Feet-Pound to Joule Converter
Energy · unit-converter
Convert Feet-Pound to Joule 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: Joule (j)
About Feet-Pound
The feet-pound is a mechanical work unit common in US torque and ballistics contexts.
About Joule
The joule is the SI unit of energy. All other units here are converted through fixed joule equivalents.
How to convert feet-pounds to joules
1 feet-pound is equal to 1.3558179483314 joule when both are expressed in joule-equivalents:
1 ftlb = (1.3558179483314003 J ÷ 1 J) j = 1.3558179483314 j
Each feet-pound is defined as 1.3558179483314003 J and each joule as 1 J in this tool, so one ftlb equals 1.3558179483314003 ÷ 1 j = 1.3558179483314 j.
Let d(ftlb) be the numeric amount in Feet-Pound (ftlb), and d(j) the amount in Joule (j). Then:
d(j) = d(ftlb) × (1.3558179483314003 / 1)
Equivalently, divide by how many ftlb fit into one j (joules per j divided by joules per ftlb):
d(j) = d(ftlb) ÷ 0.73756214927727
Or: joule = feet-pound ÷ 0.73756214927727
Examples
Example #1: Convert 1 ftlb to joule
1 ftlb = 1 ftlb × (1.3558179483314003/1) j = 1.3558179483 j
1 ftlb = 1 ftlb ÷ 0.73756214927727 = 1.3558179483 j
Example #2: Convert 10 ftlb to joule
10 ftlb = 10 ftlb × (1.3558179483314003/1) j = 13.5581794833 j
10 ftlb = 10 ftlb ÷ 0.73756214927727 = 13.5581794833 j
Summary
To convert Feet-Pound to Joule, multiply the value in ftlb by the ratio of joules per ftlb divided by joules per j. Equivalently: value_j = value_ftlb × (1.3558179483314003 / 1). Numerically, 1 ftlb equals 1.3558179483314003 j.
Relationship context
You are converting between US / imperial engineering units (BTU, therm, ft·lb) (Feet-Pounds) and SI energy (joules) (Joules). All values are mapped through joules first. The numeric factor is 1.355818e+0.
Conversion tables
| Feet-Pound (ftlb) | Joule (j) |
|---|---|
| 0.1 | 0.1355817948 |
| 1 | 1.3558179483 |
| 2 | 2.7116358967 |
| 3 | 4.067453845 |
| 4 | 5.4232717933 |
| 5 | 6.7790897417 |
| 6 | 8.13490769 |
| 7 | 9.4907256383 |
| 8 | 10.8465435867 |
| 9 | 12.202361535 |
| Feet-Pound (ftlb) | Joule (j) |
|---|---|
| 10 | 13.5581794833 |
| 20 | 27.1163589666 |
| 30 | 40.6745384499 |
| 40 | 54.2327179333 |
| 50 | 67.7908974166 |
| 60 | 81.3490768999 |
| 70 | 94.9072563832 |
| 80 | 108.465435867 |
| 90 | 122.02361535 |
| 100 | 135.581794833 |