# Bytes to Kilobytes (B to KB)

> Convert bytes to kilobytes: 1 B = 0.001 KB. Exact conversion factor, formula, 18-row table and worked examples, with JSON API and MCP access.

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

## Formula

- `1 B = 0.001 KB`
- `kilobytes = bytes × 0.001`
- Reverse: `bytes = kilobytes × 1000`

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 = 0.0015 KB
- 700 B = 0.7 KB
- 2048 B = 2.048 KB

## Conversion table

| Bytes (B) | Kilobytes (KB) |
| --- | --- |
| 1 | 0.001 |
| 2 | 0.002 |
| 4 | 0.004 |
| 8 | 0.008 |
| 16 | 0.016 |
| 32 | 0.032 |
| 64 | 0.064 |
| 100 | 0.1 |
| 128 | 0.128 |
| 256 | 0.256 |
| 500 | 0.5 |
| 512 | 0.512 |
| 1000 | 1 |
| 1024 | 1.024 |
| 2048 | 2.048 |
| 4096 | 4.096 |
| 8192 | 8.192 |
| 10000 | 10 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=1.5&from_unit=B&to_unit=KB` → 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":"KB"}`
- 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 kilobytes are in one byte?**

1 B = 0.001 KB. 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 kilobytes?**

Multiply the value in bytes by 0.001: kilobytes = bytes × 0.001. For example, 1.5 B = 0.0015 KB.

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

Multiply by the inverse factor 1000 (bytes = kilobytes × 1000), or use the kilobytes-to-bytes page.

## Related conversions

- [Kilobytes to bytes](https://tttkmbb.com/conversion/kb-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)