File Size Converter

Convert between file size units: bits, bytes, KB, KiB, MB, MiB, GB, GiB, TB, TiB.

Runs entirely in your browser — nothing is uploaded or stored on any server.

About File Size Converter

Updated Mar 2026

Convert file sizes across all common units: bits, bytes, kilobytes (KB/KiB), megabytes (MB/MiB), gigabytes (GB/GiB), and terabytes (TB/TiB). Clearly distinguishes SI units (base-10: 1 KB = 1000 B) from binary units (base-2: 1 KiB = 1024 B) per IEC 80000-13. Includes common presets for CD, DVD, Blu-ray, and storage sector sizes.

Frequently Asked Questions

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