Convert Foot-pounds-force to Newton-meters
Instantly convert Foot-pounds-force (ft·lbf) to Newton-meters (N·m) with our free online calculator.
Formula: ft·lbf to N·m — multiply by 1.35582
Reference Table
| Foot-pounds-force (ft·lbf) | Newton-meters (N·m) |
|---|---|
| 1 | 1.35582 |
| 5 | 6.7791 |
| 10 | 13.5582 |
| 25 | 33.8955 |
| 50 | 67.791 |
| 100 | 135.582 |
How to Convert Foot-pounds-force to Newton-meters
Formula
To convert Foot-pounds-force (ft·lbf) to Newton-meters (N·m): multiply by 1.35582
Step-by-Step
- Start with your value in Foot-pounds-force (ft·lbf).
- Multiply by 1.35582 to perform the conversion.
- The result is your value expressed in Newton-meters (N·m).
Conversion Factor
1 ft·lbf = 1.35582 N·m
Reverse Factor
1 N·m = 0.737561 ft·lbf
Worked Example
Convert 25 Foot-pounds-force to Newton-meters: 25 ft·lbf = 33.8955 N·m
About Foot-pound-force (ft·lbf)
An imperial unit of torque equal to one pound-force applied at a one-foot lever arm (≈ 1.35582 N·m per NIST SP 811). Foot-pounds are the dominant US working unit for torque in automotive, industrial, and trades work: vehicle service manuals (passenger-car wheel-lug torque 80-100 ft·lbf; light-truck 130-160 ft·lbf; semi-truck 450-500 ft·lbf), automotive engine peak-torque specifications (US passenger cars typically 130-400 ft·lbf; full-size pickup diesel 800-1,000 ft·lbf; Dodge Challenger Hellcat Redeye 707 ft·lbf), US-made torque-wrench scales (Snap-On, Mac, Matco), helicopter and small-aircraft propeller/prop-strike inspection criteria, ASME B16 flange-bolt torque tables, and firearms barrel-threading specifications. Critical engineer's-eye distinction: ft·lbf as TORQUE (a vector moment) is dimensionally identical to ft·lb as ENERGY (a scalar work integral) — both are pound-force × foot — but they describe different physical quantities and must not be conflated when balancing power equations. Convert ft·lbf to N·m by multiplying by 1.356; to in·lbf by multiplying by 12.
About Newton-meter (N·m)
The SI unit of torque, moment of force, and bending moment (ISO 80000-4 §4-10), equal to the twisting effect produced when one newton of force is applied at the end of a one-meter lever arm (1 N·m = 1 kg·m²/s²). N·m is dimensionally identical to the joule, but by convention torque uses N·m and energy uses J — never abbreviate torque as 'joules' even though the units are dimensionally equivalent. Newton-meters are the universal engineering unit for fastener-tightening specifications under VDA / ISO 16047 and DIN 946 (the German tightening-torque standard widely referenced internationally), automobile engine output (a typical compact car produces 150-300 N·m peak torque; a modern diesel truck 1,500-2,500 N·m; Bugatti Chiron 1,600 N·m), electric-motor torque ratings on the NEMA and IEC nameplates (a 1 kW industrial motor at 1,800 rpm produces ~5.3 N·m), bicycle drive-train measurement (e-bike pedal-assist torque sensors typically resolve 0.1 N·m), and finite-element bending-moment results in M_y / M_z form. Modern torque wrenches list N·m as the primary scale; international service manuals specify all fastener torques in N·m alongside the legacy unit.
Quick Facts
- 1 Foot-pound-force equals 1.35582 Newton-meters
- 1 Newton-meter equals 0.737561 Foot-pounds-force
- Foot-pound-force is a unit of torque
- Newton-meter is a unit of torque
- This conversion is commonly used in automotive maintenance, structural engineering, and manufacturing
- The Foot-pound-force belongs to the imperial system
- The Newton-meter belongs to the metric system
Common Foot-pound-force to Newton-meter Conversions
| Foot-pounds-force (ft·lbf) | Newton-meters (N·m) |
|---|---|
| 0.01 | 0.0135582 |
| 0.1 | 0.135582 |
| 0.25 | 0.338955 |
| 0.5 | 0.67791 |
| 1 | 1.35582 |
| 2 | 2.71164 |
| 3 | 4.06746 |
| 5 | 6.7791 |
| 10 | 13.5582 |
| 15 | 20.3373 |
| 20 | 27.1164 |
| 25 | 33.8955 |
| 50 | 67.791 |
| 75 | 101.686 |
| 100 | 135.582 |
| 250 | 338.955 |
| 500 | 677.91 |
| 1000 | 1355.82 |
| 5000 | 6779.1 |
| 10000 | 13558.2 |
Understanding Foot-pounds-force
The Foot-pound-force (symbol: ft·lbf) is a unit of torque. An imperial unit of torque equal to one pound-force applied at a one-foot lever arm (≈ 1.35582 N·m per NIST SP 811). Foot-pounds are the dominant US working unit for torque in automotive, industrial, and trades work: vehicle service manuals (passenger-car wheel-lug torque 80-100 ft·lbf; light-truck 130-160 ft·lbf; semi-truck 450-500 ft·lbf), automotive engine peak-torque specifications (US passenger cars typically 130-400 ft·lbf; full-size pickup diesel 800-1,000 ft·lbf; Dodge Challenger Hellcat Redeye 707 ft·lbf), US-made torque-wrench scales (Snap-On, Mac, Matco), helicopter and small-aircraft propeller/prop-strike inspection criteria, ASME B16 flange-bolt torque tables, and firearms barrel-threading specifications. Critical engineer's-eye distinction: ft·lbf as TORQUE (a vector moment) is dimensionally identical to ft·lb as ENERGY (a scalar work integral) — both are pound-force × foot — but they describe different physical quantities and must not be conflated when balancing power equations. Convert ft·lbf to N·m by multiplying by 1.356; to in·lbf by multiplying by 12.
It belongs to the imperial measurement system.
Foot-pounds-force are commonly used in automotive maintenance, structural engineering, and manufacturing.
Understanding Newton-meters
The Newton-meter (symbol: N·m) is a unit of torque. The SI unit of torque, moment of force, and bending moment (ISO 80000-4 §4-10), equal to the twisting effect produced when one newton of force is applied at the end of a one-meter lever arm (1 N·m = 1 kg·m²/s²). N·m is dimensionally identical to the joule, but by convention torque uses N·m and energy uses J — never abbreviate torque as 'joules' even though the units are dimensionally equivalent. Newton-meters are the universal engineering unit for fastener-tightening specifications under VDA / ISO 16047 and DIN 946 (the German tightening-torque standard widely referenced internationally), automobile engine output (a typical compact car produces 150-300 N·m peak torque; a modern diesel truck 1,500-2,500 N·m; Bugatti Chiron 1,600 N·m), electric-motor torque ratings on the NEMA and IEC nameplates (a 1 kW industrial motor at 1,800 rpm produces ~5.3 N·m), bicycle drive-train measurement (e-bike pedal-assist torque sensors typically resolve 0.1 N·m), and finite-element bending-moment results in M_y / M_z form. Modern torque wrenches list N·m as the primary scale; international service manuals specify all fastener torques in N·m alongside the legacy unit.
It belongs to the metric measurement system.
Newton-meters are commonly used in automotive maintenance, structural engineering, and manufacturing.
Why Convert Foot-pounds-force to Newton-meters?
Converting between Foot-pounds-force and Newton-meters is a frequent requirement for engineers, scientists, and students working with torque values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate torque conversion is essential.
Frequently Asked Questions
How do I convert Foot-pounds-force to Newton-meters?
An imperial unit of torque equal to one pound-force applied at a one-foot lever arm (≈ 1. To convert Foot-pounds-force to Newton-meters, multiply by 1.35582. For example, 25 ft·lbf equals 33.8955 N·m.
How many Newton-meters are in 1 Foot-pound-force?
There are 1.35582 Newton-meters in 1 Foot-pound-force.
How many Foot-pounds-force are in 1 Newton-meter?
There are 0.737561 Foot-pounds-force in 1 Newton-meter.
What is the formula for Foot-pound-force to Newton-meter conversion?
The formula is: multiply by 1.35582. This means 1 ft·lbf = 1.35582 N·m.
Is a Foot-pound-force bigger than a Newton-meter?
No. One Foot-pound-force is smaller than one Newton-meter because 1 ft·lbf equals 1.35582 N·m, which is greater than 1.
When do you need to convert between Foot-pounds-force and Newton-meters?
The SI unit of torque, moment of force, and bending moment (ISO 80000-4 §4-10), equal to the twisting effect produced when one newton of force is applied at the end of a one-meter lever arm (1 N·m = 1 kg·m²/s²). Foot-pound-force and Newton-meter are both torque units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.