🔧 Torque Conversion
Convert between metric and imperial rotational torque units: Newton-meters (N·m) and pound-feet / foot-pounds (lb-ft). Crucial for automotive repair, lug nut tightening specs, bicycle maintenance, and engine dyno readouts.
Torque conversion calculates equivalent measures across standardized metric, customary, and technical units using fixed mathematical ratios. Standardized in accordance with NIST Special Publication 811 and BIPM SI guidelines, enabling precision calculations between N·m, lb-ft, and 0 additional units.
Metrological Standards & Base Equation
1 N·m ≈ 0.737562 lb-ft. 1 lb-ft ≈ 1.355818 N·m.
All torque conversion factors on this platform comply with NIST Special Publication 811 (Guide for the Use of the International System of Units) and the BIPM SI Brochure (9th Edition), utilizing exact rational ratios and IEEE-754 double-precision arithmetic to prevent rounding distortion.
Primary References: NIST SP 811 (2008 Edition) · BIPM SI Brochure (2019) · Standards Directory
Supported Torque Units (2 Total)
| Unit Symbol | Unit Name | System | Equivalent in Newton-meter |
|---|---|---|---|
N·m |
Newton-meter | Metric | Reference Standard (1 N·m) |
lb·ft |
Pound-foot | Imperial | 1 lb·ft = 1.35582 N·m |
Popular Torque Conversions
Newton-meter to Foot-pound
N·m → lb-ft — metric automotive specs to US wrench torque
Foot-pound to Newton-meter
lb-ft → N·m — torque wrench calibration and import vehicle service
Common Use Cases
- Wheel lug nut torque specifications
- Engine cylinder head and manifold bolt tightening
- Bicycle bottom bracket and pedal servicing
- Industrial machinery shaft calibration
Related Conversion Categories
Frequently Asked Questions
How do I convert Newton-meters to foot-pounds?
Multiply the torque in Newton-meters (N·m) by 0.737562. For example, 100 N·m × 0.737562 = 73.76 lb-ft.
What torque is typical for car wheel lug nuts?
Most passenger cars require lug nuts torqued to between 110 N·m and 140 N·m (approximately 80 to 100 lb-ft).