Kpa To Atm Conversion
Convert pressure from kilopascals (kPa) to standard atmospheres (atm).
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Converting Pressure: Kilopascals to Atmospheres
Kilopascals (kPa) and standard atmospheres (atm) are both common units used to measure pressure. The conversion between them is crucial in scientific fields like chemistry, physics, and meteorology. This article explains the relationship between these two units and how to convert them.
What is a Kilopascal (kPa)?
The kilopascal is a unit of pressure in the metric system. It is equal to 1,000 Pascals (Pa), where one Pascal is the force of one Newton applied over an area of one square meter. The kPa is widely used globally for expressing pressure because the Pascal itself is a very small unit.
What is a Standard Atmosphere (atm)?
A standard atmosphere (atm) is a unit of pressure defined as the average atmospheric pressure at mean sea level on Earth. It was originally defined as the pressure exerted by a 760 mm column of mercury at 0°C under standard gravity. It serves as a convenient reference point for many physical and chemical processes.
The Conversion Factor
The relationship between atmospheres and Pascals is precisely defined:
1 atm = 101,325 Pa
Since 1 kilopascal (kPa) is equal to 1,000 Pascals, we can easily establish the conversion to atmospheres:
1 atm = 101.325 kPa
From this, we can derive the factor for converting kPa to atm:
1 kPa = 1 / 101.325 atm ≈ 0.00986923 atm
Conversion Formulas:
- To convert from kPa to atm: atm = kPa / 101.325
- To convert from atm to kPa: kPa = atm × 101.325
Example:
If a weather report states the barometric pressure is 99.5 kPa, what is this in atmospheres?
- Using the formula: atm = 99.5 kPa / 101.325
- Result: ≈ 0.982 atm
Pressure Conversion Examples
| Kilopascals (kPa) | Approx. Atmospheres (atm) |
|---|---|
| 50 kPa | 0.493 atm |
| 100 kPa | 0.987 atm |
| 101.325 kPa | 1.000 atm (Standard Pressure) |
| 150 kPa | 1.480 atm |
| 200 kPa | 1.974 atm |
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