The petabyte is a multiple of the unit byte for digital information. The prefix peta indicates the fifth power of 1000 and means 1015 in the International System of Units (SI), and therefore 1 petabyte is one quadrillion (short scale) bytes, or 1 billiard (long scale) bytes or 1000 terabyte, or 1 000 000 gigabytes . The unit symbol for the petabyte is PB.
| gibibyte | tebibit | terabyte | exabit | kibibit | mebibyte | nibble | kilobyte |
|---|---|---|---|---|---|---|---|
| 1 | 0.0078125 | 0.0010737 | 8.589934592 × 10-9 | 8 388 608 | 1 024 | 2 147 483 648 | 1,073,741.824 |
| 128 | 1 | 0.1374390 | 1.099511627776 × 10-6 | 1 073 741 824 | 131 072 | 274 877 906 944 | 137,438,953.472 |
| 931.3225746 | 7.2759576 | 1 | 8.0 × 10-6 | 7 812 500 000 | 953,674.3164063 | 2 000 000 000 000 | 1 000 000 000 |
| 116,415,321.82693 | 909,494.7017729 | 125 000 | 1 | 9.765625 × 1014 | 119,209,289,550.78 | 2.5 × 1017 | 1.25 × 1014 |
| 1.1920928955078 × 10-7 | 9.3132257461548 × 10-10 | 1.28 × 10-10 | 1.024 × 10-15 | 1 | 0.0001221 | 256 | 0.128 |
| 0.0009766 | 7.62939453125 × 10-6 | 1.048576 × 10-6 | 8.388608 × 10-12 | 8 192 | 1 | 2 097 152 | 1,048.576 |
| 4.6566128730774 × 10-10 | 3.6379788070917 × 10-12 | 5.0 × 10-13 | 4.0 × 10-18 | 0.0039063 | 4.7683715820312 × 10-7 | 1 | 0.0005 |
| 9.3132257461548 × 10-7 | 7.2759576141834 × 10-9 | 1.0 × 10-9 | 8.0 × 10-15 | 7.8125 | 0.0009537 | 2 000 | 1 |
| 1 petabytes = 8.0E+15 bits |
| 2 petabytes = 1.6E+16 bits |
| 3 petabytes = 2.4E+16 bits |
| 4 petabytes = 3.2E+16 bits |
| 5 petabytes = 4.0E+16 bits |