Convert Ergs to Foot-pounds
1 erg equals 7.375621493 × 10⁻⁸ foot-pounds (ft·lbf).
1 erg = 7.375621493e-8 ft·lbf
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk erg to foot-pound converter to paste a column from Excel.
How to Convert Erg to Foot-pound
- 1 erg = 7.375621493 × 10⁻⁸ ft·lbf
- 1 ft·lbf = 13558179.48 erg
- Example: convert 15 erg to ft·lbf: 15 erg = 15 × 7.375621493 × 10⁻⁸ ft·lbf = 0.000001106343224 ft·lbf
Formula
ft·lbf = erg × 7.375621492773 × 10⁻⁸
or ft·lbf = erg ÷ 13558179.48331
Derivation from SI units:
- 1 erg = 1 dyn·cm = 10⁻⁷ J
- 1 ft·lbf = 0.3048 m × 4.4482216152605 N = 1.3558179483314 J
- 1 erg = 1 × 10⁻⁷ J ÷ 1.355817948331 J per ft·lbf = 7.375621492773 × 10⁻⁸ ft·lbf
Both units are defined exactly, so the factor is exact. Erg definition: erg; Foot-pound definition: foot-pound.
Worked examples
- A reading of 1000 erg converts to 0.00007375621493 ft·lbf.
1000 erg × 7.375621493 × 10⁻⁸ = 0.00007375621493 ft·lbf - A value of 1e6 erg is 0.07375621493 ft·lbf.
1e6 erg × 7.375621493 × 10⁻⁸ = 0.07375621493 ft·lbf
Erg to Foot-pound conversion table
| Ergs (erg) | Foot-pounds (ft·lbf) |
|---|---|
| 1 erg | 7.375621493 × 10⁻⁸ ft·lbf |
| 10 erg | 7.375621493 × 10⁻⁷ ft·lbf |
| 100 erg | 0.000007375621493 ft·lbf |
| 1000 erg | 0.00007375621493 ft·lbf |
| 10000 erg | 0.0007375621493 ft·lbf |
| 1e5 erg | 0.007375621493 ft·lbf |
| 1e6 erg | 0.07375621493 ft·lbf |
| 1e7 erg | 0.7375621493 ft·lbf |
| 1e10 erg | 737.5621493 ft·lbf |
| 3.828e33 erg | 2.823387907 × 10²⁶ ft·lbf |
Where it's used
Ergs are used for astrophysics (luminosities in erg/s), while foot-pounds appear in muzzle energy of firearms and air rifles. Both measure energy, work and heat, so the conversion is a fixed factor.
Erg to other energy units
| Conversion | 1 erg equals |
|---|---|
| erg to joule | 1 × 10⁻⁷ J |
| erg to kilojoule | 1 × 10⁻¹⁰ kJ |
| erg to megajoule | 1 × 10⁻¹³ MJ |
| erg to calorie | 2.390057361 × 10⁻⁸ cal |
| erg to kilocalorie | 2.390057361 × 10⁻¹¹ kcal |
| erg to watt-hour | 2.777777778 × 10⁻¹¹ Wh |
| erg to kilowatt-hour | 2.777777778 × 10⁻¹⁴ kWh |
| erg to BTU | 9.478171203 × 10⁻¹¹ BTU |
| erg to therm | 9.48043428 × 10⁻¹⁶ thm |
| erg to electronvolt | 624150907400 eV |
| erg to foot-pound | 7.375621493 × 10⁻⁸ ft·lbf |
Frequently asked questions
How many foot-pounds are in 1 erg?
1 erg = 7.375621493 × 10⁻⁸ ft·lbf.
How do I convert ergs to foot-pounds?
Multiply the value in erg by 7.375621493 × 10⁻⁸, or divide it by 13558179.48. For example, 15 erg × 7.375621493 × 10⁻⁸ = 0.000001106343224 ft·lbf.
Is the erg to ft·lbf conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "erg (erg)".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "foot pound-force (ft·lbf)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Ergs to Foot-pounds. Retrieved October 17, 2026, from https://scientificconverters.com/energy/ergs-to-foot-pounds/
IEEE
Scientific Converters, "Convert Ergs to Foot-pounds," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/energy/ergs-to-foot-pounds/