Tire Pressure Calculator
Recommended PSI by vehicle type + instant PSI ↔ kPa converter
REAL-WORLD EXAMPLE
PSI → kPa: 32 PSI = 220.6 kPa · 35 PSI = 241.3 kPa · 38 PSI = 262.0 kPa · 42 PSI = 289.6 kPa. kPa → PSI: 240 kPa = 34.8 PSI · 260 kPa = 37.7 PSI. Tire pressure drops ~1 PSI per 10°F in cold weather. Always confirm against your door placard — a typical compact SUV (RAV4, CR‑V) runs 33–36 PSI cold.
Tire Pressure Converter (PSI ↔ kPa ↔ bar)
Adjust for temperature (rule of thumb: ~1 PSI per 10°F change)
Approx. temperature when you last set pressures (e.g. 70)
Today's ambient temp when checking tires
The cold PSI you originally set (from the placard)
Type in any field below — PSI, kPa or bar — and the other units update instantly. Use this to match the pressures on your vehicle's door placard (often in kPa or bar) to the PSI shown on your gauge.
Pounds per sq. inch — common on US gauges
Kilopascals — often used on OEM placards
Bar — common on EU/workshop gauges
Recommended Tire Pressure by Vehicle Type (Typical Ranges)
| Vehicle Type | Front PSI (Cold) | Rear PSI (Cold) | Notes |
|---|---|---|---|
| Compact Car | 30–34 PSI | 30–34 PSI | Most fall in this range; always follow door placard |
| Mid-Size Sedan | 32–36 PSI | 32–36 PSI | Higher value often for full load |
| SUV / Crossover | 33–38 PSI | 33–38 PSI | Heavier vehicles may need higher PSI |
| Full-Size Truck / Van | 35–45 PSI | 35–50 PSI | Rear often higher when towing or carrying heavy loads |
| Performance Car | 34–38 PSI | 32–36 PSI | Exact PSI strongly depends on model and tire type |
These ranges are general examples based on common passenger vehicles. Your vehicle’s required pressures may differ. Always set tire pressures according to the specific values on your door placard or in your owner’s manual.
How to Use This Calculator
- Start by finding the exact recommended cold tire pressures on your vehicle’s tire information placard (driver’s door jamb, glovebox, or fuel flap) or in the owner’s manual.
- Select your vehicle type in the calculator or enter custom front and rear pressures based on the placard and how heavily the vehicle is loaded.
- Use the built‑in PSI ↔ kPa converter if you need to switch between units (for example, 35 PSI ≈ 241 kPa).
- Apply simple adjustments for temperature changes and heavy loads if your manufacturer provides guidance, then set your cold pressures accordingly and recheck monthly.
Key Tire Pressure Rules & Conversions
About Proper Tire Pressure
Why Correct Tire Pressure Matters
Proper inflation is critical for safety, performance, and tire life. Tires that are too soft flex excessively, build heat, wear on the shoulders, and can dramatically increase stopping distances. Overinflated tires ride harshly, wear in the centre of the tread, and have less grip because their contact patch shrinks. Keeping pressures at the values specified by your vehicle manufacturer helps ensure predictable handling, shorter braking distances, better fuel economy, and longer tread life.
Best Practices for Everyday Drivers
- Check pressures at least once a month and before long trips using a quality gauge.
- Always check and set pressures when the tires are cold (parked several hours or driven less than about a mile).
- Use the vehicle door placard or owner’s manual as your primary reference, not the maximum PSI printed on the tire sidewall.
- If you live in an area with large temperature swings, expect readings to move several PSI between seasons and adjust accordingly.
Special Cases: Towing, Off-Roading & Performance Driving
When towing, carrying heavy loads, or driving off-road, correct tire pressure becomes even more important. Tow vehicles and trailers may call for higher pressures to keep sidewalls from overheating under extra weight, while off-road guides often recommend temporarily lowering pressure at low speeds for better traction on sand or rocks. Performance driving and track use can require specific hot and cold pressure targets. In all of these cases, follow the detailed guidance in your owner’s manual or from your tire manufacturer, and use this calculator only as a supporting tool for conversions and temperature awareness.