Compound Angle Calculator

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Struggling with the intricacies of workpiece angle calculations? If you’re seeking precision in your angle computations to ensure seamless and accurate workpiece cutting and structuring, employ a dedicated angle calculator. 

In this concise guide, I’ll provide you with insights into various types of calculators that can assist you in achieving precisely that.

What is a compound angle calculator used for?

Compound angles are the sum of two or more angles. This specific calculator is used to compute compound angle settings. It is useful in calculating workpieces’ angles when building boxes or any project that requires measurements to form a certain structure. 

Important Terms Explained


A compound cut incorporates two angles – the miter angle and the bevel angle.


It is also referred to as blade tilt. Bevel is the tilt of the saw blade from the saw table.


The horizontal angle on a table saw is called the miter angle. It’s the same as the cross-cut angle.

miter cut

Dihedral Angle

The angle between two surface planes is called the dihedral angle.

Miter Joint

The miter joint joins the cut ends of two boards. 

Butt Joint

The butt joint is a simple woodworking joint that connects the cut side of one board, known as the cap, with the cut side of the second board, also referred to as the butt.

Negative Angle

A negative angle is when the blade moves in the opposite direction from the positive angle. This occurs in butted joints. 

Now that you’ve gained a solid understanding of the fundamentals, you’ll find it a breeze to manipulate and shape your workpieces as you desire. 

You can enhance the precision of your calculations and craft the most optimal structural figures imaginable with the assistance of these specialized calculators below: 

Post and Board Calculator

A board with a long slope in the direction of the vertical post is rotated at a certain angle. Using the post and board calculator for the accurate computation of angles is helpful. 

Whether you’re a professional or a DIY enthusiast, this device streamlines angle measurements, making your projects efficient and precise. Trust the Post and Board Calculator for spot-on results in no time.

N-Sided Box Calculator

Creating an N-sided box entails utilizing identical side pieces and a shared bottom. For those seeking to craft square boxes with precision, the N-side box calculator proves indispensable in ensuring the attainment of perfect right angles. 

This invaluable tool simplifies the construction process, allowing for the seamless creation of square containers with utmost accuracy.

N-Sided Pyramid Calculator

With this calculator, you can have accurate calculations for bevel, butted, and mitered joints, miter angles and complements, base and side slopes, and dihedral angles. 

Rectangular Pyramid Calculator

You can calculate the bevel, mitered and butted joints, miter complement and angle, side slope, and the dihedral angle.

Rectangular Frustum Calculator

For a prism-like figure, you can calculate the bevel, mitered and butted joints, miter angle and complement, side slope, and dihedral angle.

Platonic Solids Calculator

In building platonic solids, you can use this calculator to get the bevel, mitered joint, miter angle, miter complement, and dihedral angle.

General Compound Angles Calculator

In the general compound case, it should have two intersecting surface planes. Use this calculator to get the bevel, mitered and butted joints, miter angle, miter complement, and dihedral angle.

General Compound Angles (2) Calculator

You can calculate the bevel, mitered joint, butted joint, miter angle and complement, and dihedral angle. 

Flips Board on Edge Calculator

You will need to refer to other angle calculators to use this edge calculator. In simple cases, you may only need the miter and bevel angles

Kerf Calculator

You can calculate the effective top kerf and effective longitudinal kerf, which requires the bevel and miter angle. 


How do you calculate compound angles for crown molding?

To calculate the compound angles [1for crown molding, most experts noted that you need to know the wall and spring angles. Then use the angle calculator to get the miter and the bevel cut. 

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Robert Johnson is a passionate furniture maker & carpenter, sought after for his knowledge on the craft.
You’ve probably seen his down-to-earth wisdom in USA Today, Bobvila, Family Handyman, and The Spruce, where he has shared commentary and guidance on various woodworking topics.

Robert is the brain behind Sawinery, where he aims to share tips, tricks, and a passion for all things carpentry.

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