To convert psi to psig, multiply **the psig number** by atmospheric pressure. The pressure in the atmosphere is 101,325 pascals, or 101,325 newtons per square meter. For example, if you're converting a 50-psi pressure, 50-1.496 Equals 35.3. This is the pressure in pounds per square inch (psig).

Pressure, in general, is a force acting on a surface area; the psi unit measures pressure as pounds of force per square inch of area. However, pounds per square inch gauge (psig) is the pressure differential between a supply tank and the outside air; it disregards ambient pressure. So, if you have a tank with 10 psi inside and 20 psi outside, the tank will blow up like a balloon!

The figure you need to know for your vehicle is called brake specific output. This shows **how much pressure** your brakes will bring up when they are fully applied. It is usually found in the owner's manual or online. For example, a typical car has **15 psi** at **100 miles** per hour, so its brake specific output is 150 psig.

As you can see, there are many different ways to measure pressure. Never trust anything other than direct measurement from a psi gauge when working with brakes or tires. Using estimated values can cause you to use excessive force which could lead to damage of some kind to your braking system.

An online calculator containing formulae, examples, and tables for converting atmospheres to pounds per square inch (atm to psi). Our converters make it simple to switch between pressure units. The following is a list of definitions for atmospheres and psi conversions. As you can see, there are close relations between these two parameters.

Atmospheres are the absolute pressure that exists at **any given temperature** above absolute zero (–459.66°F or –273.15°C). The standard atmosphere is 101,325 Pa (or 0.101325 kPa), but many other values are used in science and technology. Earth's atmosphere has a mean density of 1 kilogram per cubic meter or 0.6 lb/in3; a plane flying at 6,000 meters (20,000 feet) experiences a pressure drop of about 2 kilopascals (kPa).

Psi are expressed by the symbol Ψ and have been called "the universal pressure unit". It is defined as the force required to elevate one gram of water one meter (1 m = 39.37 inches or 100 cm). The conversion factor from atm to psi is actually the ratio of pressures at **different temperatures**. At **sea level** and 0°C, this ratio is 10.5 psi (69 kPa); at higher altitudes or temperatures, the value will be lower.

The most straightforward method is to use **the standard 1 atmosphere** as a conversion factor. 1 atm = 760 mm Hg 1 atm = **14.7 psi** As a result, 760 mm Hg Equals 14.7 psi. When both sides of the equation are divided by 760, the result is 1 mm Hg = 0.019 psi. Or, 14.7 psi / 760 = 0.019 in Hg.

There are several other methods for converting mm Hg to psi. One common approach is to use the first formula and then multiply it by some number. For example, if you wanted to convert 30 mm Hg to psi, you could say that 30 mm Hg = 3 psi. Multiply this by the conversion factor to get 84 psi. This works because 3 x 14.7 = 51.4 which is close to 50 so no accuracy was lost by using this method.

Another method is to use formulas that involve **the pressure ratio**. The pressure ratio is the ratio of two pressures measured at the same point but on **opposite sides** of a wall. It is usually expressed as a percentage. For example, if there are two chambers connected by a hole where one chamber has air while the other has water, the pressure ratio between them would be 100% since there is no barrier between them.

Now, let's say we have another hole with water in between these two chambers. We can measure the pressure inside each chamber and then subtract their values to get a difference value.

PSIG is the unit for gauge pressure, whereas PSIA is the unit for absolute pressure. By adding or subtracting atmospheric pressure, you may convert between them. At sea level, the atmospheric pressure is 14.7. If there are no other pressures involved, then this would be all that is needed to determine whether a pipe is flexible or not. However, if another source of pressure is present (such as when pumping water through a well pipe), then this must be taken into account.

To calculate PSIA, first find **the gauge pressure**. Gauge pressure is simply the pressure of the gas inside the pipe divided by the number of gallons per square inch of **internal diameter** of the pipe. For example, if the pressure is 100 psi and the pipe has an ID of **4 inches**, then the gauge pressure is 25 psi. This can be done by dividing the pressure by the ID, then multiplying by 60 to get the value in PSIA. So, 100 / 4 = 25 x 60 = 1500 PSIA. The pipe is considered rigid enough not to be affected by gravity if it can withstand 1500 PSIA.

Because atmospheric pressure varies based on height, so too does its effect on gauge pressure. At any given location, the percentage of gauge pressure due to atmosphere is called the elevation factor.

You are now converting psi to kilos-force/square centimeter pressure units. 1 Psi (1 Psi) = 0.07031 Kilogram-force per Square Centimeter (kg/cm2) Psi: Psi is an acronym for pounds per square inch and is frequently used in the United Kingdom and the United States. It is a unit of force that equals 10 Pa or 100 N, depending on which country you are in. The value of 1 Psi can be converted to kilograms by using our conversion factor.

Psig (Gauge Pressure): a pressure measurement in psi that is referenced to **atmospheric pressure**. A Psid (Pressure Differential) is a measurement of the pressure differential between **two points**.

Psids are usually measured with a pressure sensor, but they can also be calculated from **other measurements** such as height, temperature, and wind speed. Psids are used to estimate **the flow rate** of air into buildings, etc.

Psigs are commonly used by utilities to estimate the volume of air flowing through air conditioners and heat pumps. The difference in pressure between the outdoor and indoor units of an air-conditioning system or the hot and cold legs of a heat pump is usually quite small (around 1/10 of a psi), so large pressure sensors are needed to measure them accurately.

The term "psid" comes from the fact that early pressure sensors were based on the design of Bourdon tubes, which exhibit a linear change in pressure over a relatively wide range of pressures. To make a sensor that would measure low pressures more accurately, engineers introduced a second tube inside the first, of slightly smaller diameter. The two tubes formed a "U"-shaped cavity with their open ends facing outwards. When pressure was applied to the outside of the tube, the two ends moved apart from each other, changing the size of the cavity.