Tire Pressure Correction

Seasonal temperature change can dramatically alter tire pressure. The purpose of this utility is to provide a procedure/guideline to adjust tire pressure correctly when tire temperature is something other than the ideal "cold" state and in the real world of driving while in changing weather conditions. Cold weather lowers tire pressure, about 1 psi for every 10°F drop. Set your tires to the door-label number on a mild afternoon, and they can be underinflated by the next cold morning. TP Setter tells you exactly what to inflate to so your tires stay at or above spec, whatever the weather does. HOW IT WORKS • Enter the cold pressure from the tire label on your driver's door • Set the lowest and highest temperatures expected in the next few weeks, or fill them in from your local 10-day forecast with one tap • Choose whether your tires are cold, warm or hot right now • TP Setter shows the pressure to set, with a clear breakdown of every adjustment FEATURES • Local 10-day forecast fills in the low and high temperatures for you • Corrects for warm and hot tires, so you can check pressure right after driving • Works in psi, kPa or bar, and °F or °C • Remembers your vehicle's cold spec and settings • Large, easy-to-read result you can check at the pump • Dark mode and Dynamic Type support • No ads, no accounts, no tracking TIPS • Check your tires at least once a month. Underinflation wears tires faster, hurts fuel economy and affects handling. • Never let air out of warm tires to reach the door-label number. They'll be low once they cool. • Don't forget the spare. TP Setter gives an estimate based on a standard temperature-correction formula. Always follow your vehicle manufacturer's recommendations and use an accurate gauge.