What is the most accurate way to estimate how big a database would be with the following characteristics:

* MySQL
* 1 Table with three columns:
	+ id --> big int)
	+ field1 --> varchar 32
	+ field2 --> char 32
* there is an index on field2

You can assume varchar 32 is fully populated (all 32 characters). How big would it be if each field is populated and there are:

1. 1 Million rows
2. 5 Million rows
3. 1 Billion rows
4. 5 Billion rows

My rough estimate works out to: 1 byte for id, 32 bits each for the other two fields. Making it roughly:

```
  1 + 32 + 32 = 65 * 1 000 000 = 65 million bytes for 1 million rows
= 62 Megabyte

```

Therefore:

1. 62 Mb
2. 310 Mb
3. 310 000 Mb = +- 302Gb
4. 1 550 000 Mb = 1513 Gb

Is this an accurate estimation?