KB to MB Converter

• MB = kb ÷ 1,000 (decimal / SI standard)
• MiB (from KiB) = kb ÷ 1,024 (binary / IEC standard)
• Windows displays binary but labels it with the decimal name — the source of most confusion
• A perfectly round result on the binary divisor means the original number was binary
• The converter above handles every unit from bits to quettabytes

Frequently Asked Questions

How many KB are in 1 MB?

1,000 KB per MB in decimal (SI) units, or 1,024 KiB per MiB in binary units. Storage marketing uses decimal; RAM, Windows file properties, and most programming contexts use binary.

Is 2048 KB equal to 2 MB?

Exactly 2 MiB if those are binary kilobytes (2048 ÷ 1024), or 2.05 MB decimal (2048 ÷ 1000). Upload limits set at 2048 KB almost always mean the binary reading — the round number gives it away.

Which should I use for an upload-limit check?

Match the system enforcing the limit. PHP's upload_max_filesize and most server configs interpret K/M as binary (1024-based); cloud-storage quotas and drive sizes are decimal. When in doubt, stay ~5% under the limit and the distinction stops mattering.

Does this converter handle other units too?

Yes — the tool above converts between bits, bytes, KB, MB, GB, TB and beyond, in both decimal and binary systems, and includes transfer-time and storage-cost estimates.