# Do tire gauges measure absolute pressure?

## Do tire gauges measure absolute pressure?

You can use an absolute pressure gauge to measure the tire pressure and this is actually very common. The reading would be PSIA instead of PSIG so the absolute pressure reading would need to be converted to gauge.

**Should I use gauge or absolute pressure?**

If you want to measure pressure that is affected by atmospheric pressure — in closed systems or sealed containers, when assessing altitude in aeronautic applications, or when you need to measure the atmospheric pressure, itself, for example — you require an absolute pressure gauge.

**What is absolute pressure gauge pressure?**

Absolute pressure is measured relative to a full vacuum. In contrast, pressure that is measured against atmospheric pressure (also known as barometric pressure) is called gauge pressure. A full vacuum has an absolute pressure reading of 0 PSIA and average barometric pressure at sea level is ~14.7 PSIA.

### What’s the difference between absolute and gauge pressure?

where P a b s is absolute pressure, P g is gauge pressure, and P a t m is atmospheric pressure. For example, if your tire gauge reads 34 psi (pounds per square inch), then the absolute pressure is 34 psi plus 14.7 psi (P a t m in psi), or 48.7 psi (equivalent to 336 kPa).

**How much pressure does a tire pressure gauge apply?**

Since its cross-section is 1 square inch, it exerts 1 pound per square inch of force (1 psi) on your toe. If you were to take a 30-foot-long piece of the same wood and balance it on your foot, it would apply 10 psi of pressure. If it were 300 feet long, it would apply 100 psi, and so on.

**Which is the best tire gauge to buy?**

Tire Gauge for Car and Trucks Tires by Vondior . . . . Tire Pressure Gauge – (0-100 PSI) Heavy Duty, Certified ANSI Accurate with Large 2 Inch Easy to Read Glow Dial, Low – High Air Pressure Gauge.

#### What does PSI stand for in tire pressure?

We carry a variety of analog and digital air pressure gauges from reliable brands like Milton and Slime that can measure up to 150 PSI or even more. PSI stands for pounds per square inch, the industry standard for measuring tire air pressure.