# Kilograms-force to Pounds-force (kgf to lbf)

> Convert kilograms-force to pounds-force: 1 kgf = 2.20462 lbf. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

- Page id: `kgf-to-pound-force` · Quantity: Force (`force`, base unit N) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/kgf-to-pound-force · This document: https://tttkmbb.com/conversion/kgf-to-pound-force.md · JSON: https://tttkmbb.com/conversion/kgf-to-pound-force.json (add `?value=` for a result)

## Formula

- `1 kgf = 2.20462 lbf`
- `pounds-force = kilograms-force × 2.204622622`
- Reverse: `kilograms-force = pounds-force × 0.45359237`

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

- 5 kgf = 11.0231 lbf
- 12.5 kgf = 27.5578 lbf
- 100 kgf = 220.462 lbf

## Conversion table

| Kilograms-force (kgf) | Pounds-force (lbf) |
| --- | --- |
| 1 | 2.20462 |
| 2 | 4.40925 |
| 3 | 6.61387 |
| 4 | 8.81849 |
| 5 | 11.0231 |
| 6 | 13.2277 |
| 7 | 15.4324 |
| 8 | 17.637 |
| 9 | 19.8416 |
| 10 | 22.0462 |
| 15 | 33.0693 |
| 20 | 44.0925 |
| 25 | 55.1156 |
| 30 | 66.1387 |
| 40 | 88.1849 |
| 50 | 110.231 |
| 75 | 165.347 |
| 100 | 220.462 |
| 200 | 440.925 |
| 250 | 551.156 |
| 500 | 1102.31 |
| 1000 | 2204.62 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=kgf&to_unit=lbf` → unified JSON envelope with `result.values.result`, `formula`, `factor`, `sources`, `freshness`
- MCP: server `https://tttkmbb.com/mcp`, tool `convert_units` with `{"value":5,"from_unit":"kgf","to_unit":"lbf"}`
- All force units: https://tttkmbb.com/api/v1/units?quantity=force · full converter: [Force Converter](https://tttkmbb.com/conversion/force.md)
- Authentication: none. Freshness: `static` (fixed conversion factors).

## FAQ

**How many pounds-force are in one kilogram-force?**

1 kgf = 2.20462 lbf. 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 kilograms-force to pounds-force?**

Multiply the value in kilograms-force by 2.204622622: pounds-force = kilograms-force × 2.204622622. For example, 5 kgf = 11.0231 lbf.

**How do I convert pounds-force back to kilograms-force?**

Multiply by the inverse factor 0.45359237 (kilograms-force = pounds-force × 0.45359237), or use the pounds-force-to-kilograms-force page.

## Related conversions

- [Pounds-force to kilograms-force](https://tttkmbb.com/conversion/pound-force-to-kgf.md) (reverse)
- [Newtons to Pounds-force](https://tttkmbb.com/conversion/newtons-to-pound-force.md)
- [Pounds-force to Newtons](https://tttkmbb.com/conversion/pound-force-to-newtons.md)
- [Kilonewtons to Pounds-force](https://tttkmbb.com/conversion/kilonewtons-to-pound-force.md)
- [Pounds-force to Kilonewtons](https://tttkmbb.com/conversion/pound-force-to-kilonewtons.md)
- [Kilograms-force to Newtons](https://tttkmbb.com/conversion/kgf-to-newtons.md)
- [Newtons to Kilograms-force](https://tttkmbb.com/conversion/newtons-to-kgf.md)
- [Newtons to Dynes](https://tttkmbb.com/conversion/newtons-to-dynes.md)
- [Dynes to Newtons](https://tttkmbb.com/conversion/dynes-to-newtons.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)