13 Foot-Pound to Kilojoule
Quick answer
13 Foot-Pound (ft·lbf) equals
0.017626 kJ
To convert 13 Foot-Pounds to Kilojoules, multiply by 0.0013558179. Therefore, 13 Foot-Pound (ft·lbf) equals 0.017626 Kilojoule (kJ).
Formula: kJ = ft·lbf × 0.0013558179. Calculation: 13 × 0.0013558179 = 0.017626 kJ.
Convert Foot-Pound (ft·lbf) to Kilojoule (kJ) online with our free unit converter. In energy, 1 ft·lbf = 0.001356 kJ. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Foot-Pound to Kilojoule
- Step 1 — start with the formula. kJ = ft·lbf × 0.0013558179
- Step 2 — substitute your figure. 13 ft·lbf × 0.0013558179
- Step 3 — read the result. 13 ft·lbf = 0.017626 kJ
- Step 4 — check it in reverse. ft·lbf = kJ × 737.5621492943 returns 13.0003 ft·lbf, which matches the figure you started with.
Energy Converter
27 units available
13 ft·lbf = 0.017626 kJ
Formula:
kJ = ft·lbf × 0.0013558179With your value: 13 ft·lbf = 0.01762563 kJ
How big is that?
Everyday references on a logarithmic scale, all expressed in foot-pound so you can sanity-check the result.
Other Foot-Pound to Kilojoule conversions
Foot-Pound to Kilojoule Conversion Table
| Foot-Pound (ft·lbf) | Kilojoule (kJ) |
|---|---|
| 0.5 | 0.000678 |
| 1 | 0.001356 |
| 2 | 0.002712 |
| 5 | 0.006779 |
| 10 | 0.013558 |
| 15 | 0.020337 |
| 20 | 0.027116 |
| 25 | 0.033895 |
| 50 | 0.067791 |
| 100 | 0.135582 |
| 250 | 0.338954 |
| 500 | 0.677909 |
| 1000 | 1.355818 |
Kilojoule to Foot-Pound Conversion Table
| Kilojoule (kJ) | Foot-Pound (ft·lbf) |
|---|---|
| 0.5 | 368.781075 |
| 1 | 737.562149 |
| 2 | 1,475.124299 |
| 5 | 3,687.810746 |
| 10 | 7,375.621493 |
| 15 | 11,063.432239 |
| 20 | 14,751.242986 |
| 25 | 18,439.053732 |
| 50 | 36,878.107465 |
| 100 | 73,756.214929 |
| 250 | 184,390.537324 |
| 500 | 368,781.074647 |
| 1000 | 737,562.149294 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Foot-Pound (ft·lbf)
Energy
Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Kilojoule (kJ)
Energy
Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Foot-Pound to Kilojoule
To convert from Foot-Pound (ft·lbf) to Kilojoule (kJ), multiply the value by 0.0013558179.
Formula: kJ = ft·lbf × 0.0013558179
Reverse: ft·lbf = kJ × 737.5621492943
Step-by-Step Example
- Start with your value in Foot-Pound. For example: 5 ft·lbf
- Multiply by the conversion factor: 5 x 0.0013558179
- The result is: 0.006779 kJ
Foot-Pound and Kilojoule Relationship
This conversion bridges the US Customary / Imperial and Metric (SI) measurement systems, commonly required when translating scientific data, international engineering specifications, or trade standards. Since 1 Foot-Pound represents a fraction of a Kilojoule (1 Kilojoule ≈ 737.5621 Foot-Pounds), the Kilojoule is the larger measurement interval. Understanding the relationship between Foot-Pound and Kilojoule is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Foot-Pound
The Foot-Pound (symbol: ft·lbf) is a recognized unit in the US Customary / Imperial measurement framework, utilized within energy applications for precision and standardized data representation.
Common uses of Foot-Pound: energy calculations, engineering and science, education.
About Kilojoule
The Kilojoule (symbol: kJ) is a recognized unit in the Metric (SI) measurement framework, utilized within energy applications for precision and standardized data representation.
Common uses of Kilojoule: energy calculations, engineering and science, education.
Frequently Asked Questions
- What is 13 Foot-Pound in Kilojoule?
- 13 Foot-Pound equals 0.017626 Kilojoule.
- How many Kilojoules are in 1 Foot-Pound?
- There are exactly 0.0013558179 Kilojoules in 1 Foot-Pound. This means the conversion factor from Foot-Pound to Kilojoule is 0.0013558179.
- What is the formula to convert Foot-Pound to Kilojoule?
- The formula to convert Foot-Pound to Kilojoule is: kJ = ft·lbf × 0.0013558179. For example, to convert 10 Foot-Pounds to Kilojoules, you would multiply 10 by 0.0013558179.
- What is a Foot-Pound?
- The Foot-Pound (symbol: ft·lbf) is a recognized unit in the US Customary / Imperial measurement framework, utilized within energy applications for precision and standardized data representation.
- What is a Kilojoule?
- The Kilojoule (symbol: kJ) is a recognized unit in the Metric (SI) measurement framework, utilized within energy applications for precision and standardized data representation.
- What are the common uses of Foot-Pound?
- The Foot-Pound is commonly used in energy calculations, engineering and science, education.
Related Energy Conversions
Cite this page
UnitConvertLab. (2026). 13 Foot-Pound to Kilojoule. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/13-foot_pound-to-kilojoule