Home › Unit Conversion › Joules to Foot-pounds
Joules to Foot-pounds (J to ft·lbf)
Convert joules to foot-pounds: 1 J = 0.737562 ft·lbf. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 J = 0.737562 ft·lbf
foot-pounds = joules × 0.7375621493 — reverse: joules = foot-pounds × 1.355817948
The factor is derived from the SI definitions of both units (base unit: J) 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 J = 3.68781 ft·lbf
- 12.5 J = 9.21953 ft·lbf
- 100 J = 73.7562 ft·lbf
Joules to foot-pounds conversion table
| Joules (J) | Foot-pounds (ft·lbf) |
|---|---|
| 1 | 0.737562 |
| 2 | 1.47512 |
| 3 | 2.21269 |
| 4 | 2.95025 |
| 5 | 3.68781 |
| 6 | 4.42537 |
| 7 | 5.16294 |
| 8 | 5.9005 |
| 9 | 6.63806 |
| 10 | 7.37562 |
| 15 | 11.0634 |
| 20 | 14.7512 |
| 25 | 18.4391 |
| 30 | 22.1269 |
| 40 | 29.5025 |
| 50 | 36.8781 |
| 75 | 55.3172 |
| 100 | 73.7562 |
| 200 | 147.512 |
| 250 | 184.391 |
| 500 | 368.781 |
| 1000 | 737.562 |
FAQ
How many foot-pounds are in one joule?
1 J = 0.737562 ft·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 joules to foot-pounds?
Multiply the value in joules by 0.7375621493: foot-pounds = joules × 0.7375621493. For example, 5 J = 3.68781 ft·lbf.
How do I convert foot-pounds back to joules?
Multiply by the inverse factor 1.355817948 (joules = foot-pounds × 1.355817948), or use the foot-pounds-to-joules page.
Related conversions
- Foot-pounds to joules (reverse)
- Energy Converter — all energy units in one tool
- Kilocalories (food calories) to Kilojoules
- Kilojoules to Kilocalories (food calories)
- Joules to Calories (small, thermochemical)
- Calories (small, thermochemical) to Joules
- Kilowatt-hours to Megajoules
- Megajoules to Kilowatt-hours
- Kilowatt-hours to BTU
- BTU to Kilowatt-hours
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=J&to_unit=ft_lbf - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"J","to_unit":"ft_lbf"} - Markdown: https://tttkmbb.com/conversion/joules-to-foot-pounds.md · JSON: https://tttkmbb.com/conversion/joules-to-foot-pounds.json (add
?value=for a result) · Units: /api/v1/units?quantity=energy - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.