Guides
Plain-English explanations of the formulas, standards and conventions behind the calculators — what each number means, how it’s derived, and the gotchas. Every guide links to the tool that runs the math.
Springs 5 Gears 6 GD&T 5 Machining 9 Materials 4 Hydraulics 5 HVAC 2 Electrical 2 Power Transmission 7 Automotive 1 Aviation 1 Electromechanical 1 Fasteners 5 Sheet Metal 2 Structural 6
Spring rate formula explained For the Compression Spring Calculator The Wahl correction factor For the Compression Spring Calculator How to measure a compression spring, explained For the Spring Rate Calculator How to design a compression spring For the Spring Design Calculator Solid height and coil bind, explained For the Spring Pitch Calculator
How to calculate gear ratio For the Gear Ratio Calculator Gear module vs diametral pitch For the Gear Module Calculator Involute gear geometry For the Involute Gear Calculator How to measure gear teeth, explained For the Span Measurement Over Teeth Calculator Planetary gear ratios, explained For the Planetary Gear Calculator How to calculate gear mesh forces For the Gear Mesh Force Calculator
What is true position in GD&T? For the True Position Calculator How to read GD&T symbols For the True Position Calculator MMC and bonus tolerance For the MMC Bonus Tolerance Calculator ISO limits and fits, explained For the Hole & Shaft Fit Calculator How to calculate interference fit pressure For the Press Fit / Interference Calculator
How to calculate chip load For the CNC Speeds and Feeds Calculator SFM to RPM conversion For the Surface Feet per Minute Calculator Keyway sizes, explained For the Keyway Dimension Calculator Thread classes, explained For the Unified Thread Limits Calculator (2A/2B) Three-wire thread measurement, explained For the Thread Pitch Diameter Calculator How to measure a taper, explained For the Taper Per Foot Calculator How to measure a dovetail, explained For the Dovetail Calculator Countersink depth, explained For the Countersink Depth Calculator Thread pitch and TPI, explained For the Tap Drill Size Calculator
How to size a hydraulic cylinder For the Hydraulic Cylinder Force Calculator Hydraulic cylinder force formula For the Hydraulic Cylinder Force Calculator Pump NPSH, explained For the Pump NPSH Calculator How to lay out a pipe bend, explained For the Pipe Bend Developed Length Calculator Pipe miter cut, explained For the Pipe Miter Cut Calculator
How to calculate belt length For the Belt Length Calculator What is overhung load? For the Overhung Load Calculator Sprocket pitch diameter, explained For the Sprocket Pitch Diameter Calculator How to read a bearing number, explained For the Bearing Life (L10) Calculator Rack and pinion travel and force, explained For the Rack and Pinion Calculator Bearing L10 life, explained For the Bearing Life (L10) Calculator Timing belt length, explained For the Timing Belt Calculator
Bolt preload explained For the Bolt Preload & Torque Calculator Thread engagement explained For the Bolt Shear Strength Calculator Fillet weld size, explained For the Weld Throat Calculator Welding heat input, explained For the Welding Heat Input Calculator How to calculate bolt shear strength For the Bolt Shear Strength Calculator
What is section modulus? For the Section Modulus Calculator Deflection limits: L/360, L/240, L/180 For the Beam Deflection Calculator Shaft torsion & angle of twist For the Shaft Torsion Calculator Square tube deflection, explained For the Square Tube Deflection Calculator How to size an LVL beam, explained For the LVL Beam Calculator How to calculate block shear For the Block Shear Capacity Calculator
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