What is the correct tire pressure for my car?

Check your door jamb sticker or owner's manual—NOT the tire sidewall. Most passenger cars: 30-35 PSI. SUVs: 32-38 PSI. Trucks: 35-44 PSI. These are 'cold' pressures (before driving).

Should I inflate to the maximum PSI on the tire?

No! The number on the tire sidewall is MAXIMUM safe pressure, not recommended. Over-inflation causes harsh ride, center tire wear, and reduced traction. Use the door jamb placard pressure.

How does load affect tire pressure?

Heavy loads require higher pressure. Many vehicles have separate specs for light/heavy loads on the door sticker. RVs and trucks may need to increase rear pressure 3-5 PSI when loaded.

How often should I check tire pressure?

At least monthly, plus before long trips. Tires naturally lose 1-2 PSI/month. Check when tires are cold (haven't driven for 3+ hours). TPMS warning means pressure is already 25% low.

🛞 Tire Pressure Calculator

Calculate optimal tire pressure adjusted for temperature and load. Proper pressure improves safety, fuel economy, and tire life.

🌡️ Temperature Adjusted 📦 Load Adjusted ⛽ Fuel Savings

🛞 Calculate Optimal Pressure

Recommended Cold Pressure (door sticker)

PSI

Find this on driver door jamb or owner's manual

Current Temperature

°F

Temperature When Placard Was Set

°F

Usually assume 70°F standard

Load Condition

Driving Style

Recommended Tire Pressure

0 PSI

Base Pressure 0 PSI

Temperature Adjustment 0 PSI

Load Adjustment 0 PSI

Driving Adjustment 0 PSI

📐 How We Calculate

$$PSI_{optimal} = Base + TempAdj + LoadAdj + DriveAdj$$

Temperature: +1 PSI per 10°F below 70°F
Heavy Load: +3-5 PSI
Highway: +2-3 PSI for sustained speed

Understanding Tire Pressure

Proper tire pressure is critical for safety, fuel economy, and tire life. Under-inflated tires increase fuel consumption by 3-5%, wear faster on the edges, and can overheat causing blowouts. Over-inflation reduces traction and causes center wear. Finding the right pressure for your conditions optimizes all these factors.

Typical Recommended Pressures

Vehicle Type	Front PSI	Rear PSI	Loaded PSI
Compact Car	32	32	35
Sedan	33	33	36
SUV	35	35	38
Pickup Truck	35	40	44+
Sports Car	32-36	34-38	N/A

🌡️

Temperature Effect

Pressure changes ~1 PSI per 10°F. A 30°F temperature drop (70°F→40°F) loses 3 PSI. Check and adjust seasonally.

⛽

Fuel Economy

Every 1 PSI below optimal costs ~0.2% MPG. 10 PSI low = 2% fuel penalty. Proper inflation saves $100+/year.

🛞

Tire Life

Under-inflation causes 25% faster edge wear. Over-inflation wears center. Proper pressure maximizes tire life.

📝 Example: Winter Adjustment

1 Door sticker: 35 PSI (measured at 70°F)

2 Current temperature: 30°F (40° drop)

3 Temperature adjustment: +4 PSI

4 Target pressure: 39 PSI

5 As temps warm, pressure will naturally return to 35 PSI

"Check tire pressure monthly when tires are cold (haven't driven for 3+ hours). The TPMS warning light only activates when pressure is already 25% low—by then you're losing fuel economy and accelerating wear."

Frequently Asked Questions

❓ Frequently Asked Questions

Check your driver door jamb sticker or owner's manual—NOT the tire sidewall. Most passenger cars run 30-35 PSI, SUVs 32-38 PSI, and trucks 35-44 PSI. These are "cold" pressures, meaning the tire hasn't been driven for at least 3 hours.

Tire pressure changes approximately 1 PSI per 10°F temperature change. Cold winter mornings can drop pressure 5-10 PSI below summer levels. Always check pressure when tires are cold and adjust seasonally as temperatures change significantly.

No! The number on the tire sidewall is the MAXIMUM safe pressure, not the recommended pressure. Over-inflation causes a harsh ride, accelerated center tire wear, and reduced traction. Always use the pressure listed on your door jamb placard instead.

Heavy loads require higher tire pressure. Many vehicles have separate specifications for light and heavy loads printed on the door sticker. RVs and trucks may need to increase rear tire pressure by 3-5 PSI when fully loaded or towing.

Check at least monthly, plus before any long trips. Tires naturally lose 1-2 PSI per month through normal permeation. Always check when tires are cold (haven't been driven for 3+ hours). The TPMS warning light only activates when pressure is already 25% low—well past the point of optimal performance.