# Mebibytes to Megabytes (MiB to MB)

> Convert mebibytes to megabytes: 1 MiB = 1.04858 MB. Exact conversion factor, formula, 18-row table and worked examples, with JSON API and MCP access.

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

## Formula

- `1 MiB = 1.04858 MB`
- `megabytes = mebibytes × 1.048576`
- Reverse: `mebibytes = megabytes × 0.9536743164`

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 MiB = 1.57286 MB
- 700 MiB = 734.003 MB
- 2048 MiB = 2147.48 MB

## Conversion table

| Mebibytes (MiB) | Megabytes (MB) |
| --- | --- |
| 1 | 1.04858 |
| 2 | 2.09715 |
| 4 | 4.1943 |
| 8 | 8.38861 |
| 16 | 16.7772 |
| 32 | 33.5544 |
| 64 | 67.1089 |
| 100 | 104.858 |
| 128 | 134.218 |
| 256 | 268.435 |
| 500 | 524.288 |
| 512 | 536.871 |
| 1000 | 1048.58 |
| 1024 | 1073.74 |
| 2048 | 2147.48 |
| 4096 | 4294.97 |
| 8192 | 8589.93 |
| 10000 | 10485.8 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=1.5&from_unit=MiB&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":"MiB","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 mebibyte?**

1 MiB = 1.04858 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 mebibytes to megabytes?**

Multiply the value in mebibytes by 1.048576: megabytes = mebibytes × 1.048576. For example, 1.5 MiB = 1.57286 MB.

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

Multiply by the inverse factor 0.9536743164 (mebibytes = megabytes × 0.9536743164), or use the megabytes-to-mebibytes page.

## Related conversions

- [Megabytes to mebibytes](https://tttkmbb.com/conversion/mb-to-mib.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)