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File Size Converter
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Convert file sizes between bytes, KB, MB, GB, TB, and PB in both decimal (÷1000) and binary (÷1024) modes. Free, instant, no signup.
SI — Decimal (powers of 1000)
Bytes (B)1,000,000
Kilobytes (KB)1,000
Megabytes (MB)1
Gigabytes (GB)0.001
Terabytes (TB)0.000001
Petabytes (PB)1.000000e-9
Decimal (SI) units are used in storage marketing — a "1 TB" drive is 1,000,000,000,000 bytes. Binary (IEC) units reflect actual memory addressing — 1 GiB = 1,073,741,824 bytes.
How to Convert File Sizes: Bytes, KB, MB, GB (2026)
How to Convert File Sizes: Bytes, KB, MB, GB — free online tool and guide with examples.