Enter the material thickness and the desired penetration depth into the calculator to determine the screw length required for your project.
Screw Length Formula
The following formula is used to calculate the screw length.
SL = MT + PD
Variables:
- SL is the screw length (mm)
- MT is the material thickness (mm)
- PD is the penetration depth (mm)
To calculate the screw length, add the material thickness to the penetration depth.
What is Screw Length?
Screw length is the total length of a screw that is required to fasten two materials together. It includes the thickness of the material being fastened and the depth the screw must penetrate into the second material to achieve a secure fit. The correct screw length is crucial for the integrity of the connection and to ensure that the screw does not protrude unnecessarily or fail to provide sufficient grip.
How to Calculate Screw Length?
The following steps outline how to calculate the Screw Length.
- First, determine the material thickness (MT) in millimeters.
- Next, determine the desired penetration depth (PD) in millimeters.
- Next, gather the formula from above = SL = MT + PD.
- Finally, calculate the Screw Length (SL) in millimeters.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
material thickness (MT) = 5 mm
penetration depth (PD) = 30 mm