A megabyte is defined as 1,000 kilobytes under the decimal (storage-industry) convention used here.
How it works
Dividing kilobytes by 1,000 gives megabytes; multiplying megabytes by 1,000 gives kilobytes back. Type into either field and the other updates instantly.
What this does not include
This does not include the binary (1024-based) convention some operating systems use — for both conventions side by side, use this site’s full data storage converter instead.
How to use this calculator
- Enter a value in either kilobytes or megabytes — the other field fills in automatically.
Frequently asked questions
Where is this conversion most commonly needed?
Comparing small file sizes, email attachment limits, and data usage figures.
Is this the same as the site’s MB-to-GB calculator?
Same 1000-based decimal convention, just one step down the scale — kilobytes to megabytes instead of megabytes to gigabytes.
Why do file managers sometimes show different sizes for the same file?
Different software may use the decimal or binary convention for kilobytes and megabytes, causing the same file to display slightly different sizes.
