Convert Blocks to Bytes

Very easily 

=========== CONVERT FROM BYTES TO BLOCKS =========== 

For example:

100 Megabytes = 1024 x 1024 x 100

---------------------------------

1 Megabyte = 1024 x 1024 x 1

1 Kilobyte = 1024 x 1

1 Byte = 1

A block is a set quantity of bytes. For example, a mounted partition could have blocks of 4096 bytes or 4k.

Typically however, quotas will have a block size of 1024 bytes ( 1k ).

To calculate the quantity of blocks for quotas you should allocate blocks using the following formula:

Allocate 100Mb of space to a user:

1024 x 1024 x 100 = 104,857,600 (in bytes) = 100Mb

Divide the number of bytes by the block size:

Block size of 4096: 104,857,600 / 4096 = 25,600 blocks

Block size of 1024: 104,857,600 / 1024 = 102,400 blocks

25,600  blocks = 100Mb if your block size is 4096 (unlikely for quotas)

102,400 blocks = 100mb if your block size is 1024

=========== CONVERT FROM BLOCKS TO BYTES ===========

Now determine how many Megabytes a quota of 262144 blocks equals:

1) 262144 multiplied by the size of the blocks:

262144 x 1024 = 268,435,456 (number of total bytes)

2) Since we are dealing with megabytes, divide by 1024 x 1024

( 268,435,456 / 1048576 ) = 256