How To Convert Data Sizes Calculator
Data sizes use two conventions that differ by about two and a half percent per step. A converter that offers both decimal and binary units shows exactly where the missing space on a drive goes.
Converted value
1,073,741,824
- Value in bytes
- 1,073,741,824
Values update as you type. This calculator covers the single scenario its formula assumes — see Common Mistakes for what it leaves out.
The formula this calculator uses
Result = value x from-factor / to-factor
- value
- Amount you start with
- from
- Size of the source unit in bytes
- to
- Size of the target unit in bytes
How to check the result by hand
- 1
Enter the amount
Type the data size you want to convert.
- 2
Pick the source unit
Choose the unit the value is currently in, such as gibibytes.
- 3
Pick the target unit
Choose the unit you want, such as bytes.
- 4
Multiply by the source factor
The value is expressed in bytes using the source unit's size.
- 5
Divide by the target factor
Converting from the base byte into the target unit gives the answer.
For worked examples, common mistakes and the limits of this formula, read the full How To Convert Data Sizes page.