Convert megabytes to kilobytes
Type a number of megabytes and read the result in kilobytes straight away. A megabyte is 1,024 kilobytes in the binary system, so the converter multiplies your value by 1,024. Use Swap order to convert kilobytes to megabytes instead.
Why convert megabytes to kilobytes?
A megabyte is larger than a kilobyte: 1 MB is 1,024 KB. File sizes are usually given in megabytes, but some systems, forms and limits expect a value in kilobytes — that is when you convert MB to KB.
The relationship is fixed: 1 MB is 1,024 KB in the binary system, which operating systems and this converter use. To turn megabytes into kilobytes, multiply their number by 1,024. The converter does this the moment you type a value.
Watch out for two systems. In the decimal system (SI), 1 MB is 1,000 KB — that is how storage makers count, for example. This converter uses the binary system (1,024 KB), matching what Windows and macOS show.
This tool computes both standards: binary (1,024) by default, and the Unit standard button switches it to decimal (1,000). Windows and RAM count in binary, while drive makers, macOS and search engines count in decimal — which is why the same capacity is quoted two different ways.
How does the megabytes to kilobytes conversion work? Formula and example
The conversion rests on a fixed relationship: one megabyte is 1,024 kilobytes. To turn megabytes into kilobytes, multiply their number by 1,024.
Full formula: kilobytes = megabytes × 1,024. The other way: megabytes = kilobytes ÷ 1,024.
Example: a file is 5 MB. Calculation: 5 × 1,024 = 5,120 KB. Likewise 25 MB is 25,600 KB, because each megabyte is made up of 1,024 kilobytes.
Which is bigger? The megabyte. 1 MB is 1,024 KB, so a 2 MB file is over two thousand times bigger than a 1 KB file. This is a common source of confusion when comparing sizes given in different units.
In Excel, type the formula =A1*1024 in a cell, where A1 holds the value in MB. The other way, kilobytes to megabytes, use =A1/1024.
Megabytes to kilobytes conversion table
The table below converts common megabyte values into kilobytes in the binary system (×1,024). To convert another value, use the converter above.
| Megabytes | Kilobytes |
|---|---|
| 0.5 MB | 512 KB |
| 1 MB | 1,024 KB |
| 2 MB | 2,048 KB |
| 5 MB | 5,120 KB |
| 10 MB | 10,240 KB |
| 15 MB | 15,360 KB |
| 20 MB | 20,480 KB |
| 25 MB | 25,600 KB |
| 50 MB | 51,200 KB |
| 100 MB | 102,400 KB |
| 500 MB | 512,000 KB |
| 1,024 MB | 1,048,576 KB |
Example: 1 MB × 1,024 = 1,024 KB. Want to convert kilobytes to megabytes? Click Swap order in the converter above.
The full data unit ladder: from smallest to largest
Every data size unit grows by the same multiplier: each one is 1,024 times larger than the previous. The table below shows the order from byte to petabyte, with a typical example of what each unit describes.
| Unit | Relationship | Typical example |
|---|---|---|
| Byte (B) | base unit | one character of text |
| Kilobyte (KB) | 1,024 B | a short email or icon |
| Megabyte (MB) | 1,024 KB | a photo or an MP3 song |
| Gigabyte (GB) | 1,024 MB | a movie or a RAM stick |
| Terabyte (TB) | 1,024 GB | a hard drive |
| Petabyte (PB) | 1,024 TB | a large data centre |
Order from smallest to largest: byte, kilobyte, megabyte, gigabyte, terabyte, petabyte. Each step is a multiplication by 1,024.
When do people most often convert megabytes to kilobytes?
You convert sizes in megabytes to kilobytes mostly for limits and comparisons.
Limits given in KB
Some CMS platforms, upload forms and config files state a size limit in kilobytes. When you know the size in megabytes, you convert it to KB, for example 2 MB is 2,048 KB.Comparing with small files
Icons, CSS and JSON files are counted in kilobytes, while photos and documents are in megabytes. Bringing them to kilobytes makes them easy to compare, for example 1 MB is 1,024 KB next to a 50 KB file.An exact size in KB
Sometimes an asset spec calls for a value in kilobytes. From a size of 10 MB you get exactly 10,240 KB, with no manual multiplication.Which is bigger: MB or KB
The converter shows plainly that the megabyte is bigger: 1 MB is 1,024 KB. This is the most common question when sizes are given in different units.
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Frequently asked questions about converting megabytes to kilobytes
How many KB are in 1 MB?
1 MB is 1,024 KB in the binary system, which this converter and operating systems use. In the decimal system (SI), used by storage makers among others, 1 MB is 1,000 KB.
Which is bigger, MB or KB?
The megabyte. 1 MB is 1,024 KB, so a megabyte is over a thousand times larger than a kilobyte. A 2 MB file is bigger than a 500 KB file, even though the number next to KB looks larger.
How much is 1 MB in KB?
1 MB is exactly 1,024 KB. Calculation: 1 × 1,024 = 1,024 KB. This is the base relationship between the megabyte and the kilobyte, which is why it is looked up most often.
How do you convert megabytes to kilobytes?
Multiply the number of megabytes by 1,024. For example, 50 MB × 1,024 = 51,200 KB. The converter does this the moment you type a value, with no button to click.
How many KB are 5, 25 and 100 MB?
5 MB is 5,120 KB, 25 MB is 25,600 KB, and 100 MB is 102,400 KB. You get each of these by multiplying the number of megabytes by 1,024.
How do you convert kilobytes to megabytes?
Divide the number of kilobytes by 1,024. For example, 5,120 KB ÷ 1,024 = 5 MB. Click Swap order to have the converter work in this direction.
Is 1 MB 1,000 or 1,024 KB?
It depends on the system. Operating systems and this converter use the binary system, where 1 MB is 1,024 KB. Storage makers use the decimal system, where 1 MB is 1,000 KB. That is why the same number of megabytes can give a slightly different result in kilobytes.
How do you convert MB to KB in Excel?
Type the formula =A1*1024 in a cell, where A1 holds the value in megabytes. The other way, kilobytes to megabytes, use =A1/1024. The same formula works in Google Sheets.
What is the order of the units from smallest to largest?
From smallest: byte (B), kilobyte (KB), megabyte (MB), gigabyte (GB), terabyte (TB), petabyte (PB). Each unit is 1,024 times larger than the previous one. A byte describes a single character, while a terabyte describes a drive capacity.
Have a question or suggestion?
If you have spotted an error in the table or have an idea to improve the converter, write to us. We reply to every message.