Newton-Meter to Foot-Pounds Calculator
Convert torque between newton-meters (N·m) and foot-pounds (ft·lb) instantly. Perfect for automotive, mechanical engineering, and industrial applications. Enter a value in either unit to get the equivalent torque.
What Is Torque?
Torque is a measure of the rotational force applied to an object. It is calculated as the product of force and the perpendicular distance from the axis of rotation to the point where the force is applied. Torque is essential in automotive, mechanical, and industrial applications — from tightening bolts to measuring engine output.
The two most common units of torque are:
- Newton-Meter (N·m): The SI unit of torque. One newton-meter is the torque resulting from a force of one newton applied perpendicularly to a lever arm one meter long.
- Foot-Pound (ft·lb): A unit of torque in the imperial and US customary systems. One foot-pound is the torque resulting from a force of one pound applied perpendicularly to a lever arm one foot long.
How Does the Newton-Meter to Foot-Pounds Calculator Work?
The calculator uses the exact conversion factors:
1 N·m = 0.7375621493 ft·lb
1 ft·lb = 1.3558179483 N·m
These conversion factors are defined by the relationship between the newton, the pound, the meter, and the foot. One newton-meter is approximately 0.737562 foot-pounds.
Simply enter a value in either newton-meters or foot-pounds, select the direction of conversion, and the calculator will instantly compute the equivalent torque.
Why Use This Newton-Meter to Foot-Pounds Calculator?
- Two-Way Conversion: Convert from N·m to ft·lb and from ft·lb to N·m.
- Precise Results: Uses the exact conversion factor (0.7375621493).
- Scientific Notation: Display large or small numbers in scientific format.
- Reference Table: Quick reference for common torque values.
- Free & Private: No registration, no data storage.
Common Torque Equivalents
- 1 N·m ≈ 0.738 ft·lb
- 1 ft·lb ≈ 1.356 N·m
- 10 N·m ≈ 7.376 ft·lb
- 50 N·m ≈ 36.878 ft·lb
- 100 N·m ≈ 73.756 ft·lb
- 200 N·m ≈ 147.512 ft·lb
❓ Newton-Meter to Foot-Pounds Calculator FAQ
What is a newton-meter (N·m)?
A newton-meter is the SI unit of torque. It is the torque resulting from a force of one newton applied perpendicularly to a lever arm one meter long. It is also equivalent to one joule of energy.
What is a foot-pound (ft·lb)?
A foot-pound is a unit of torque in the imperial system. It is the torque resulting from a force of one pound applied perpendicularly to a lever arm one foot long. It is commonly used in automotive and mechanical applications.
How many foot-pounds are in a newton-meter?
1 newton-meter (N·m) = 0.7375621493 foot-pounds (ft·lb).
How many newton-meters are in a foot-pound?
1 foot-pound (ft·lb) = 1.3558179483 newton-meters (N·m).
What is the formula for converting newton-meters to foot-pounds?
ft·lb = N·m × 0.7375621493. For example, 100 N·m × 0.737562 = 73.7562 ft·lb.
What is the formula for converting foot-pounds to newton-meters?
N·m = ft·lb × 1.3558179483. For example, 50 ft·lb × 1.355818 = 67.7909 N·m.
What is the difference between torque and work?
Torque and work have the same units (N·m or ft·lb), but they are different concepts. Torque is a rotational force, while work is the energy transferred when a force moves an object. 1 N·m of torque is not the same as 1 J of work; torque requires rotation to do work.
Is foot-pound the same as pound-foot?
Yes. "Foot-pound" and "pound-foot" are often used interchangeably for torque. However, in physics, "pound-foot" is sometimes preferred to avoid confusion with the unit of work (foot-pound). Both refer to the same torque measurement.
What is the torque spec for wheel lug nuts?
Wheel lug nut torque varies by vehicle, but typical values range from 80-100 ft·lb (108-136 N·m) for passenger cars and 100-150 ft·lb (136-203 N·m) for trucks and SUVs. Always check your vehicle's manual for the correct specification.
How do I convert N·m to ft·lb for torque wrenches?
If your torque wrench is in ft·lb and the specification is in N·m, multiply the N·m value by 0.737562. For example, 120 N·m × 0.737562 = 88.5 ft·lb. This calculator does the conversion for you.
What is the difference between torque and horsepower?
Torque is a measure of rotational force, while horsepower is a measure of power (work done over time). The relationship is: Horsepower = (Torque × RPM) / 5252. Both are important for understanding engine performance.
Can I use this calculator for automotive torque specifications?
Yes. This calculator is perfect for converting torque specifications between metric and imperial units, which is common in automotive repair and maintenance.
What is the torque of a typical car engine?
Typical car engines produce between 150-400 N·m (110-295 ft·lb) of torque. Performance engines can produce 500+ N·m (370+ ft·lb), while truck engines can exceed 1000 N·m (738 ft·lb).
What is the symbol for foot-pounds?
The symbol for foot-pounds is ft·lb or ft-lb. It is sometimes written as lb·ft (pound-foot) in technical contexts.
What is the symbol for newton-meters?
The symbol for newton-meters is N·m or Nm.
How do I convert N·m to ft·lb in my head?
Multiply the N·m value by 0.74 (approximate). For example, 100 N·m × 0.74 ≈ 74 ft·lb. For more precise results, use this calculator.