Byte converter (KB, MB, GB, TB)
Convert between bytes, KB, MB, GB and TB, in decimal (1000) and binary (1024), and calculate download time.
Convert file sizes.
Everything happens on your device: nothing is uploaded to the internet.
Download time
Available in: 
Byte converter (KB, MB, GB, TB): what it is for
The converter turns file sizes between bytes, KB, MB, GB, TB, PB and bits, in the binary standard used by Windows or the decimal one used by drive manufacturers.
It also calculates how long it takes to download the file at your internet speed in Mb/s.
How to use
- Type the value and the unit.
- Choose binary or decimal.
- See every unit and the download time.
When to use it
- Understanding the real space on drives and flash drives.
- Planning uploads and downloads.
- Comparing internet and storage plans.
Frequently asked questions
Why does my 1 TB drive show up as 931 GB?
Manufacturers use the decimal standard (1 TB = 1,000,000,000,000 bytes), and Windows shows it in binary (1 GB = 1,073,741,824 bytes). It is the same space, counted in different ways.
What is the difference between MB and Mb?
MB (megabyte) measures file size. Mb (megabit) measures internet speed. 1 byte = 8 bits, so a 100 Mb/s connection downloads about 12.5 MB per second.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.