How to convert megabytes to kilobytes
To convert megabytes (MB) to kilobytes (KB), multiply the value in megabytes by 1,000.
KB = MB × 1,000 (decimal)
KB = MB × 1,024 (binary)
Example: 5 MB = 5,000 KB, or 5,120 KB in binary.
Decimal (SI) counting steps by 1,000 and is what drive makers, macOS and phones use. Binary counting steps by 1,024 and is what Windows and RAM use; its unambiguous IEC names are KiB, MiB and GiB. Bits are decimal either way.
You can also type 5 MB to KB into the smart calculator, or mix units: 1 MB + 1 KB.
Megabytes to Kilobytes conversion table
| Megabytes | Kilobytes (decimal) | Kilobytes (binary) |
|---|---|---|
| 0.01 MB | 10 KB | 10.24 KB |
| 0.1 MB | 100 KB | 102.4 KB |
| 0.25 MB | 250 KB | 256 KB |
| 0.5 MB | 500 KB | 512 KB |
| 1 MB | 1,000 KB | 1,024 KB |
| 2 MB | 2,000 KB | 2,048 KB |
| 3 MB | 3,000 KB | 3,072 KB |
| 4 MB | 4,000 KB | 4,096 KB |
| 5 MB | 5,000 KB | 5,120 KB |
| 6 MB | 6,000 KB | 6,144 KB |
| 7 MB | 7,000 KB | 7,168 KB |
| 8 MB | 8,000 KB | 8,192 KB |
| 9 MB | 9,000 KB | 9,216 KB |
| 10 MB | 10,000 KB | 10,240 KB |
| 12 MB | 12,000 KB | 12,288 KB |
| 15 MB | 15,000 KB | 15,360 KB |
| 20 MB | 20,000 KB | 20,480 KB |
| 25 MB | 25,000 KB | 25,600 KB |
| 30 MB | 30,000 KB | 30,720 KB |
| 40 MB | 40,000 KB | 40,960 KB |
| 50 MB | 50,000 KB | 51,200 KB |
| 60 MB | 60,000 KB | 61,440 KB |
| 75 MB | 75,000 KB | 76,800 KB |
| 100 MB | 100,000 KB | 102,400 KB |
| 250 MB | 250,000 KB | 256,000 KB |
| 500 MB | 500,000 KB | 512,000 KB |
| 1,000 MB | 1,000,000 KB | 1,024,000 KB |
Converting kilobytes back to megabytes
1 KB = 0.001 MB. See the Kilobytes to Megabytes converter, or press the swap button above.
About the units
Megabyte (MB)
In decimal mode 1,000,000 bytes (1,000 KB); in binary mode 1,048,576 bytes (1,024 KB).
Kilobyte (KB)
In decimal (SI) mode 1,000 bytes; in binary mode 1,024 bytes, as Windows and RAM count. The unambiguous binary name is kibibyte (KiB).
Digital storage is counted in bits and bytes (1 byte = 8 bits). There are two ways to count bytes. Decimal (SI) prefixes step by 1,000: 1 KB = 1,000 B and 1 GB = 1,000 MB, which is how drive makers, macOS, iOS and Android report sizes. Binary prefixes step by 1,024: 1 KB = 1,024 B and 1 GB = 1,024 MB, which is how Windows and RAM count (the IEC names for these are KiB, MiB and GiB). Bits are always decimal: 1 Kb = 1,000 b.
Questions and answers
How many kilobytes are in a megabyte?
One megabyte (MB) equals 1,000 kilobytes in decimal (SI) counting, or 1,024 kilobytes in binary counting (1 KB = 1,024 B), which Windows uses.
How do I convert megabytes to kilobytes?
To convert megabytes to kilobytes, multiply the value in megabytes by 1,000. The formula is KB = MB × 1,000. For example, 5 MB = 5,000 KB.
What is 5 MB in KB?
5 megabytes is 5,000 kilobytes.
Which is bigger, a megabyte or a kilobyte?
A megabyte is bigger: 1 MB = 1,000 KB.
Is 1 GB equal to 1,000 MB or 1,024 MB?
Both are in use. In decimal (SI) counting, which drive makers, macOS, iOS and Android use, 1 GB = 1,000 MB. In binary counting, which Windows and RAM use, 1 GB = 1,024 MB; the unambiguous IEC name for that size is the gibibyte (GiB). ConvertEasy has a Decimal / Binary switch so KB, MB, GB and TB follow whichever you need, while KiB, MiB and GiB are always binary.
Are kilobits 1,000 or 1,024 bits?
ConvertEasy treats bits as decimal in both modes: 1 Kb = 1,000 b, 1 Mb = 1,000 Kb. A byte is always 8 bits, so only byte units (KB, MB, GB…) change with the switch.
Does this MB to KB converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.