How many kilobytes in a megabyte and how many megabytes in a gigabyte?

1000 kilobytes are in a megabyte and 1000 megabytes are in a gigabyte.

These are the storage industry standards.

However, megabytes as displayed by an operating system are actually measured in binary form, thus 1,024 kilobytes are in one megabyte, and 1,024 megabytes are in a gigabyte.

There are 1,048,576 bytes in a megabyte, and 1,0458,576 kilobytes in a gigabyte.

This is one reason why your operating system will claim that there is less memory on your hard drive than what the manufacturer claims.