Quickly determine the exact countersink depth needed for flush screw installation. Our free online Countersink Depth Calculator assists machinists, woodworkers, and DIY enthusiasts in achieving professional results. Simply input your screw head's major diameter and the desired countersink angle to get precise measurements and avoid common errors.
Formula:
Formula:
The countersink depth (h) is calculated using the following formula:
h = (D / 2) / tan(A / 2)
Where:
h= Countersink Depth (the calculated result)D= Major Diameter of the screw head (or desired top diameter of the countersink)A= Countersink Angle in degrees (e.g., 82°, 90°, 100°)