Woodworking Math Tables, Formulas and Calculators
posted on August 15, 2013 by Rockler

Contents

This Page

Page 2

  • Right Triangle Angle and Dimension Formulas
  • Right Triangle Calculator Trigonometric Function Table

Page 3

  • Math Formulas for Polygon Shapes
  • Polygon Calculator
  • Tables of Angles and Dimensions for Common Polygon Shapes

Introduction

In this article we've put together woodworking math resources to help you solve some of the most common math problems in woodworking. The formulas, calculators and tables offered here are intended to make your calculations easier, and to offer a comparison for your own figures. Be sure to double-check all of your woodworking calculations and make an appropriate number of test cuts before you sawing the materials you've invested in for your project.

For a closer look at the math involved in calculating angles try our article, Understanding Angles.

Fractional / Decimal Equivalents

In the following pages, you'll notice that angle math problems are usually worked out in decimal notation. The fractional / decimal conversion chart below will help you transfer your calculations to your tape measure.

FRACTIONAL / DECIMAL EQUIVALENTS
1/64 0.015625 17/64 0.265625 33/64 0.515625 49/64 0.765625
1/32 0.03125 9/32 0.28125 17/32 0.53125 25/32 0.78125
3/64 0.046875 19/64 0.296875 35/64 0.546875 51/64 0.796875
1/16 0.0625 5/16 0.3125 9/16 0.5625 13/16 0.8125
5/64 0.078125 21/64 0.328125 37/64 0.578125 53/64 0.828125
3/32 0.09375 11/32 0.34375 19/32 0.59375 27/32 0.84375
7/64 0.109375 23/64 0.359375 39/64 0.609375 55/64 0.859375
1/8 0.125 3/8 0.375 5/8 0.625 7/8 0.875
9/64 0.140625 25/64 0.390625 41/64 0.640625 57/64 0.890625
5/32 0.15625 13/32 0.40625 21/32 0.65625 29/32 0.90625
11/64 0.171875 27/64 0.421875 43/64 0.671875 59/64 0.921875
3/16 0.1875 7/16 0.4375 11/16 0.6875 15/16 0.9375
13/64 0.203125 29/64 0.453125 45/64 0.703125 61/64 0.953125
7/32 0.21875 15/32 0.46875 23/32 0.71875 31/32 0.96875
15/64 0.234375 31/64 0.484375 47/64 0.734375 63/64 0.984375
1/4 0.250 1/2 0.500 3/4 0.750 1 1.000
posted on August 15, 2013 by Rockler
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Comments

One thought on “Woodworking Math Tables, Formulas and Calculators”

  • daniel Sauve

    I am trying to figure out the geometry to build a light house, so far I know how to figure out the demensions to make the angle for my 8 sided walls its 22.5 degrees, but I cannot figure out the angles to make my walls at 22.5 on a board that is 16" at the bottom and 6" at the top with the 22.5 degrees on each sides on the walls

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What People are Saying:

I have been ordering from Rockler for almost 20 years and have found their products to be very inexpensive and of high quality. Shipping is fast even when an item is back ordered. The best prices I have found anywhere."

- Orval - 08/07/2012
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