How many terabytes are in one petabyte?

There are 1000 terabytes (TB) in a petabyte (PB). There is an older definition based on multiples of 1024 instead of 1000, but this was changed, and tebibytes and pebibyte are the ones based on multiples of 1024.

Computer Manufactures consider it being 1000. But the OS will say 1024 (due to the binary numbering).

Here is the memory ladder according to computer manufactures

• 8 bits= 1 Byte
• 1000 bytes= 1 Kilobyte
• 1000 Kilobytes= 1 Megabyte
• 1000 Megabytes= 1 Gigabyte
• 1000 Gigabytes= 1 Terabyte
• 1000 Terabytes= 1 Petabyte
• 1000 Petabytes= 1 Exabyte
• 1000 Exabytes= 1 Zettabyte
• 1000 Zettabytes= 1 Yottabyte

Here it is according to binary prefix and the older numbering system:

• 8 bits= 1 Byte
• 1024 bytes= 1 Kilobyte
• 1024 Kilobytes= 1 Megabyte (1 048 576 bytes)
• 1024 Megabytes= 1 Gigabyte (1 073 741 824 bytes)
• 1024 Gigabytes= 1 Terabyte
• 1024 Terabytes= 1 Petabyte
• 1024 Petabytes= 1 Exabyte
• 1024 Exabytes= 1 Zettabyte
• 1024 Zettabytes= 1 Yottabyte