Mortise and Tenon Calculator
Calculate precise mortise and tenon dimensions for strong traditional joints
About this calculator
This mortise and tenon calculator helps woodworkers determine the precise dimensions needed for creating strong, traditional joints. It calculates optimal mortise width, depth, and tenon thickness based on your wood dimensions and project requirements. The tool ensures proper proportions for maximum joint strength while accounting for wood movement and standard woodworking practices. Perfect for furniture makers, cabinetmakers, and hobbyists seeking professional-quality joinery results.
How to use
Enter your wood piece dimensions including thickness, width, and length. Select your wood type and joint strength requirements. The calculator will automatically determine the optimal mortise depth, width, and corresponding tenon dimensions. Use the results as cutting guides for your chisel work and tenon shaping.
Frequently asked questions
What's the ideal mortise to tenon ratio?
Generally, mortise width should be one-third of the wood thickness, with tenon thickness slightly smaller to allow for glue and easy assembly.
How deep should a mortise be?
Mortise depth typically ranges from two-thirds to three-quarters of the receiving piece's thickness, depending on joint strength requirements.
Should tenons be centered on the wood piece?
Not always. Tenon placement depends on the joint's function and stress loads. Off-center tenons are common in many applications.