Data Size Converter — Bytes, KB, MB, GB Online Free | GadgetSurge

About Data Size Converter

Storage sizes are confusing because two competing standards exist. Binary units (KiB, MiB, GiB) use base 1024 — common in operating systems and memory specs. Decimal units (KB, MB, GB) use base 1000 — common in hard drive marketing and network bandwidth.

This converter lets you explicitly choose which system you are working in, then convert between any supported units. The exact value is always shown alongside a sensibly rounded result.

Understanding the binary vs decimal distinction prevents costly mistakes — a "1 TB" drive shows ~931 GiB in your OS because 1 terabyte (decimal) equals roughly 0.909 tebibytes (binary).

All calculations use JavaScript floating-point arithmetic and run entirely in your browser.

How to Use Data Size Converter

1. Enter the numeric value on the first line.
2. Enter the source unit on the second line (e.g. MiB or GB).
3. Enter the target unit on the third line.
4. Optionally add "binary" or "decimal" on the fourth line to select the unit system.
5. Click "Convert Size" to see the result with exact precision.

Common Use Cases

• Storage provisioning: Convert GiB requirements to TB when ordering cloud block storage billed in decimal units.
• Bandwidth estimation: Convert Mbps and file sizes to estimate download durations.
• Database sizing: Translate byte counts from pg_database_size() into human-readable GiB for capacity planning.
• Docker/K8s limits: Convert memory limits between MiB (Kubernetes) and MB (some monitoring dashboards).
• File upload validation: Verify that a 50 MiB upload limit equals approximately 52.4 MB in decimal terms.
• Backup capacity planning: Calculate total backup storage needed when source data is reported in mixed units.

Frequently Asked Questions

What is the difference between KB and KiB?

KB (kilobyte) is decimal: 1 KB = 1,000 bytes. KiB (kibibyte) is binary: 1 KiB = 1,024 bytes. The IEC introduced binary prefixes (KiB, MiB, GiB) to eliminate ambiguity.

Which system should I use?

Use binary (KiB/MiB/GiB) for RAM, file systems, and most OS-reported sizes. Use decimal (KB/MB/GB) for hard drive labels, network speeds, and SI-standard contexts.

What units are supported?

Binary: B, KiB, MiB, GiB, TiB. Decimal: B, KB, MB, GB, TB. Case is flexible for most units.

Why does 1000 GB not equal 1 TB in binary?

In decimal, 1000 GB = 1 TB exactly. In binary, 1 TB (decimal) ≈ 931 GiB because 1000³ / 1024³ ≈ 0.931.

How is rounding handled?

Results show a sensibly rounded primary value plus the full exact conversion on a secondary line for precision.

Can I convert between binary and decimal systems?

Pick the system that matches your input units. To cross systems, convert to bytes first by choosing the correct system, then convert again with the other system.