 562
    Aug-44 261 381 166 151 102 59 92 291 602
    Sep-44 265 375 189 162 107 62 94 298 649
    Oct-44 266 345 229 173 112 63 93 305 686
    Nov-44 267 362 274 187 116 65 95 305 717
    Dec-44 268 343 326 203 122 68 96 316 731
    Jan-45 272 339 355 214 124 71 95 318 768
    Feb-45 274 341 361 230 132 73 96 325 794
    Mar-45 276 351 388 244 134 78 97 345 813
    Apr-45 278 354 397 268 134 82 96 351 832
    May-45 277 363 405 281 135 91 97 356 841
    Jun-45 277 371 421 291 136 103 97 383 845
    Jul-45 277 382 427 302 138 111 97 386 847
    Aug-45 277 375 432 307 143 112 98 392 846
    U/C 0 10 0 1 8 2 7 5 4
    F/O 2 16 13 14 15 10 17 10 3
    Allied 34 230 1 3 2 0 4 133

    PF=Frigates
    PG=Ocean Escorts (PG,PY,Pyc,PCE,PE,PCS,PGM,PTC)
    PR=River Gunboats
    PC=Steel Patrol Craft
    PT=Torpedo boats
    SC=Submarine Chasers
    CM=Minelayers (CM,CMc,DMACM)
    AM=Minesweepers (AM,Amc,YMS,DMS)
    AP=Troop Transports (AP,APA,APD,APB,APH,AH)
    AK=Cargo Ships (AKAKS,AKA,AKN,AE,AF,APM,APV,AVS)
    AO=Tankers (AO,AOG,AW)
    AR=RepairShips (AR,ARH,ARB,ARG,ARL,ARS,ARS(T),ARV)
    AD=Tenders (AD,AS,AGP,AV,AVD,AVP)
    AG=Auxilieries (AG,AB,AGC,AGS,AN,ASR,AT,IX)
    LS=Landing Ships (LST,LSV,LSD)