KB means kilobytes. MB means megabytes. A megabyte contains far more data than a kilobyte.
Quick comparison
| Size | Approximate relationship |
|---|---|
| 500 KB | About half of 1 MB |
| 1 MB | About 1,024 KB |
| 2 MB | About 2,048 KB |
| 5 MB | About 5,120 KB |
Why the numbers are sometimes confusing
Computer systems do not always display file sizes the same way. Some use powers of 1,024, while others use powers of 1,000. Interfaces also round values, which is why a file may appear as “2 MB” in one place and a slightly different number somewhere else.
What matters for upload limits
The receiving portal makes the final decision. If it gives a strict limit, aim a little below that number rather than relying on rounded displays.
If your file is shown in MB and the limit is shown in KB, convert carefully before assuming it fits.
Use File Too Large
Enter the portal limit in MB or KB and let Ninjitzu compare it with your file.
Compare my file →FAQ
Which is bigger, KB or MB?
MB is bigger than KB. In binary-based file sizing, 1 MB is commonly treated as 1,024 KB.
Is 500 KB less than 1 MB?
Yes. 500 KB is roughly half of 1 MB.
Why do websites show slightly different file sizes?
Different systems may use decimal or binary conventions and may round the displayed number.