🔧 The Woodworker's Calculator
📏 Unit Conversions
🧮 Fraction ⇄ Decimal
🌲 Board Feet Calculator
Angle Helper
Calculate angles for woodworking jointsCommon Woodworking Angles:
45° Miter: Perfect for picture frames and boxes
90° Square: Standard right angle cuts
22.5°: Half of 45°, for octagonal projects
30° & 60°: For triangular cuts and joints
Bevel vs Miter: Bevel = thickness angle, Miter = width angle
Tip: Use a digital angle finder for precision, and always test on scrap wood first!
Compound Miter
Calculate compound miter anglesCompound Miter Formula:
For Crown Molding:
Miter Angle = arctan(cos(wall angle) × tan(45°))
Bevel Angle = arcsin(sin(wall angle) × sin(45°))
Common Settings:
- Inside corner: Miter 31.6°, Bevel 33.9°
- Outside corner: Miter 31.6°, Bevel 33.9°
- Spring angle 45°: Most common crown molding
Steps:
- Measure wall angle with digital gauge
- Set miter saw to calculated angles
- Test cut on scrap material
- Adjust as needed for perfect fit
Stair Stringer
Calculate stair stringer dimensionsStair Stringer Calculations:
Rise & Run Formula:
Total Rise ÷ Number of Steps = Individual Rise
Total Run ÷ (Number of Steps – 1) = Individual Run
Code Requirements:
Rise: 7-7.75 inches maximum
Run: 10 inches minimum
Rise + Run should equal 17-18 inches
Cutting Steps:
- Mark rise and run on framing square
- Use stair gauges for consistent layout
- Cut top and bottom angles
- Use first stringer as template
- Check level and square before installing
Wood Weight
Calculate wood weight by speciesWood Weight Calculator:
Common Wood Densities (lbs/ft³):
Oak: 47 lbs/ft³
Maple: 44 lbs/ft³
Pine: 25 lbs/ft³
Cedar: 23 lbs/ft³
Walnut: 40 lbs/ft³
Cherry: 35 lbs/ft³
Mahogany: 35 lbs/ft³
Weight Formula:
Weight = Length × Width × Thickness × Density
Example: A 2×4×8 pine board:
2″ × 4″ × 96″ × 25 lbs/ft³ ÷ 1,728 = 11.1 lbs