# Gigabits to Gigabytes (Gbit to GB)

> Convert gigabits to gigabytes: 1 Gbit = 0.125 GB. Exact conversion factor, formula, 18-row table and worked examples, with JSON API and MCP access.

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

## Formula

- `1 Gbit = 0.125 GB`
- `gigabytes = gigabits × 0.125`
- Reverse: `gigabits = gigabytes × 8`

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 Gbit = 0.1875 GB
- 700 Gbit = 87.5 GB
- 2048 Gbit = 256 GB

## Conversion table

| Gigabits (Gbit) | Gigabytes (GB) |
| --- | --- |
| 1 | 0.125 |
| 2 | 0.25 |
| 4 | 0.5 |
| 8 | 1 |
| 16 | 2 |
| 32 | 4 |
| 64 | 8 |
| 100 | 12.5 |
| 128 | 16 |
| 256 | 32 |
| 500 | 62.5 |
| 512 | 64 |
| 1000 | 125 |
| 1024 | 128 |
| 2048 | 256 |
| 4096 | 512 |
| 8192 | 1024 |
| 10000 | 1250 |

## API

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

1 Gbit = 0.125 GB. 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 gigabits to gigabytes?**

Multiply the value in gigabits by 0.125: gigabytes = gigabits × 0.125. For example, 1.5 Gbit = 0.1875 GB.

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

Multiply by the inverse factor 8 (gigabits = gigabytes × 8), or use the gigabytes-to-gigabits page.

## Related conversions

- [Gigabytes to gigabits](https://tttkmbb.com/conversion/gb-to-gigabits.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)