What is the best angle to cut a miter joint?

A miter joint is commonly used in woodworking and carpentry to create a clean and aesthetic corner, particularly for frames, moldings, and trims. The ideal angle for a standard miter joint is 45 degrees. This is because a 45-degree cut on each of the two pieces being joined forms a 90-degree angle at the corner when the pieces are fitted together. Achieving this angle helps ensure that the two pieces align perfectly, allowing for a tight, seamless joint that enhances the appearance of the project.

When the cut is made at 45 degrees, it effectively bisects the right angle of 90 degrees, which is why it is the go-to angle for creating miter joints in most applications. This angle also aids in providing structural integrity while ensuring the finished edges look polished and professional.