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File Size Converter

Convert file sizes between bits, bytes, KB, MB, GB, TB and their binary KiB/MiB/GiB equivalents. Understand why your 1 TB drive shows 931 GiB.

KB/MB/GB use decimal (×1000, as drive makers do); KiB/MiB/GiB use binary (×1024, as operating systems do).

Result

953.6743164 MiB

1 GB = 953.6743164 MiB

About File Size Converter

The File Size Converter translates between bits, bytes and every common storage unit — KB, MB, GB, TB, PB and their binary counterparts KiB, MiB, GiB, TiB and PiB. It's the quick answer to questions like how many MB are in a GB, or why a '1 TB' drive shows up as 931 GiB.

The confusion comes from two measurement systems: drive manufacturers use decimal units (1 GB = 1,000³ bytes) while operating systems traditionally report binary units (1 GiB = 1,024³ bytes). This converter handles both, so you can translate marketing sizes into real capacity.

It also converts to and from bits — useful for relating download speeds (megabits) to file sizes (megabytes).

How to Use the File Size Converter

  1. Enter a value and choose its unit (say GB).
  2. Choose the target unit (say MiB) and read the result instantly.
  3. Use the swap button to reverse the conversion.

Features

  • Decimal (KB/MB/GB) and binary (KiB/MiB/GiB) units side by side
  • Bit conversions for bandwidth math
  • Covers bytes through petabytes
  • Instant, precise client-side conversion

Frequently Asked Questions

Why does my 1 TB drive show only 931 GB?

The drive really holds 1 trillion bytes (1 TB decimal), but Windows reports capacity in binary gibibytes while labeling them GB: 1,000,000,000,000 ÷ 1024³ ≈ 931 GiB. Nothing is missing.

What's the difference between Mbps and MB/s?

Mbps is megabits per second, MB/s is megabytes per second — 8 bits per byte, so a 100 Mbps connection downloads at most 12.5 MB/s.

Is the File Size Converter free?

Yes, the File Size Converter is completely free with no usage limits. No signup, no account and no installation required.

Does the File Size Converter work on mobile?

Yes. The File Size Converter is fully responsive and works in any modern browser on phones, tablets and desktops.

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