# Bytes to Megabytes (B to MB)

> Convert bytes to megabytes: 1 B = 0.000001 MB. Exact conversion factor, formula, 18-row table and worked examples, with JSON API and MCP access.

- Page id: `bytes-to-mb` · Quantity: Data storage (`data-storage`, base unit B) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/bytes-to-mb · This document: https://tttkmbb.com/conversion/bytes-to-mb.md · JSON: https://tttkmbb.com/conversion/bytes-to-mb.json (add `?value=` for a result)

## Formula

- `1 B = 0.000001 MB`
- `megabytes = bytes × 0.000001`
- Reverse: `bytes = megabytes × 1000000`

The factor follows from the SI definitions of both units (NIST SP 811); values below are rounded to 6 significant figures, the API returns up to 12.

## Worked examples

- 1.5 B = 0.0000015 MB
- 700 B = 0.0007 MB
- 2048 B = 0.002048 MB

## Conversion table

| Bytes (B) | Megabytes (MB) |
| --- | --- |
| 1 | 0.000001 |
| 2 | 0.000002 |
| 4 | 0.000004 |
| 8 | 0.000008 |
| 16 | 0.000016 |
| 32 | 0.000032 |
| 64 | 0.000064 |
| 100 | 0.0001 |
| 128 | 0.000128 |
| 256 | 0.000256 |
| 500 | 0.0005 |
| 512 | 0.000512 |
| 1000 | 0.001 |
| 1024 | 0.001024 |
| 2048 | 0.002048 |
| 4096 | 0.004096 |
| 8192 | 0.008192 |
| 10000 | 0.01 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=1.5&from_unit=B&to_unit=MB` → unified JSON envelope with `result.values.result`, `formula`, `factor`, `sources`, `freshness`
- MCP: server `https://tttkmbb.com/mcp`, tool `convert_units` with `{"value":1.5,"from_unit":"B","to_unit":"MB"}`
- All data storage units: https://tttkmbb.com/api/v1/units?quantity=data-storage · full converter: [Data Storage Converter](https://tttkmbb.com/conversion/data-storage.md)
- Authentication: none. Freshness: `static` (fixed conversion factors).

## FAQ

**How many megabytes are in one byte?**

1 B = 0.000001 MB. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.

**What is the formula to convert bytes to megabytes?**

Multiply the value in bytes by 0.000001: megabytes = bytes × 0.000001. For example, 1.5 B = 0.0000015 MB.

**How do I convert megabytes back to bytes?**

Multiply by the inverse factor 1000000 (bytes = megabytes × 1000000), or use the megabytes-to-bytes page.

## Related conversions

- [Megabytes to bytes](https://tttkmbb.com/conversion/mb-to-bytes.md) (reverse)
- [Megabytes to Gigabytes](https://tttkmbb.com/conversion/mb-to-gb.md)
- [Gigabytes to Megabytes](https://tttkmbb.com/conversion/gb-to-mb.md)
- [Gigabytes to Terabytes](https://tttkmbb.com/conversion/gb-to-tb.md)
- [Terabytes to Gigabytes](https://tttkmbb.com/conversion/tb-to-gb.md)
- [Kilobytes to Megabytes](https://tttkmbb.com/conversion/kb-to-mb.md)
- [Megabytes to Kilobytes](https://tttkmbb.com/conversion/mb-to-kb.md)
- [Mebibytes to Megabytes](https://tttkmbb.com/conversion/mib-to-mb.md)
- [Megabytes to Mebibytes](https://tttkmbb.com/conversion/mb-to-mib.md)

## Data Sources

- NIST Special Publication 811 – Guide for the Use of the International System of Units (SI), Appendix B conversion factors — https://www.nist.gov/pml/special-publication-811 (standard, retrieved 2026-09-24)
- BIPM – The International System of Units (SI Brochure, 9th edition) — https://www.bipm.org/en/publications/si-brochure (standard, retrieved 2026-09-24)
- Wikipedia – Conversion of units — https://en.wikipedia.org/wiki/Conversion_of_units (reference, retrieved 2026-09-24)