# Gigabytes to Gibibytes (GB to GiB)

> Convert gigabytes to gibibytes: 1 GB = 0.931323 GiB. Exact conversion factor, formula, 18-row table and worked examples, with JSON API and MCP access.

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

## Formula

- `1 GB = 0.931323 GiB`
- `gibibytes = gigabytes × 0.9313225746`
- Reverse: `gigabytes = gibibytes × 1.073741824`

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 GB = 1.39698 GiB
- 700 GB = 651.926 GiB
- 2048 GB = 1907.35 GiB

## Conversion table

| Gigabytes (GB) | Gibibytes (GiB) |
| --- | --- |
| 1 | 0.931323 |
| 2 | 1.86265 |
| 4 | 3.72529 |
| 8 | 7.45058 |
| 16 | 14.9012 |
| 32 | 29.8023 |
| 64 | 59.6046 |
| 100 | 93.1323 |
| 128 | 119.209 |
| 256 | 238.419 |
| 500 | 465.661 |
| 512 | 476.837 |
| 1000 | 931.323 |
| 1024 | 953.674 |
| 2048 | 1907.35 |
| 4096 | 3814.7 |
| 8192 | 7629.39 |
| 10000 | 9313.23 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=1.5&from_unit=GB&to_unit=GiB` → 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":"GB","to_unit":"GiB"}`
- 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 gibibytes are in one gigabyte?**

1 GB = 0.931323 GiB. 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 gigabytes to gibibytes?**

Multiply the value in gigabytes by 0.9313225746: gibibytes = gigabytes × 0.9313225746. For example, 1.5 GB = 1.39698 GiB.

**How do I convert gibibytes back to gigabytes?**

Multiply by the inverse factor 1.073741824 (gigabytes = gibibytes × 1.073741824), or use the gibibytes-to-gigabytes page.

## Related conversions

- [Gibibytes to gigabytes](https://tttkmbb.com/conversion/gib-to-gb.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)