Free File Size Converter
Convert file sizes online for free. Enter a value, choose the starting unit and select the unit you want to convert to.
What Is a File Size Converter?
A file size converter changes a digital file size from one unit to another. You can convert bytes, kilobytes, megabytes, gigabytes and terabytes.
This tool makes it easier to compare storage limits, upload requirements and file sizes without doing the calculation manually.
How to Convert File Size Online
You can convert a file size in a few simple steps.
- Enter the file size you want to convert.
- Choose the original unit.
- Select the unit you need.
- Choose decimal or binary conversion.
- Click Convert File Size.
The result appears immediately below the converter. You can change the units and run another conversion whenever needed.
File Size Units Explained
Bytes
A byte is a basic unit used to measure digital data. Small files can be measured in bytes or kilobytes.
Kilobytes
A kilobyte is commonly written as KB. It is useful for smaller documents, images and other digital files.
Megabytes
A megabyte is written as MB. Photos, videos, applications and documents can often be measured in megabytes.
Gigabytes
A gigabyte is written as GB. Larger applications, videos, backups and storage devices commonly use gigabytes.
Terabytes
A terabyte is written as TB. It is commonly used for large storage capacities and extensive collections of digital files.
Decimal vs Binary File Size
File size calculations can use decimal or binary units. The two systems use different conversion factors, so their results can differ.
Decimal Conversion
In the decimal system, 1 KB equals 1,000 bytes. Therefore, 1 MB equals 1,000 KB and 1 GB equals 1,000 MB.
Binary Conversion
Binary calculations use powers of 1,024. For example, 1 KiB equals 1,024 bytes and 1 MiB equals 1,024 KiB.
The converter lets you select the system so you can use the calculation that matches your needs.
Common File Size Conversions
File size conversion is useful for many everyday calculations.
- Bytes to KB
- KB to MB
- MB to GB
- GB to MB
- MB to KB
- GB to TB
- TB to GB
- Bytes to MB
Why Use an Online File Size Converter?
Manual file size calculations can be confusing when different units are involved. An online converter gives you a quick way to check the result.
- No calculator software is required.
- You can convert several common file size units.
- Decimal and binary systems are available.
- The result appears instantly.
- The tool works on desktop and mobile browsers.
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Frequently Asked Questions
What is a file size converter?
A file size converter changes a value from one digital storage unit into another, such as converting MB to GB.
How do I convert KB to MB?
Enter the KB value, select KB as the original unit and choose MB as the target unit. Then click Convert File Size.
How do I convert MB to GB?
Enter the MB value and select GB as the target unit. The converter will calculate the result using your selected conversion system.
What is the difference between decimal and binary file sizes?
Decimal units use factors of 1,000, while binary units use factors of 1,024. This difference can produce different conversion results.
Is this file size converter free?
Yes. You can use the converter to calculate common file size conversions for free.
Can I use the converter on mobile?
Yes. The responsive layout works on modern desktop, tablet and mobile browsers.
Does this tool upload my files?
No file upload is needed. You only enter a file size value, so the calculation can happen directly in your browser.