Atmospheric Pressure (atm) to KiloPascal (kPa)Conversion
Converting atmospheric pressure (atm) to kilopascal (kpa) is relatively simple after applying the standard conversion factors. But before that, let us first get an overview on these units of measure.
Pressure is defined in science as the amount of force applied to an area. It is the ratio of the force unit to the area over which the force is distributed (P = F/A). It should be noted that only the force perpendicular to the surface of the object is considered in the computation. Mathematically speaking, computing pressure is force divided by the area.
If your looking to convert kPa to atm go here
Pressure doesn’t necessarily have a direction since it is a scalar quantity. If we change the orientation of the objects in contact the surface pressure remains the same even if the directions of the force are already different. Pressure is a fundamental parameter studied intensively in thermodynamic studies.
The SI unit for pressure is the newton per square meter or the “pascal”, named after the brilliant scientist Blasé Pascal. One pascal is a very small unit of pressure comparable to the pressure exerted by a dollar bill on the table. That pressure is negligible! That is why pascal pressure measurements are measured in kilopascals or thousands of pascals. In engineering applications, pressure measurements are usually calculated in the millions of pascals or megapascals.
Non-SI units for pressure include the pounds per square inch and the bar. These units are still used in some countries, even in the United States of America.
Some meteorologists prefer using hectopascal (hPa) for measuring atmospheric air pressure. This unit is equivalent to the older millibar or mbar. The inch of mercury is still used by some meteorologists in the United States. Oceanographers, on the other hand, measure underwater pressure in decibars or equivalent to an increase in depth of one meter.
Now, let’s move on to the atmosphere or atm unit. The standard atmosphere unit is assumed constant. It is equal to the typical air pressure measured at the earth mean sea level. One standard atmosphere or atm is equal to 101,325 pascals or 101.325 kPa or 1,013.35 hPa. In most circumstances, this unit is closely associated with the hydrostatic pressure of the air above the point where the measurement was taken. Low-pressure areas are locations with less atmospheric mass above their location and high pressure areas have more air mass above their location. So, as elevation increases, there will be less air above the location and the atmospheric pressure decreases. Sometimes, in pure SI, the unit kilogram-force is used to express atmospheric pressures (1 atm = 101325kg/sqm). The Greek prefixes
The atm unit is also equivalent to 760 millimeters of mercury, 29.92 inches of mercury or 14.7 pounds (lb) per square inch (psi).
Now let’s proceed to conversion. We are given a pressure in atm or standard atmospheric unit. These measurements may come from scientists practicing in the US or from meteorologists.
Let’s denote the given atm unit in x, so we have x atms. How will we convert it to kpa? Let us apply the conversion constant: 1 atm = 101.325 kPa. Using dimensional analysis, we can then do the math:
X atm multiplied by the conversion factor 101.325 kPa / 1 atm. In this line of computation, the atm unit cancels out and the kPa unit remains. We can now conclude that x atms is equal to 101.325x kPa. In simple terms, convert the atm unit to kPa by just multiplying it with 101.325. Let’s have some concrete examples: if we have 2.5 atms, we will multiply it with 101.325 to convert it to kpa. 2.5 multiplied with 101.325 equals 253.3125 kpa. If we have 4 atms and we have to convert it to kpa, just multiply it with 101.325. 4 times 101.325 equals 405.3 kilopascals (kpa).
On the other hand, if you do it the other way around, convert kpa to atm by dividing the kpa measurement with 101.325. So if we have 200 kpa and we need to express it in terms of atm, we divide it with 101.325. 200 divided by 101.325 results in 1.974 atm.
If you still didn’t get the process, you can access the internet and find hundreds of online conversion calculators where you will input the atm measurement and the calculator displays the equivalent kpa or vice versa. The calculator is coded with the conversion factors needed to perform the required conversion.
Always remember that when performing calculations for scientific observations, the rule on significant figures may be applied. Care should be applied in applying the necessary rounding-off.