Compound Miter & Splayed Leg Saw Bevel Angle Calculator
Calculate exact table saw / miter saw Miter Angle and Blade Bevel Tilt Angle to join sloped sides on 4, 6, 8, or custom-sided tapered planters, kitchen range hoods, pyramid roofs, and splayed furniture legs.
0° = Straight vertical box. 10°–20° = Typical tapered planter or splayed stool.
Exact Saw Calibration Settings
Saw Miter Gauge Angle
10.73°
79.27° from fence
Blade Bevel Tilt Angle
43.08°
46.92° to table
Live Tapered Hopper & Blade Tilt Geometry
Compound Miter & Blade Bevel Reference Table (4, 6 & 8 Sides)
Pre-calculated Miter Angle and Blade Bevel Tilt settings (from 0° square) for common workshop splay angles.
| Wall Splay Angle | 4-Sided Box (Miter / Bevel) | 6-Sided Hexagon (Miter / Bevel) | 8-Sided Octagon (Miter / Bevel) |
|---|---|---|---|
| 5° Slope | 3.54° Miter / 44.78° Bevel | 4.33° Miter / 29.87° Bevel | 4.62° Miter / 22.41° Bevel |
| 10° Slope | 7.11° Miter / 44.13° Bevel | 8.68° Miter / 29.50° Bevel | 9.25° Miter / 22.15° Bevel |
| 15° Slope | 10.73° Miter / 43.08° Bevel | 13.06° Miter / 28.88° Bevel | 13.90° Miter / 21.70° Bevel |
| 20° Slope | 14.43° Miter / 41.64° Bevel | 17.49° Miter / 28.02° Bevel | 18.59° Miter / 21.08° Bevel |
| 30° Slope | 22.21° Miter / 37.76° Bevel | 26.57° Miter / 25.66° Bevel | 28.07° Miter / 19.38° Bevel |
Frequently Asked Questions
What are the exact trigonometric formulas for compound miter and bevel angles?
For any regular polygon with N sides and a splay/slope angle S (measured from vertical), the Corner Half-Angle is C = 180° / N. The Table Saw Miter Gauge Angle (from 90° crosscut) is Miter = arctan(tan(S) × cos(C)), and the Saw Blade Bevel Tilt Angle (from 90° vertical) is Bevel = arcsin(cos(S) × sin(C)).
What is the miter and bevel angle for a 4-sided tapered planter with a 15-degree slope?
For a 4-sided square planter or range hood with walls tilted outward at 15 degrees from vertical, set your miter gauge to 10.73 degrees and tilt your saw blade bevel to 43.08 degrees.
How do you set compound angles on a miter saw vs a table saw?
Both tools use the exact same Miter Angle (displacement from a 90° straight crosscut) and Bevel Tilt Angle (displacement from a 90° vertical blade cut). Always verify with a digital angle finder on the saw plate before cutting final hardwood stock.
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