Torque / lbf·in → lbf·ft
Convert Pound-force inches to Pound-force feet
Convert twisting moments for shafts, fasteners, and drives. Convert Pound-force inches (lbf·in) to Pound-force feet (lbf·ft). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Pound-force feet to Pound-force inches →
How to convert pound-force inches to pound-force feet
Moment equals force times perpendicular distance. Although its dimensions match energy, a moment in N·m is not a quantity of heat or work in joules. Pound values here mean pound-force.
Use x for the value in lbf·in, b for the intermediate value in N·m, and y for the result in lbf·ft.
lbf·ft = lbf·in × 0.11298482902761668 ÷ 1.3558179483314003
Worked examples
10 lbf·in ≈ 0.833333333333 lbf·ft
Step 1: (10 × 0.112984829028) ≈ 1.12984829028 N·m.
Step 2: 1.12984829028 ÷ 1.35581794833 ≈ 0.833333333333 lbf·ft.20 lbf·in ≈ 1.66666666667 lbf·ft
Step 1: (20 × 0.112984829028) ≈ 2.25969658055 N·m.
Step 2: 2.25969658055 ÷ 1.35581794833 ≈ 1.66666666667 lbf·ft.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Pound-force inches
Pound-force inches (lbf·in) measures torque under the conventions above. The base value in N·m is (x × 0.112984829028), where x is the numerical value in lbf·in. Factors shown here are rounded for display; calculations use the stored factor.
About Pound-force feet
Pound-force feet (lbf·ft) measures torque under the conventions above. The base value in N·m is (x × 1.35581794833), where x is the numerical value in lbf·ft. Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Pound-force inches to pound-force feet reference table
| Pound-force inches (lbf·in) | Pound-force feet (lbf·ft) |
|---|---|
| 1 | 0.0833333333333 |
| 5 | 0.416666666667 |
| 10 | 0.833333333333 |
| 25 | 2.08333333333 |
| 50 | 4.16666666667 |
| 100 | 8.33333333333 |
| 1000 | 83.3333333333 |
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