# Megabytes to Mebibytes (MB to MiB)

> Convert megabytes to mebibytes: 1 MB = 0.953674 MiB. Exact conversion factor, formula, 18-row table and worked examples, with JSON API and MCP access.

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

## Formula

- `1 MB = 0.953674 MiB`
- `mebibytes = megabytes × 0.9536743164`
- Reverse: `megabytes = mebibytes × 1.048576`

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 MB = 1.43051 MiB
- 700 MB = 667.572 MiB
- 2048 MB = 1953.13 MiB

## Conversion table

| Megabytes (MB) | Mebibytes (MiB) |
| --- | --- |
| 1 | 0.953674 |
| 2 | 1.90735 |
| 4 | 3.8147 |
| 8 | 7.62939 |
| 16 | 15.2588 |
| 32 | 30.5176 |
| 64 | 61.0352 |
| 100 | 95.3674 |
| 128 | 122.07 |
| 256 | 244.141 |
| 500 | 476.837 |
| 512 | 488.281 |
| 1000 | 953.674 |
| 1024 | 976.563 |
| 2048 | 1953.13 |
| 4096 | 3906.25 |
| 8192 | 7812.5 |
| 10000 | 9536.74 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=1.5&from_unit=MB&to_unit=MiB` → 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":"MB","to_unit":"MiB"}`
- 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 mebibytes are in one megabyte?**

1 MB = 0.953674 MiB. 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 megabytes to mebibytes?**

Multiply the value in megabytes by 0.9536743164: mebibytes = megabytes × 0.9536743164. For example, 1.5 MB = 1.43051 MiB.

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

Multiply by the inverse factor 1.048576 (megabytes = mebibytes × 1.048576), or use the mebibytes-to-megabytes page.

## Related conversions

- [Mebibytes to megabytes](https://tttkmbb.com/conversion/mib-to-mb.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)
- [Gibibytes to Gigabytes](https://tttkmbb.com/conversion/gib-to-gb.md)
- [Gigabytes to Gibibytes](https://tttkmbb.com/conversion/gb-to-gib.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)