テラバイトをギガバイトに換算するには？
テラバイトの数に 1,000 を掛けます。これはドライブ製造元と国際規格が採る 10 進の定義です。Windows は 1,024 で割った結果を GB と表示しますが、実際は GiB なので 7 % のずれが生まれます。
GB = TB × 1,000TB = GB ÷ 1,000
この二つの単位が使われる場所
同じ 1 台のなかで、主記憶は 1024 の累乗で数えられ、ディスクは 1000 の累乗で数えられます。異なる 2 種類のギガバイトが同じ筐体に同居しているのです。
記憶容量のテラバイトとギガバイト
| 0.25 TB | 250 GB |
| 0.5 TB | 500 GB |
| 1 TB | 1,000 GB |
| 2 TB | 2,000 GB |
| 4 TB | 4,000 GB |
| 6 TB | 6,000 GB |
| 8 TB | 8,000 GB |
| 12 TB（NAS） | 12,000 GB |
| 20 TB | 20,000 GB |
| 50 TB | 50,000 GB |
| 100 TB（サーバー） | 100,000 GB |
すべての値を表示
- 1 TB = 1,000 GB
- 2 TB = 2,000 GB
- 3 TB = 3,000 GB
- 4 TB = 4,000 GB
- 5 TB = 5,000 GB
- 6 TB = 6,000 GB
- 7 TB = 7,000 GB
- 8 TB = 8,000 GB
- 9 TB = 9,000 GB
- 10 TB = 10,000 GB
- 11 TB = 11,000 GB
- 12 TB = 12,000 GB
- 13 TB = 13,000 GB
- 14 TB = 14,000 GB
- 15 TB = 15,000 GB
- 16 TB = 16,000 GB
- 17 TB = 17,000 GB
- 18 TB = 18,000 GB
- 19 TB = 19,000 GB
- 20 TB = 20,000 GB
- 21 TB = 21,000 GB
- 22 TB = 22,000 GB
- 23 TB = 23,000 GB
- 24 TB = 24,000 GB
- 25 TB = 25,000 GB
- 26 TB = 26,000 GB
- 27 TB = 27,000 GB
- 28 TB = 28,000 GB
- 29 TB = 29,000 GB
- 30 TB = 30,000 GB
- 31 TB = 31,000 GB
- 32 TB = 32,000 GB
- 33 TB = 33,000 GB
- 34 TB = 34,000 GB
- 35 TB = 35,000 GB
- 36 TB = 36,000 GB
- 37 TB = 37,000 GB
- 38 TB = 38,000 GB
- 39 TB = 39,000 GB
- 40 TB = 40,000 GB
- 41 TB = 41,000 GB
- 42 TB = 42,000 GB
- 43 TB = 43,000 GB
- 44 TB = 44,000 GB
- 45 TB = 45,000 GB
- 46 TB = 46,000 GB
- 47 TB = 47,000 GB
- 48 TB = 48,000 GB
- 49 TB = 49,000 GB
- 50 TB = 50,000 GB
- 51 TB = 51,000 GB
- 52 TB = 52,000 GB
- 53 TB = 53,000 GB
- 54 TB = 54,000 GB
- 55 TB = 55,000 GB
- 56 TB = 56,000 GB
- 57 TB = 57,000 GB
- 58 TB = 58,000 GB
- 59 TB = 59,000 GB
- 60 TB = 60,000 GB
- 61 TB = 61,000 GB
- 62 TB = 62,000 GB
- 63 TB = 63,000 GB
- 64 TB = 64,000 GB
- 65 TB = 65,000 GB
- 66 TB = 66,000 GB
- 67 TB = 67,000 GB
- 68 TB = 68,000 GB
- 69 TB = 69,000 GB
- 70 TB = 70,000 GB
- 71 TB = 71,000 GB
- 72 TB = 72,000 GB
- 73 TB = 73,000 GB
- 74 TB = 74,000 GB
- 75 TB = 75,000 GB
- 76 TB = 76,000 GB
- 77 TB = 77,000 GB
- 78 TB = 78,000 GB
- 79 TB = 79,000 GB
- 80 TB = 80,000 GB
- 81 TB = 81,000 GB
- 82 TB = 82,000 GB
- 83 TB = 83,000 GB
- 84 TB = 84,000 GB
- 85 TB = 85,000 GB
- 86 TB = 86,000 GB
- 87 TB = 87,000 GB
- 88 TB = 88,000 GB
- 89 TB = 89,000 GB
- 90 TB = 90,000 GB
- 91 TB = 91,000 GB
- 92 TB = 92,000 GB
- 93 TB = 93,000 GB
- 94 TB = 94,000 GB
- 95 TB = 95,000 GB
- 96 TB = 96,000 GB
- 97 TB = 97,000 GB
- 98 TB = 98,000 GB
- 99 TB = 99,000 GB
- 100 TB = 100,000 GB
- 101 TB = 101,000 GB
- 102 TB = 102,000 GB
- 103 TB = 103,000 GB
- 104 TB = 104,000 GB
- 105 TB = 105,000 GB
- 106 TB = 106,000 GB
- 107 TB = 107,000 GB
- 108 TB = 108,000 GB
- 109 TB = 109,000 GB
- 110 TB = 110,000 GB
- 111 TB = 111,000 GB
- 112 TB = 112,000 GB
- 113 TB = 113,000 GB
- 114 TB = 114,000 GB
- 115 TB = 115,000 GB
- 116 TB = 116,000 GB
- 117 TB = 117,000 GB
- 118 TB = 118,000 GB
- 119 TB = 119,000 GB
- 120 TB = 120,000 GB
- 121 TB = 121,000 GB
- 122 TB = 122,000 GB
- 123 TB = 123,000 GB
- 124 TB = 124,000 GB
- 125 TB = 125,000 GB
- 126 TB = 126,000 GB
- 127 TB = 127,000 GB
- 128 TB = 128,000 GB
- 129 TB = 129,000 GB
- 130 TB = 130,000 GB
- 131 TB = 131,000 GB
- 132 TB = 132,000 GB
- 133 TB = 133,000 GB
- 134 TB = 134,000 GB
- 135 TB = 135,000 GB
- 136 TB = 136,000 GB
- 137 TB = 137,000 GB
- 138 TB = 138,000 GB
- 139 TB = 139,000 GB
- 140 TB = 140,000 GB
- 141 TB = 141,000 GB
- 142 TB = 142,000 GB
- 143 TB = 143,000 GB
- 144 TB = 144,000 GB
- 145 TB = 145,000 GB
- 146 TB = 146,000 GB
- 147 TB = 147,000 GB
- 148 TB = 148,000 GB
- 149 TB = 149,000 GB
- 150 TB = 150,000 GB
- 151 TB = 151,000 GB
- 152 TB = 152,000 GB
- 153 TB = 153,000 GB
- 154 TB = 154,000 GB
- 155 TB = 155,000 GB
- 156 TB = 156,000 GB
- 157 TB = 157,000 GB
- 158 TB = 158,000 GB
- 159 TB = 159,000 GB
- 160 TB = 160,000 GB
- 161 TB = 161,000 GB
- 162 TB = 162,000 GB
- 163 TB = 163,000 GB
- 164 TB = 164,000 GB
- 165 TB = 165,000 GB
- 166 TB = 166,000 GB
- 167 TB = 167,000 GB
- 168 TB = 168,000 GB
- 169 TB = 169,000 GB
- 170 TB = 170,000 GB
- 171 TB = 171,000 GB
- 172 TB = 172,000 GB
- 173 TB = 173,000 GB
- 174 TB = 174,000 GB
- 175 TB = 175,000 GB
- 176 TB = 176,000 GB
- 177 TB = 177,000 GB
- 178 TB = 178,000 GB
- 179 TB = 179,000 GB
- 180 TB = 180,000 GB
- 181 TB = 181,000 GB
- 182 TB = 182,000 GB
- 183 TB = 183,000 GB
- 184 TB = 184,000 GB
- 185 TB = 185,000 GB
- 186 TB = 186,000 GB
- 187 TB = 187,000 GB
- 188 TB = 188,000 GB
- 189 TB = 189,000 GB
- 190 TB = 190,000 GB
- 191 TB = 191,000 GB
- 192 TB = 192,000 GB
- 193 TB = 193,000 GB
- 194 TB = 194,000 GB
- 195 TB = 195,000 GB
- 196 TB = 196,000 GB
- 197 TB = 197,000 GB
- 198 TB = 198,000 GB
- 199 TB = 199,000 GB
- 200 TB = 200,000 GB
- 205 TB = 205,000 GB
- 210 TB = 210,000 GB
- 215 TB = 215,000 GB
- 220 TB = 220,000 GB
- 225 TB = 225,000 GB
- 230 TB = 230,000 GB
- 235 TB = 235,000 GB
- 240 TB = 240,000 GB
- 245 TB = 245,000 GB
- 250 TB = 250,000 GB
- 255 TB = 255,000 GB
- 260 TB = 260,000 GB
- 265 TB = 265,000 GB
- 270 TB = 270,000 GB
- 275 TB = 275,000 GB
- 280 TB = 280,000 GB
- 285 TB = 285,000 GB
- 290 TB = 290,000 GB
- 295 TB = 295,000 GB
- 300 TB = 300,000 GB
- 305 TB = 305,000 GB
- 310 TB = 310,000 GB
- 315 TB = 315,000 GB
- 320 TB = 320,000 GB
- 325 TB = 325,000 GB
- 330 TB = 330,000 GB
- 335 TB = 335,000 GB
- 340 TB = 340,000 GB
- 345 TB = 345,000 GB
- 350 TB = 350,000 GB
- 355 TB = 355,000 GB
- 360 TB = 360,000 GB
- 365 TB = 365,000 GB
- 370 TB = 370,000 GB
- 375 TB = 375,000 GB
- 380 TB = 380,000 GB
- 385 TB = 385,000 GB
- 390 TB = 390,000 GB
- 395 TB = 395,000 GB
- 400 TB = 400,000 GB
- 405 TB = 405,000 GB
- 410 TB = 410,000 GB
- 415 TB = 415,000 GB
- 420 TB = 420,000 GB
- 425 TB = 425,000 GB
- 430 TB = 430,000 GB
- 435 TB = 435,000 GB
- 440 TB = 440,000 GB
- 445 TB = 445,000 GB
- 450 TB = 450,000 GB
- 455 TB = 455,000 GB
- 460 TB = 460,000 GB
- 465 TB = 465,000 GB
- 470 TB = 470,000 GB
- 475 TB = 475,000 GB
- 480 TB = 480,000 GB
- 485 TB = 485,000 GB
- 490 TB = 490,000 GB
- 495 TB = 495,000 GB
- 500 TB = 500,000 GB
- 510 TB = 510,000 GB
- 520 TB = 520,000 GB
- 530 TB = 530,000 GB
- 540 TB = 540,000 GB
- 550 TB = 550,000 GB
- 560 TB = 560,000 GB
- 570 TB = 570,000 GB
- 580 TB = 580,000 GB
- 590 TB = 590,000 GB
- 600 TB = 600,000 GB
- 610 TB = 610,000 GB
- 620 TB = 620,000 GB
- 630 TB = 630,000 GB
- 640 TB = 640,000 GB
- 650 TB = 650,000 GB
- 660 TB = 660,000 GB
- 670 TB = 670,000 GB
- 680 TB = 680,000 GB
- 690 TB = 690,000 GB
- 700 TB = 700,000 GB
- 710 TB = 710,000 GB
- 720 TB = 720,000 GB
- 730 TB = 730,000 GB
- 740 TB = 740,000 GB
- 750 TB = 750,000 GB
- 760 TB = 760,000 GB
- 770 TB = 770,000 GB
- 780 TB = 780,000 GB
- 790 TB = 790,000 GB
- 800 TB = 800,000 GB
- 810 TB = 810,000 GB
- 820 TB = 820,000 GB
- 830 TB = 830,000 GB
- 840 TB = 840,000 GB
- 850 TB = 850,000 GB
- 860 TB = 860,000 GB
- 870 TB = 870,000 GB
- 880 TB = 880,000 GB
- 890 TB = 890,000 GB
- 900 TB = 900,000 GB
- 910 TB = 910,000 GB
- 920 TB = 920,000 GB
- 930 TB = 930,000 GB
- 940 TB = 940,000 GB
- 950 TB = 950,000 GB
- 960 TB = 960,000 GB
- 970 TB = 970,000 GB
- 980 TB = 980,000 GB
- 990 TB = 990,000 GB
- 1,000 TB = 1,000,000 GB
- 1,025 TB = 1,025,000 GB
- 1,050 TB = 1,050,000 GB
- 1,075 TB = 1,075,000 GB
- 1,100 TB = 1,100,000 GB
- 1,125 TB = 1,125,000 GB
- 1,150 TB = 1,150,000 GB
- 1,175 TB = 1,175,000 GB
- 1,200 TB = 1,200,000 GB
- 1,225 TB = 1,225,000 GB
- 1,250 TB = 1,250,000 GB
- 1,275 TB = 1,275,000 GB
- 1,300 TB = 1,300,000 GB
- 1,325 TB = 1,325,000 GB
- 1,350 TB = 1,350,000 GB
- 1,375 TB = 1,375,000 GB
- 1,400 TB = 1,400,000 GB
- 1,425 TB = 1,425,000 GB
- 1,450 TB = 1,450,000 GB
- 1,475 TB = 1,475,000 GB
- 1,500 TB = 1,500,000 GB
- 1,525 TB = 1,525,000 GB
- 1,550 TB = 1,550,000 GB
- 1,575 TB = 1,575,000 GB
- 1,600 TB = 1,600,000 GB
- 1,625 TB = 1,625,000 GB
- 1,650 TB = 1,650,000 GB
- 1,675 TB = 1,675,000 GB
- 1,700 TB = 1,700,000 GB
- 1,725 TB = 1,725,000 GB
- 1,750 TB = 1,750,000 GB
- 1,775 TB = 1,775,000 GB
- 1,800 TB = 1,800,000 GB
- 1,825 TB = 1,825,000 GB
- 1,850 TB = 1,850,000 GB
- 1,875 TB = 1,875,000 GB
- 1,900 TB = 1,900,000 GB
- 1,925 TB = 1,925,000 GB
- 1,950 TB = 1,950,000 GB
- 1,975 TB = 1,975,000 GB
- 2,000 TB = 2,000,000 GB
- 2,050 TB = 2,050,000 GB
- 2,100 TB = 2,100,000 GB
- 2,150 TB = 2,150,000 GB
- 2,200 TB = 2,200,000 GB
- 2,250 TB = 2,250,000 GB
- 2,300 TB = 2,300,000 GB
- 2,350 TB = 2,350,000 GB
- 2,400 TB = 2,400,000 GB
- 2,450 TB = 2,450,000 GB
- 2,500 TB = 2,500,000 GB
- 2,550 TB = 2,550,000 GB
- 2,600 TB = 2,600,000 GB
- 2,650 TB = 2,650,000 GB
- 2,700 TB = 2,700,000 GB
- 2,750 TB = 2,750,000 GB
- 2,800 TB = 2,800,000 GB
- 2,850 TB = 2,850,000 GB
- 2,900 TB = 2,900,000 GB
- 2,950 TB = 2,950,000 GB
- 3,000 TB = 3,000,000 GB
- 3,050 TB = 3,050,000 GB
- 3,100 TB = 3,100,000 GB
- 3,150 TB = 3,150,000 GB
- 3,200 TB = 3,200,000 GB
- 3,250 TB = 3,250,000 GB
- 3,300 TB = 3,300,000 GB
- 3,350 TB = 3,350,000 GB
- 3,400 TB = 3,400,000 GB
- 3,450 TB = 3,450,000 GB
- 3,500 TB = 3,500,000 GB
- 3,550 TB = 3,550,000 GB
- 3,600 TB = 3,600,000 GB
- 3,650 TB = 3,650,000 GB
- 3,700 TB = 3,700,000 GB
- 3,750 TB = 3,750,000 GB
- 3,800 TB = 3,800,000 GB
- 3,850 TB = 3,850,000 GB
- 3,900 TB = 3,900,000 GB
- 3,950 TB = 3,950,000 GB
- 4,000 TB = 4,000,000 GB
- 4,050 TB = 4,050,000 GB
- 4,100 TB = 4,100,000 GB
- 4,150 TB = 4,150,000 GB
- 4,200 TB = 4,200,000 GB
- 4,250 TB = 4,250,000 GB
- 4,300 TB = 4,300,000 GB
- 4,350 TB = 4,350,000 GB
- 4,400 TB = 4,400,000 GB
- 4,450 TB = 4,450,000 GB
- 4,500 TB = 4,500,000 GB
- 4,550 TB = 4,550,000 GB
- 4,600 TB = 4,600,000 GB
- 4,650 TB = 4,650,000 GB
- 4,700 TB = 4,700,000 GB
- 4,750 TB = 4,750,000 GB
- 4,800 TB = 4,800,000 GB
- 4,850 TB = 4,850,000 GB
- 4,900 TB = 4,900,000 GB
- 4,950 TB = 4,950,000 GB
- 5,000 TB = 5,000,000 GB
- 5,100 TB = 5,100,000 GB
- 5,200 TB = 5,200,000 GB
- 5,300 TB = 5,300,000 GB
- 5,400 TB = 5,400,000 GB
- 5,500 TB = 5,500,000 GB
- 5,600 TB = 5,600,000 GB
- 5,700 TB = 5,700,000 GB
- 5,800 TB = 5,800,000 GB
- 5,900 TB = 5,900,000 GB
- 6,000 TB = 6,000,000 GB
- 6,100 TB = 6,100,000 GB
- 6,200 TB = 6,200,000 GB
- 6,300 TB = 6,300,000 GB
- 6,400 TB = 6,400,000 GB
- 6,500 TB = 6,500,000 GB
- 6,600 TB = 6,600,000 GB
- 6,700 TB = 6,700,000 GB
- 6,800 TB = 6,800,000 GB
- 6,900 TB = 6,900,000 GB
- 7,000 TB = 7,000,000 GB
- 7,100 TB = 7,100,000 GB
- 7,200 TB = 7,200,000 GB
- 7,300 TB = 7,300,000 GB
- 7,400 TB = 7,400,000 GB
- 7,500 TB = 7,500,000 GB
- 7,600 TB = 7,600,000 GB
- 7,700 TB = 7,700,000 GB
- 7,800 TB = 7,800,000 GB
- 7,900 TB = 7,900,000 GB
- 8,000 TB = 8,000,000 GB
- 8,100 TB = 8,100,000 GB
- 8,200 TB = 8,200,000 GB
- 8,300 TB = 8,300,000 GB
- 8,400 TB = 8,400,000 GB
- 8,500 TB = 8,500,000 GB
- 8,600 TB = 8,600,000 GB
- 8,700 TB = 8,700,000 GB
- 8,800 TB = 8,800,000 GB
- 8,900 TB = 8,900,000 GB
- 9,000 TB = 9,000,000 GB
- 9,100 TB = 9,100,000 GB
- 9,200 TB = 9,200,000 GB
- 9,300 TB = 9,300,000 GB
- 9,400 TB = 9,400,000 GB
- 9,500 TB = 9,500,000 GB
- 9,600 TB = 9,600,000 GB
- 9,700 TB = 9,700,000 GB
- 9,800 TB = 9,800,000 GB
- 9,900 TB = 9,900,000 GB
- 10,000 TB = 10,000,000 GB
規格 IEC 80000-13 は、キロバイト、メガバイト、ギガバイト、テラバイトに 10 進の接頭辞を、キビバイト、メビバイト、ギビバイト、テビバイトに 2 進の接頭辞を割り当てています。 算出方法と出典.
よくある質問
1 TB のドライブが 931 GB と表示されるのはなぜですか？
製造元は 1 TB を 10¹² バイトと数えます。Windows はその数を 2⁴⁰ で割り、結果を TB と表示しますが実際はテビバイトです。画面には 0.909 TB、つまり 931 GB と出ます。容量は変わっておらず、定義が違うだけです。
1 TB に映画は何本入りますか？
1080p で 1 本 4 GB ならおよそ 250 本、4K で 20 GB ならおよそ 50 本です。5 MB のスマートフォン写真なら 20 万枚ほどになります。
1 TB と 2 TB のどちらを選ぶべきですか？
事務作業と写真なら 1 TB で十分です。動画編集、1 本 100 GB の最近のゲーム、ローカルバックアップを行うなら 2 TB 以上が妥当です。容量が増えるほどテラバイト単価は下がるので、価格差が倍になることはまれです。
1 TB の SSD には 1,000 GB 以上のメモリーが載っていますか？
ほぼ必ず載っています。チップには 1,024 GiB のフラッシュ、つまり 10 進で 1,099 GB があり、外に見せるのは 1,000 GB だけです。差の 9 % は予備領域で、摩耗したブロックの置き換え、書き込みの分散、ガベージコレクションの吸収に使われます。業務用モデルでは予備がチップの 4 分の 1 に達し、960 GB ではなく 800 GB として売られるのはそのためです。
動画編集がテラバイト単位になるのはなぜですか？
撮影用のコーデックがほとんど圧縮しないからです。ProRes 422 HQ の 4K・毎秒 25 コマはおよそ 590 Mb/s、1 時間で 265 GB 近くになり、4 時間に満たない素材で 1 テラバイトが埋まります。同じ作品を H.265 の 15 Mb/s で書き出せば 1 時間 7 GB、40 分の 1 です。容量を決めるのは長さではなく元の形式です。
1 TBは何GBですか。
メーカーと同じく千で数えれば1000 GBです。Windowsは1024で割ってなおGBと書くので、同じディスクがそちらでは931 GBと表示されます。減ったものはありません。二つの数字は同じバイトを数えています。