KB ↔ MB Converter
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Fast · Accurate · Pretty

Convert KB, MB, GB — SI (1000) or IEC (1024)

Paste a value, choose units, and get a clean, exact answer. Copy or swap in one click.

Clear

How to use

  1. Type a number in the Value field (e.g., 2048).
  2. Select From and To units (KB, MB, GB, TB, etc.).
  3. Choose the standard: SI (×1000) or IEC (×1024).
  4. Set Precision (decimal places), then press Convert.
  5. Use Copy result to copy the output; use ↕ Swap to flip units.
Tip: Press Tab to move between fields, then Enter to convert.
Example
2048 KB → MB : SI: 2.048 MB · IEC: 2 MiB
SI is common for device marketing; IEC is common in OS/RAM contexts.

Use as API (optional)

Want JSON? Call this page with ?api=1: 

curl "https://kbtombconverter.com/?api=1&value=2048&from=KB&to=MB&standard=iec"

Troubleshooting

FAQ

Most common questions about KB/MB conversion and this tool.
Difference between SI (×1000) and IEC (×1024)?
SI uses base 1000 (KB, MB, GB). IEC uses base 1024 (KiB, MiB, GiB). SI is more common in storage/device marketing; IEC is common for OS/RAM.
What’s the difference between bytes and bits?
Byte (B) = 8 bits (b). This tool converts byte-based units (B, KB, MB, GB, TB). If you need bits, multiply/divide by 8 (e.g., 1 MB = 8 Mb).
What does Precision do?
Precision controls the number of decimal places. Use higher precision for scientific/exact reporting; 2–4 is enough for quick checks.
Which units are supported?
B, KB, MB, GB, TB are supported. If you need PB or explicit KiB/MiB/GiB labels, they can be added later.
How to type comma values like 1,5?
The tool automatically converts comma to dot (1.5). You can paste 1,5 directly.
Is it free? Do you store any data?
This is a single-file PHP tool with no database—inputs are not stored. You can host it yourself for free.