1. Spur Gear Calculator
Spur gears are the most common type of gear used for transmitting motion between parallel shafts. Precise tooth profiling is essential to prevent noise and premature wear.
Key Inputs: Number of teeth, Module or Diametral Pitch (DP), and Pressure Angle.
Outputs: Pitch Diameter, Outside Diameter, and Root Diameter.

2. Helical Gear Calculator
Helical gears offer smoother and quieter operation than spur gears due to the gradual engagement of teeth. However, the helix angle adds a layer of mathematical complexity.
Key Inputs: Helix angle, Hand of Helix (Left/Right), and Normal Module.
Outputs: Transverse Pitch, Lead of the Helix, and Axial Pitch.

3. Bevel Gear Calculator
Used for intersecting shafts (usually at 90°), bevel gears require complex calculations for pitch cones and mounting distances.
Key Inputs: Gear ratio, Shaft angle, and Pitch diameter.
Outputs: Pitch Cone Angle, Face Angle, and Back Cone Radius.