Tire Contact Patch Calculator

Inputs

Static corner load (W_s)

Static scale load at this tire.

Load transfer (Delta W)

Signed load added to this tire. Use negative if load is removed.

Aero load (W_a)

Downforce at this tire as mass equivalent.

Tire pressure (P)

Cold or hot inflation pressure. Gauge pressure is a practical approximation for patch area.

bar

Effective tread width (b)

Approximate loaded tread width in contact with the road.

Default result

Normal load

390kg

Pass

Also computed

Normal force3,825N

859.8 lbf

Contact area17,380mm²

Patch length79.02mm

Method notes 2 notes

Contact patch area is approximated as normal force divided by inflation pressure. Tire carcass stiffness and tread shape change the real footprint.
Use this as a load and pressure screen, not as a tire grip model.