Home › Unit Conversion › Pounds-force to Newtons
Pounds-force to Newtons (lbf to N)
Convert pounds-force to newtons: 1 lbf = 4.44822 N. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 lbf = 4.44822 N
newtons = pounds-force × 4.448221615 — reverse: pounds-force = newtons × 0.2248089431
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 = 22.2411 N
- 12.5 lbf = 55.6028 N
- 100 lbf = 444.822 N
Pounds-force to newtons conversion table
| Pounds-force (lbf) | Newtons (N) |
|---|---|
| 1 | 4.44822 |
| 2 | 8.89644 |
| 3 | 13.3447 |
| 4 | 17.7929 |
| 5 | 22.2411 |
| 6 | 26.6893 |
| 7 | 31.1376 |
| 8 | 35.5858 |
| 9 | 40.034 |
| 10 | 44.4822 |
| 15 | 66.7233 |
| 20 | 88.9644 |
| 25 | 111.206 |
| 30 | 133.447 |
| 40 | 177.929 |
| 50 | 222.411 |
| 75 | 333.617 |
| 100 | 444.822 |
| 200 | 889.644 |
| 250 | 1112.06 |
| 500 | 2224.11 |
| 1000 | 4448.22 |
FAQ
How many newtons are in one pound-force?
1 lbf = 4.44822 N. 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 newtons?
Multiply the value in pounds-force by 4.448221615: newtons = pounds-force × 4.448221615. For example, 5 lbf = 22.2411 N.
How do I convert newtons back to pounds-force?
Multiply by the inverse factor 0.2248089431 (pounds-force = newtons × 0.2248089431), or use the newtons-to-pounds-force page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=lbf&to_unit=N - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"lbf","to_unit":"N"} - Markdown: https://tttkmbb.com/conversion/pound-force-to-newtons.md · JSON: https://tttkmbb.com/conversion/pound-force-to-newtons.json (add
?value=for a result) · Units: /api/v1/units?quantity=force - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.