Or, one-foot column of water that’s 1-inch square weighs. Translated, that means that a column of water that’s 1-inch square and 2.31 feet tall will weigh 1 pound. How do you calculate pressure in psi? The relationship between PSI and feet of head is that 2.31 feet of head = 1 PSI. Low tire pressure always is more dangerous than high tire pressure. For you, 10 percent would be a little less than 30 psi. Most tire-pressure monitoring systems warn you when your tire pressure drops by about 10 percent. So make sure you check your tire pressure after a long stay and usually, you can do it in the early morning. Normal tire pressure is usually between 32~40 psi(pounds per square inch) when they are cold. So, in your case, I’d recommend that you put 35 or 36 psi in the tires and just leave it there.Īlso Is 40 psi too high for tires? If there’s no sticker, you can usually find the info in the owner’s manual.

Higher pressure generally is not dangerous, as long as you stay well below the “maximum inflation pressure.” That number is listed on each sidewall, and is much higher than your “recommended tire pressure” of 33 psi, Gary. How is kPa calculated? 1 kPa = 760/101.325 = 7.5 mmHg atm = atmosphere kPa = kilo Pascal mmHg = millimetres of mercury. In many Asian countries, such as India and Korea, the unit “kilogram per square centimetre (kg/cm²)” is found quite often. In North America, the preferred pressure unit is “psi (pounds per square inch)”. Which countries use kPa for blood pressure? In contrast, in Australia and China the units “kilo-Pascal (kPa)” and “mega-Pascal (MPa)” have become established.

33 psi to kpa