Screw Torque To Linear Force Calculator

The Screw Torque to Linear Force Calculator is an essential tool for engineers and mechanics working with threaded fasteners and mechanical assemblies. This calculator helps in determining the linear force exerted by a screw based on the applied torque and the lever arm’s length. Understanding this relationship is crucial for designing and analyzing mechanical systems where precise force application is necessary.


Understanding the conversion from screw torque to linear force is vital in various engineering and mechanical applications. When designing mechanical systems, ensuring that the applied force meets the required specifications is crucial for functionality and safety. This conversion helps in:

  1. Mechanical Design: Ensuring that components can withstand the applied forces without failure.
  2. Safety: Preventing over-torquing, which can lead to damage or failure of components.
  3. Efficiency: Optimizing the design for better performance and longevity of the mechanical system.
  4. Maintenance: Facilitating proper maintenance procedures by knowing the exact forces involved.

How to Use

Using the Screw Torque to Linear Force Calculator is straightforward:

  1. Enter Screw Torque (Nm): Input the torque applied to the screw in Newton meters.
  2. Enter Length of Lever Arm (m): Input the length of the lever arm in meters.
  3. Enter Angle (degrees): Input the angle between the lever arm and the direction of the force in degrees.
  4. Click Calculate: Press the “Calculate” button to determine the linear force.

The calculator uses the formula LF=STL×sin⁡(a)\text{LF} = \frac{\text{ST}}{\text{L} \times \sin(\text{a})}LF=L×sin(a)ST​, where LF is the linear force, ST is the screw torque, L is the lever arm length, and a is the angle.

FAQs and Answers

  1. What is screw torque?
    • Screw torque is the rotational force applied to a screw to tighten it. It is measured in Newton meters (Nm).
  2. Why is linear force important?
    • Linear force is crucial for understanding how much force is exerted along a straight line, which is essential for mechanical stability and performance.
  3. How does the lever arm length affect the linear force?
    • The lever arm length directly affects the linear force. A longer lever arm results in a higher linear force for the same amount of torque.
  4. Why do we need to consider the angle in this calculation?
    • The angle affects the component of the force that acts in the desired direction. Only the force component along the lever arm’s direction contributes to the linear force.
  5. Can this calculator be used for different types of screws?
    • Yes, this calculator can be used for any type of screw as long as the required parameters (torque, lever arm length, and angle) are known.
  6. Is the calculation affected by the material of the screw?
    • The calculation itself is not affected by the material of the screw, but the material can influence the maximum torque the screw can handle.
  7. How accurate is the Screw Torque to Linear Force Calculator?
    • The accuracy depends on the precision of the input values. Ensure accurate measurements for the best results.
  8. What units are used in this calculator?
    • The calculator uses Newton meters (Nm) for torque, meters (m) for lever arm length, and degrees for the angle.
  9. Can this calculator help in preventing over-torquing?
    • Yes, by knowing the linear force, you can ensure that the applied torque does not exceed the limits that could damage the screw or the assembly.
  10. Is this calculator useful for non-engineers?
    • While primarily designed for engineers, anyone involved in mechanical maintenance or assembly can benefit from understanding the relationship between torque and linear force.


The Screw Torque to Linear Force Calculator is a powerful tool for anyone involved in mechanical design, assembly, or maintenance. By simplifying the calculation of linear force from applied torque, this tool helps ensure the accuracy and safety of mechanical systems. Whether you’re an engineer working on complex designs or a mechanic performing routine maintenance, understanding this fundamental relationship is key to achieving optimal performance and longevity in your mechanical systems. Use the calculator to enhance your work efficiency and ensure precision in your mechanical applications.