Home › Unit Conversion › Pounds-force to Kilonewtons
Pounds-force to Kilonewtons (lbf to kN)
Convert pounds-force to kilonewtons: 1 lbf = 0.00444822 kN. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 lbf = 0.00444822 kN
kilonewtons = pounds-force × 0.004448221615 — reverse: pounds-force = kilonewtons × 224.8089431
The factor is derived from the SI definitions of both units (base unit: N) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.
Worked examples
- 5 lbf = 0.0222411 kN
- 12.5 lbf = 0.0556028 kN
- 100 lbf = 0.444822 kN
Pounds-force to kilonewtons conversion table
| Pounds-force (lbf) | Kilonewtons (kN) |
|---|---|
| 1 | 0.00444822 |
| 2 | 0.00889644 |
| 3 | 0.0133447 |
| 4 | 0.0177929 |
| 5 | 0.0222411 |
| 6 | 0.0266893 |
| 7 | 0.0311376 |
| 8 | 0.0355858 |
| 9 | 0.040034 |
| 10 | 0.0444822 |
| 15 | 0.0667233 |
| 20 | 0.0889644 |
| 25 | 0.111206 |
| 30 | 0.133447 |
| 40 | 0.177929 |
| 50 | 0.222411 |
| 75 | 0.333617 |
| 100 | 0.444822 |
| 200 | 0.889644 |
| 250 | 1.11206 |
| 500 | 2.22411 |
| 1000 | 4.44822 |
FAQ
How many kilonewtons are in one pound-force?
1 lbf = 0.00444822 kN. 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 pounds-force to kilonewtons?
Multiply the value in pounds-force by 0.004448221615: kilonewtons = pounds-force × 0.004448221615. For example, 5 lbf = 0.0222411 kN.
How do I convert kilonewtons back to pounds-force?
Multiply by the inverse factor 224.8089431 (pounds-force = kilonewtons × 224.8089431), or use the kilonewtons-to-pounds-force page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=lbf&to_unit=kN - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"lbf","to_unit":"kN"} - Markdown: https://tttkmbb.com/conversion/pound-force-to-kilonewtons.md · JSON: https://tttkmbb.com/conversion/pound-force-to-kilonewtons.json (add
?value=for a result) · Units: /api/v1/units?quantity=force - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.