Tire Pressure Check Calculator
Estimate tire pressure changes with temperature and calculate fuel economy impact of underinflation.
Temperature-Adjusted PSI
28.0 psi
Temperature-Adjusted PSI vs Recommended Tire Pressure
Tire Pressure and Temperature
Tire pressure changes by approximately 1 PSI for every 10°F change in temperature. Underinflated tires waste fuel and wear unevenly.
Rules of Thumb
Temperature Adjustment: ~1 PSI per 10°F change
Fuel Penalty: ~0.2% per 1 PSI below recommended
For every 1 PSI underinflated across all four tires, fuel economy drops about 0.2%. At 5 PSI under, that is 1% worse mileage and significantly accelerated tire wear.
Example Calculation
Tires at 30 PSI (recommended 35) with a 20°F temperature drop.
- 01Temperature effect = -20 / 10 = -2 PSI
- 02Adjusted pressure = 30 + (-2) = 28 PSI
- 03Underinflation = 35 - 30 = 5 PSI
- 04Fuel penalty = 5 x 0.2% = 1.0%
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