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Convert GB to MB

Convert data storage units instantly: bits, bytes, KB, MB, GB, TB and the binary KiB, MiB, GiB, TiB — with the 1000 vs 1024 distinction made explicit.

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Result

This page opens the data storage converter preset to gigabytes → megabytes. In decimal SI units one gigabyte is exactly 1,000 megabytes, so MB = GB × 1,000: a 1.5 GB update is 1,500 MB, and 0.25 GB is 250 MB.

The binary family behaves differently: 1 GiB equals 1,024 MiB, and many programs still display binary values under the shorter "GB"/"MB" labels. That mismatch — not data loss — is why the same file can show different numbers in different tools. To work in binary units, pick GiB and MiB in the selectors; the converter treats both conventions with exact factors.

This direction is handy when a mobile plan counts traffic in MB and you think in GB, when splitting a large archive into upload-size chunks, or when estimating how many megabytes of photos fill a given quota. Type the gigabyte value, hit Convert, and the megabyte equivalent appears with a copyable result line.

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Executed in Browser

Your files and inputs never leave this device. Processing runs completely offline. 100% Secure.

Accepted Formats & Rules

  • Ten units: bit, byte, KB, MB, GB, TB, KiB, MiB, GiB, TiB.
  • Exact factors: decimal units use powers of 1,000, binary units use powers of 1,024, and 1 byte = 8 bits.
  • One-click copy of the conversion result.

Key Benefits

✓ Covers both unit families in one place: decimal SI units (1 kB = 1,000 bytes) and binary IEC units (1 KiB = 1,024 bytes), so you can finally compare them directly.
✓ Every result comes with a reminder of the SI vs binary distinction — the exact reason a "1 TB" drive shows up as roughly 931 GiB in your operating system.
✓ Runs entirely in your browser: no upload, no account, and the math uses exact integer factors, not rounded approximations.

Use Cases

  • • Convert a download size from megabytes to gigabytes to see whether it fits into your remaining cloud storage quota.
  • • Check why a 1 TB drive shows up as roughly 931 GiB in Windows by converting between decimal (1000) and binary (1024) units.
  • • Translate a network speed quoted in bits into bytes to estimate the real download rate of a 100 Mbps connection.