The pocket hole calculator tells you the correct screw length and drill guide depth setting for any stock thickness. Using the wrong screw length is the most common pocket hole mistake — screws too short won't hold, and screws too long will blow through the face of your workpiece.
Pocket Hole Settings Calculator
Common: 1/2" (0.5), 3/4" (0.75), 1" (1.0), 1-1/2" (1.5)
Quick Reference: Pocket Hole Settings
| Thickness | Screw Length | Drill Setting | Use For |
|---|---|---|---|
| 1/2" (12mm) | 1" fine-thread | 1/2" | Thin plywood, panels |
| 3/4" (19mm) | 1-1/4" coarse | 3/4" | Cabinet boxes, face frames |
| 1" (25mm) | 1-1/2" coarse | 1" | Thick panels, rough lumber |
| 1-1/2" (38mm) | 2-1/2" coarse | 1-1/2" | 2× lumber framing |
How to Use a Pocket Hole Jig
Pocket hole joinery creates fast, strong connections between boards by drilling an angled pocket and driving a self-tapping screw. This pocket hole calculator eliminates the guesswork of which screw length and drill setting to use for your stock thickness.
Setting Up Your Jig
Set the drill guide collar to the thickness of your stock (e.g., 3/4" setting for 3/4" plywood). The collar controls how deep the step drill bit bores into the wood. Clamp the jig against the end or edge of your workpiece with the guide holes centered on the stock thickness. Drill both pocket holes in one pass — the jig positions the bit at the correct 15-degree angle automatically.
Screw Selection Tips
Always use pan-head screws designed for pocket hole systems — standard wood screws won't seat properly in the pocket. For softwood, plywood, and MDF, use coarse-thread screws. For hardwood (oak, maple, cherry), use fine-thread screws which won't strip the harder wood fibers. When in doubt, test one joint before committing to a full assembly.
Joint Strength
Add wood glue to pocket hole joints when strength is important. The mechanical connection handles alignment during clamping; the glue provides long-term strength. Clamp the joint while the glue sets. For visible edges, use pocket holes on the back or bottom face where they won't show.
FAQ
Is this pocket hole calculator free?
Yes, completely free. All calculations run in your browser with no signup required.
What screw length do I need for 3/4 inch material?
For 3/4 inch (19mm) material, use 1-1/4 inch coarse-thread pocket hole screws for soft/medium hardness woods. For face grain to face grain joints in hardwood, use fine-thread screws of the same length. Set your drill guide to the 3/4 inch depth setting.
What is the difference between coarse and fine thread pocket hole screws?
Coarse-thread screws are for softwood, plywood, and MDF. They have aggressive threads that grip soft material well. Fine-thread screws are for hardwood — they have tighter threads that won't strip the harder material. Always match screw type to wood species.
Can I use pocket holes for face frames and cabinet boxes?
Yes. Pocket hole joints are excellent for cabinet face frames, drawer boxes, and cabinet carcass construction. They're fast, strong, and allow for adjustment during assembly before glue sets. Standard face frame stock is 3/4 inch, requiring 1-1/4 inch screws.
How strong is a pocket hole joint?
Pocket hole joints are strong in shear and withdrawal. A 3/4 inch joint with glue can handle 100+ lbs of force. They are weakest in tension perpendicular to the screw. For structural applications, use glue with pocket hole joints. They're rated for furniture, cabinetry, and face frames.