Torque Converter
Convert between newton-metres, kilogram-force metres, pound-force feet and pound-force inches.
Formula and sources updated · Data sources · 1View algorithm, constants and default inputs (JSON)
1 lbf·ft ≈ 1.3558179483 N·m
About this calculator
Torque is a rotational force, so its units combine a force with a distance. The distinction between pound-force feet and pound-force inches matters enormously on fasteners, where the two differ by a factor of twelve.
Worked example
calculated with the default values below
Value 1 · From Newton-metres (N·m) · To Pound-force feet (lbf·ft) · Decimal places 4 Result 0.7376 · Newton-metres 1.0000 N·m · Pound-force feet 0.7376 lbf·ft · Pound-force inches 8.851 lbf·in
Method and assumptions
Formula basis and scope
Convert torque via newton-metres, not energy despite the shared dimensions.
Only the displayed unit definitions are converted; rounding and measurement uncertainty are separate.
Data sources
Disclaimer
These calculators give general conversion results. Rounding and the precision of the value you enter both affect the output, so treat displayed decimals as indicative rather than exact.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
R = V × F[from] ÷ F[to]
- V
- Value
- from
- Source unit
- to
- Target unit
- F
- Factor to N·m
F (→ N·m): nm 1, kgfm 9.80665, lbfft 1.3558179483314, lbfin 0.1129848290276167, ozfin 0.00706155181422579.
Frequently asked questions
Why are pound-force feet and inches twelve times apart?
The converter treats lbf·ft and lbf·in as the same force at different arm lengths, so they differ by exactly twelve because a foot holds twelve inches. The tool uses 1 lbf·ft = 1.3558 N·m and 1 lbf·in = 0.1130 N·m, a twelvefold gap. On fasteners a misread between the two is dangerous — torqueing to 100 in the wrong unit is either 8.3 lbf·ft or 1,200 lbf·in, not the same tightness.