Tire Contact Patch Calculator
SI
Imp
Imperial
Inputs
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Static corner load
(W_s)
Static scale load at this tire.
lb
Load transfer
(Delta W)
Signed load added to this tire. Use negative if load is removed.
lb
Aero load
(W_a)
Downforce at this tire as mass equivalent.
lb
Tire pressure
(P)
Cold or hot inflation pressure. Gauge pressure is a practical approximation for patch area.
psi
Effective tread width
(b)
Approximate loaded tread width in contact with the road.
in
Results
Default result
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Normal load
859.8
lb
Pass
Also computed
Normal force
859.8
lbf
859.8 lbf
Contact area
Pass
26.95
in²
Patch length
3.111
in
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.
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