Tire Pressure Calculator
Tire pressure changes with the weather and your cargo. Enter your recommended cold PSI, the current temperature, and any extra load to see the adjusted pressure you should aim for. Properly inflated tires improve fuel economy, tire life, and handling.
Key pressure rules:
- Temperature: Tires gain or lose about 1 PSI for every 10F change in ambient temperature
- Load: Add roughly 1 PSI for every 100 lbs of extra cargo
- Warm tires: Read 3-5 PSI higher than cold tires after driving
- Always set pressure cold -- before driving or after the car has sat for 3+ hours
Where to find your recommended PSI:
- Driver's side door jamb sticker
- Owner's manual
- Inside the fuel filler door (some vehicles)
- NOT the number on the tire sidewall -- that is the maximum, not the recommendation
Consequences of wrong pressure:
- Under-inflated: worse fuel economy (up to 3%), faster edge wear, overheating risk, poor handling
- Over-inflated: harsh ride, center tread wear, reduced traction, higher blowout risk on hot days