Pound-Feet to Newton-Meters

Updated: July 25, 2026 · Source: NIST Guide to the SI, Appendix B (Authoritative SI and U.S. customary conversion-factor reference.)

Methodology·How We Verify

Snapshot

1 pound-foot equals approximately 1.3558179483 newton-meters. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

Reference basis: Multiply pound-feet by approximately 1.3558179483.
Example: For 100 pound-feet, the result is about 135.58179483 newton-meters.
Source basis: NIST Guide to the SI, Appendix B.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Converter Calculator

1.355818 Newton-meters (N·m)

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Explanation

Formula: Newton-meters = Pound-feet × 1.355818. Why: this is a cross-system torque conversion. The calculator normalizes the value through newton-meters, then applies the exact target-unit constant for consistent mechanical and engineering use.

Pound-feet (lbf·ft): an imperial torque unit common in automotive, machinery, and fastener specifications.

Newton-meters (N·m): the SI derived unit of torque, expressing rotational force as force applied through a lever arm distance.

This route is useful when translating torque values across SI, imperial, and kilogram-force conventions so fastener specs, drivetrain ratings, and mechanical calculations stay comparable.

This conversion is purely multiplicative because both units reduce through newton-meters using fixed torque definitions with no offset.

Conversion Basis

Multiply pound-feet by approximately 1.3558179483.
For 100 pound-feet, the result is about 135.58179483 newton-meters.
The snapshot, calculator, common values, and reverse route use the same conversion basis.
Source: NIST Guide to the SI, Appendix B (Authoritative SI and U.S. customary conversion-factor reference.)

Reference & Scope

The factor follows from the international foot and pound-force relationships.

Values are calculated from one explicit conversion basis.
Displayed results are rounded only after the underlying calculation.
Real measured materials and ingredients can vary from the stated reference basis.
Source: NIST Guide to the SI, Appendix B (Authoritative SI and U.S. customary conversion-factor reference.)

Common Conversion Values

Pound-feet (lbf·ft)	Newton-meters (N·m)
1	1.355818
10	13.558179
25	33.895449
50	67.790897
75	101.686346
100	135.581795
150	203.372692
200	271.16359

Frequently Asked Questions

What is 1 pound-foot in newton-meters?

1 Pound-foot equals 1.355818 Newton-meters on this page.

What reference basis does this Pound-feet to Newton-meters page use?

This route normalizes both torque units through newton-meters, then applies the fixed target-unit constant so the direct answer, calculator, and table stay aligned.

When would I convert pound-feet to newton-meters?

This route is useful when translating torque values across SI, imperial, and kilogram-force conventions so fastener specs, drivetrain ratings, and mechanical calculations stay comparable.

How do I reverse Pound-feet to Newton-meters?

Use the mirror Newton-meters to Pound-feet route; it applies the inverse relationship with the same torque assumptions.