Why use this calculator
Understanding data storage sizes is important for choosing storage devices, managing cloud storage, and understanding file sizes.
How to use it
Enter a value and select the unit to convert from. All equivalent sizes are displayed.
The formula
Each level is 1024× the previous: 1 KB = 1024 B, 1 MB = 1024 KB, etc.
Worked examples
1 GB
1,024 MB, 1,048,576 KB, 1,073,741,824 bytes
When people use it
- Storage device comparison
- Cloud storage planning
- File size estimation
Tips
- Marketing often uses 1000-based (decimal) while computers use 1024-based (binary)
- 1 TB ≈ 1000 GB in marketing, but 1024 GB in computing
Questions people ask
- Why is my 1TB drive only showing 931 GB?
- Drive manufacturers use decimal (1 TB = 1,000 GB) while your OS uses binary (1 TB = 1,024 GB). 1,000,000,000,000 bytes / 1,073,741,824 = 931 GiB.