How does temperature affect tire pressure?

Pressure changes roughly 1-2 PSI for every 10°F change in temperature.

How is adjusted tire pressure calculated?

Applying the expected pressure change based on the temperature difference.

Why does this matter for seasonal maintenance?

Tires set correctly in warm weather can become underinflated in cold weather.

Tire Pressure Temperature Adjustment Calculator

Tire pressure rises and falls with temperature — roughly 1 psi for every 10°F change — because the air inside behaves according to the gas laws.

Current Pressure (psi)

Current Temperature (°F)

New Temperature (°F)

Instant Result

Adjusted Pressure -

What Is a Tire Pressure Temperature Adjustment Calculator?

Tire pressure rises and falls with temperature — roughly 1 psi for every 10°F change — because the air inside behaves according to the gas laws. This calculator estimates your tire's new pressure when the temperature changes, so you can set it correctly on a cold morning or before a hot track day.

How to Use This Tire Pressure Temperature Adjustment Calculator

Enter your current tire pressure in psi.
Enter the current air (or tire) temperature in °F.
Enter the new temperature you're adjusting for.
Click Calculate to get the adjusted tire pressure.

Formula

P2 = (P1 + 14.7) × (T2 / T1) − 14.7, with T in absolute Rankine (°F + 459.67)

Worked Example

A tire is at 32 psi at 50°F overnight, and you want the expected pressure at 80°F. T1 = 509.67°R, T2 = 539.67°R. P2 = (32+14.7) × (539.67/509.67) − 14.7 ≈ 34.4 psi — showing pressure rises as the tire warms up.