Free File Size Converter
Convert file sizes between bytes, kilobytes, megabytes, gigabytes, and terabytes instantly. All units at once.
Free, no signup — enter a value, select the unit, and click Convert to see all conversions instantly in your browser.
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How to Convert File Sizes
Go from one unit to every unit in three steps.
Enter a Value
Type the number you want to convert — for example 2048.
Pick the Unit
Choose the starting unit: bytes, KB, MB, GB, or TB.
Read All Conversions
See the equivalent in every unit at once and copy any row you need.
1 GB equals
1,000 MB
1,000,000 KB
1,000,000,000 bytes
All Units at Once
Get conversions to B, KB, MB, GB, and TB simultaneously in a single click — no need to convert one unit at a time.
Any Starting Unit
Start from any unit — bytes, kilobytes, megabytes, gigabytes, or terabytes. The converter handles the math in both directions.
Copy Per Row
Copy any individual conversion result to your clipboard with one click, or download all results as a text report.
Frequently Asked Questions
How many bytes are in a kilobyte?
In decimal (SI) units, 1 KB = 1,000 bytes. In binary units, 1 KiB (kibibyte) = 1,024 bytes. Most operating systems and storage manufacturers use the decimal convention when reporting file sizes.
What is the difference between MB and MiB?
MB (megabyte) = 1,000,000 bytes. MiB (mebibyte) = 1,048,576 bytes (1024²). This tool uses the decimal (1 KB = 1,000 bytes) convention, which is the most common for file size display.
How large is a terabyte?
1 TB = 1,000 GB = 1,000,000 MB = 1,000,000,000 KB = 1,000,000,000,000 bytes. Modern hard drives and SSDs are commonly sold in terabyte capacities.
Why does my file look smaller in MB than in MiB?
Because decimal MB divides by 1,000 while binary MiB divides by 1,024. A 1,048,576-byte file is exactly 1 MiB but about 1.05 MB. This converter shows the decimal value used by most file managers.
Is the File Size Converter free?
Yes. It is completely free with no signup, and every conversion runs instantly in your browser.
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