Feet-Pound to Kilojoule Converter
Energy · unit-converter
Convert Feet-Pound to Kilojoule with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: Feet-Pound (ftlb)
To: Kilojoule (kj)
About Feet-Pound
The feet-pound is a mechanical work unit common in US torque and ballistics contexts.
About Kilojoule
One kilojoule is 1,000 J. Scientific and engineering contexts often use kJ alongside joules.
How to convert feet-pounds to kilojoules
1 feet-pound is equal to 0.00135581794833 kilojoule when both are expressed in joule-equivalents:
1 ftlb = (1.3558179483314003 J ÷ 1,000 J) kj = 0.00135581794833 kj
Each feet-pound is defined as 1.3558179483314003 J and each kilojoule as 1,000 J in this tool, so one ftlb equals 1.3558179483314003 ÷ 1,000 kj = 0.00135581794833 kj.
Let d(ftlb) be the numeric amount in Feet-Pound (ftlb), and d(kj) the amount in Kilojoule (kj). Then:
d(kj) = d(ftlb) × (1.3558179483314003 / 1,000)
Equivalently, divide by how many ftlb fit into one kj (joules per kj divided by joules per ftlb):
d(kj) = d(ftlb) ÷ 737.56214927726535
Or: kilojoule = feet-pound ÷ 737.56214927726535
Examples
Example #1: Convert 1 ftlb to kilojoule
1 ftlb = 1 ftlb × (1.3558179483314003/1,000) kj = 0.0013558179 kj
1 ftlb = 1 ftlb ÷ 737.56214927726535 = 0.0013558179 kj
Example #2: Convert 10 ftlb to kilojoule
10 ftlb = 10 ftlb × (1.3558179483314003/1,000) kj = 0.0135581795 kj
10 ftlb = 10 ftlb ÷ 737.56214927726535 = 0.0135581795 kj
Summary
To convert Feet-Pound to Kilojoule, multiply the value in ftlb by the ratio of joules per ftlb divided by joules per kj. Equivalently: value_kj = value_ftlb × (1.3558179483314003 / 1000). Numerically, 1 ftlb equals 0.0013558179483314004 kj.
Relationship context
You are converting between US / imperial engineering units (BTU, therm, ft·lb) (Feet-Pounds) and SI energy (joules) (Kilojoules). All values are mapped through joules first. The numeric factor is 1.355818e-3.
Conversion tables
| Feet-Pound (ftlb) | Kilojoule (kj) |
|---|---|
| 0.1 | 0.0001355818 |
| 1 | 0.0013558179 |
| 2 | 0.0027116359 |
| 3 | 0.0040674538 |
| 4 | 0.0054232718 |
| 5 | 0.0067790897 |
| 6 | 0.0081349077 |
| 7 | 0.0094907256 |
| 8 | 0.0108465436 |
| 9 | 0.0122023615 |
| Feet-Pound (ftlb) | Kilojoule (kj) |
|---|---|
| 10 | 0.0135581795 |
| 20 | 0.027116359 |
| 30 | 0.0406745384 |
| 40 | 0.0542327179 |
| 50 | 0.0677908974 |
| 60 | 0.0813490769 |
| 70 | 0.0949072564 |
| 80 | 0.1084654359 |
| 90 | 0.1220236154 |
| 100 | 0.1355817948 |