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Byte & Data Unit Converter

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Quick Reference — Common File Sizes

Average email
~75 KB
High-res photo
~5 MB
MP3 song (4 min)
~4 MB
1080p movie (2h)
~4.5 GB
4K movie (2h)
~20 GB
Windows 11 ISO
~5.2 GB
1 min 4K video
~375 MB
Slack message
~2 KB

What This Tool Does

Byte & Data Unit Converter is built for deterministic developer and agent workflows.

Convert between bytes, KB, MB, GB, TB with SI and binary standards — includes transfer time estimator.

Use How to Use for execution steps and FAQ for constraints, policies, and edge cases.

Last updated:

This tool is provided as-is for convenience. Output should be verified before use in any production or critical context.

Programmatic Access

Byte & Data Unit Converter is also callable as a free HTTP JSON API at https://aidevhub.io/api/byte-converter/ — GET with query parameters or POST with a JSON body, no authentication, CORS enabled, 50 requests/day per IP. Responses return { ok, tool, result, meta }. 

curl -s "https://aidevhub.io/api/byte-converter/?value=1048576&unit=B"

Machine-readable contract: /api/tool/byte-converter.json All API endpoints: /agents/ LLM site index: /llms.txt

Agent Invocation

Best Path For Builders

Dedicated API endpoint

Deterministic outputs, machine-safe contracts, and production-ready examples.

Dedicated API

https://aidevhub.io/api/byte-converter/

OpenAPI: https://aidevhub.io/api/openapi.yaml

GET /api/byte-converter/ GET byte-converter
POST /api/byte-converter/ POST byte-converter

Unified Runtime API

https://aidevhub.io/api/tools/run/?toolId=byte-converter&a=...

GET and POST are supported at /api/tools/run/ with identical validation and limits.

Limit: 30 req / 60s, input max 256 KB.

How to Use Byte & Data Unit Converter

  1. 1

    Enter value and select unit

    Type a number in the 'Value' field and choose source unit from dropdown (B, KB, MB, GB, KiB, MiB, GiB, etc.). Supports both SI (1000) and binary (1024) standards.

  2. 2

    Choose display mode

    Click 'SI' to show decimal units, 'Binary' for IEC units, or 'Both' to see all conversions. Results update instantly as you change values.

  3. 3

    View all unit conversions

    See results in all selected units (SI, binary, or both). Includes bits for transfer speeds. Precision settable (2-5 decimal places).

  4. 4

    Calculate transfer times

    For bits value, see how long it takes to transfer at common speeds (3G, 4G, WiFi, Ethernet, USB). Useful for network performance planning.

Frequently Asked Questions

What's the difference between MB and MiB?
MB (megabyte) = 1,000,000 bytes using the SI/decimal standard. MiB (mebibyte) = 1,048,576 bytes using the binary standard. Storage manufacturers use MB, while operating systems often report in MiB.
Why is my 1TB drive only showing 931GB?
Your drive has 1,000,000,000,000 bytes (1 TB decimal). Your OS displays in binary: 1,000,000,000,000 ÷ 1,073,741,824 = ~931 GiB. This tool shows both standards side by side.
How do I convert bits to bytes?
Divide bits by 8 to get bytes. This tool displays both bits and bytes simultaneously — useful when comparing network speeds (measured in bits) with file sizes (measured in bytes).
What's the transfer time calculator?
Enter a file size and select a connection speed (3G, 4G, WiFi, Gigabit, USB, etc.) to estimate how long the transfer would take. You can also enter a custom speed.
Is this tool free?
Free to use and runs entirely in your browser with no data collection. All calculations are performed client-side.