Car Tire Pressure Calculator

Recommended car pressures

Front {{ axles[0].targetPsiDisplay }} / Rear {{ axles[1].targetPsiDisplay }}

{{ axles[0].targetBarDisplay }} front · {{ axles[1].targetBarDisplay }} rear

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Vehicle class:

Baseline:

Door placard (cold): Front psi Rear psi

Curb weight:

Passengers: people {{ weight_unit }}

Cargo weight: {{ weight_unit }}

Front tire width: mm

Rear tire width: mm

Front axle share:

{{ front_share_percent }}%

Surface:

Priority:

Tire setup:

Front tire max:

psi

Rear tire max:

psi

Safety note

Use your door placard or owner’s manual as the source of truth and set pressures when tires are cold. Never exceed the tire sidewall maximum.

#	Axle	Load	Target	Range	Safe	Copy
{{ row.index }}	{{ row.axle }} {{ row.note }}	{{ row.loadKgDisplay }} {{ row.loadLbDisplay }}	{{ row.targetPsiDisplay }} {{ row.targetBarDisplay }}	{{ row.bandPsiDisplay }} {{ row.bandBarDisplay }}	{{ row.safeRangeDisplay }} {{ row.safeBarDisplay }}
Enter values to see recommendations.

Payload curve shows how added passengers and cargo change front and rear targets while tire sizes stay fixed.

Tags: Diagnostics , Transport

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Car tire pressure affects grip, braking, comfort, and tire wear. Underinflation can build heat and reduce stability, while overinflation can reduce the contact patch and make the ride feel harsh. The best starting point is always the manufacturer recommended cold pressure shown on the door placard or in the owner’s manual.

This calculator helps you estimate reasonable front and rear targets as passenger and cargo load changes. Use it as a planning and double check tool before road trips, winter temperature swings, or days when you carry more weight than usual.

Set pressures when tires are cold. If you check after driving, the pressure will read higher, and you should not bleed air to match a cold target.

Technical Details

The computation starts from a baseline front and rear pressure, either a generic preset for the selected vehicle class or your door placard values. It then adjusts for loaded weight, tire width, and driving bias factors that nudge pressure toward comfort, efficiency, or handling.

The tool splits total loaded weight across axles using the configured front axle share, then computes a target pressure per axle and clamps it into a safe window. You can optionally provide front and rear tire maximum pressures from the sidewall to clamp the safe window more conservatively for your exact tire.

Safety. Always follow the door placard and the tire load and pressure rating. Do not exceed the sidewall maximum pressure, and use manufacturer guidance for towing and heavy loads.

Units and outputs

Weight inputs support kilograms and pounds.
Pressures are reported in psi and bar for quick comparison.
The payload chart sweeps total loaded weight while keeping your tire sizes and axle share fixed.

FAQ

Where do I find the recommended pressure?

Most vehicles list the cold pressure on a sticker inside the driver door jamb. Some models also list an alternate pressure for maximum load.

Why do front and rear targets differ?

Front and rear axle loads are rarely the same, and some vehicles use different tire sizes. Separate targets help each axle maintain similar support and handling.