Data Size Converter
Convert a byte count to decimal and binary units (kB/MB and KiB/MiB).
Try a worked example
Try a worked example
Convert a byte count to decimal and binary units (kB/MB and KiB/MiB).
Check the units and options, then use the tool’s calculation button. The example is fictitious; replace its values for your own calculation.
Example input
- Byte count (whole number)
- 1048576
Expected output
Bytes: 1048576 Decimal: 1048.576 kB · 1.048576 MB · 0.001048576 GB Binary: 1024.000 KiB · 1.000000 MiB · 0.000976563 GiB
Show the entered byte count in decimal SI units (kB, MB, GB) and binary IEC units (KiB, MiB, GiB).
Waiting for the tool. The explanation remains available without JavaScript.
Method and limits
Enter a byte count and run the converter. It shows both decimal units (kB, MB, GB, using powers of 1000) and binary units (KiB, MiB, GiB, using powers of 1024). For example, 1 kB is 1,000 bytes, while 1 KiB is 1,024 bytes.
Decimal prefixes use powers of 1000; binary prefixes use powers of 1024. This is a unit conversion, not a prediction of usable disk capacity or a file-system report.
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Quick answer
Show the entered byte count in decimal SI units (kB, MB, GB) and binary IEC units (KiB, MiB, GiB).
The page and its assets load from the site; this operation uses your entered values only in this browser and does not send them to a calculation endpoint.
How to use it
Enter a byte count and run the converter. It shows both decimal units (kB, MB, GB, using powers of 1000) and binary units (KiB, MiB, GiB, using powers of 1024). For example, 1 kB is 1,000 bytes, while 1 KiB is 1,024 bytes.
Limits
Decimal prefixes use powers of 1000; binary prefixes use powers of 1024. This is a unit conversion, not a prediction of usable disk capacity or a file-system report.
Frequently asked questions
What is the difference between kB and KiB?
kB is decimal: 1 kB = 1,000 bytes. KiB is binary: 1 KiB = 1,024 bytes. The converter shows both systems side by side.
Does this show how much space a drive or file system can use?
No. It only converts the number you enter; it does not report file-system formatting, reserved space, or usable capacity.
Sources and references
These references document the cited standard or browser API; they do not validate the tool’s output.