Design Your Suspension Geometry & Generate Hard Points Automatically

• Build and analyze your suspension geometry with this Excel-based Suspension Geometry Calculator.
• Simply enter your design parameters in the yellow input cells, and the spreadsheet calculates the suspension geometry, hard point locations, roll centre movement, camber change, tyre scrub, wheel heave, and more.

Perfect for Formula Student, Baja SAE, motorsport teams, automotive engineers, vehicle designers, and engineering students.

What You Need to Input

• All yellow cells are user inputs.

Suspension Geometry Parameters

• Roll centre height from ground
• Virtual swing axle transverse length
• Scrub radius
• Kingpin inclination angle
• Lower outer suspension arm hard point height
• Upper outer suspension arm hard point height
• Lower suspension arm length
• Upper suspension arm length
• Caster angle
• Mechanical trail
• Lower inner hard point longitudinal distance
• Lower inner forward point distance ahead of the contact patch
• Upper inner hard point longitudinal distance
• Upper inner forward point distance ahead of the contact patch
• Spring or pushrod lower attachment transverse coordinate
• Spring or pushrod lower attachment vertical coordinate
• Spring or pushrod upper attachment transverse coordinate
• Spring or pushrod upper attachment vertical coordinate]

What You Get as Output

• After entering your design inputs, the calculator generates

Suspension Hard Point Coordinates

• Tyre contact patch reference point
• Roll centre position
• Instant centre position
• Lower outer suspension hard point
• Lower inner forward hard point
• Lower inner rearward hard point
• Upper outer suspension hard point
• Upper inner forward hard point
• Upper inner rearward hard point
• Spring or pushrod attachment coordinates

Suspension Movement Analysis

For different wheel bump positions, the sheet calculates:

• Roll centre height
• Roll centre movement
• Tyre lateral scrub
• Camber angle
• Camber change
• Wheel heave
• Ratio of roll centre height change to wheel heave
• Ratio of camber change to wheel heave
• Roll centre height during chassis roll

Additional Calculations

The calculator also performs background calculations for:

• Roll centre axis angle
• Instant centre height
• Lower suspension arm angle
• Lower suspension arm transverse and vertical span
• Upper suspension arm angle
• Upper suspension arm transverse and vertical span
• Inner lower wishbone pickup location
• Inner upper wishbone pickup location

 How It Works

Enter Your Parameters → 📐 Generate Suspension Geometry → 📊 Analyze Wheel Movement → 🔧 Optimize Your Design

Design. Calculate. Analyze. Optimize.