Tire gauges are available at most auto parts stores.
Dial gauges are easier to read than pen or stick designs.
Recommended tire pressures are for cold tires. Therefore, tire pressure should be checked when tires are cold. Checking tire pressure on a car that has hot tires can result in a pressure reading of up to 5 psi higher than the recommended pressure. Look for your tire's recommended air pressure in the vehicle's owner's manual, or inside the driver's side car door or glove compartment. Increase the pressure by 2 to 4 psi when carrying a heavy load or pulling a trailer.