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The conversion of 1 atmosphere equals approximately 101.325 kilopascals (kpa).
This is because 1 atmosphere is defined as the pressure exerted by a 760 mm column of mercury at 0°C, which equates to 101.325 kpa. This conversion factor is used widely in science and engineering to switch between pressure units for calculations and measurements.
Conversion Result
1 atmosphere is approximately 101.325 kpa.
Conversion Tool
Result in kpa:
Conversion Formula
The formula to convert atmosphere to kpa is: pressure (kpa) = atmosphere value × 101.325. This works because 1 atm equals 101.325 kpa as per the standard definition. For example, converting 2 atm involves multiplying 2 by 101.325, resulting in 202.65 kpa. This linear relation makes calculation straightforward.
Conversion Example
- Convert 0.5 atm to kpa:
- Multiply 0.5 by 101.325.
- 0.5 × 101.325 = 50.6625.
- So, 0.5 atm equals 50.6625 kpa.
- Convert 1.25 atm to kpa:
- Multiply 1.25 by 101.325.
- 1.25 × 101.325 = 126.65625.
- This means 1.25 atm equals approximately 126.6563 kpa.
- Convert 3 atm to kpa:
- Multiply 3 by 101.325.
- 3 × 101.325 = 303.975.
- Thus, 3 atm equals 303.975 kpa.
Conversion Chart
| Atmosphere | Kpa |
|---|---|
| -24.0 | -2431.8 |
| -20.0 | -2026.5 |
| -15.0 | -1519.9 |
| -10.0 | -1013.3 |
| -5.0 | -506.7 |
| 0.0 | 0.0 |
| 1.0 | 101.325 |
| 5.0 | 506.625 |
| 10.0 | 1013.25 |
| 15.0 | 1519.875 |
| 20.0 | 2026.5 |
| 25.0 | 2533.125 |
| 26.0 | 2634.45 |
Use this chart to quickly find the kpa equivalent for a range of atmospheres. Read across the row to see the conversion value for each atmospheric pressure.
Related Conversion Questions
- How many kpa are in 2 atmospheres?
- What is the pressure in kpa for 0.8 atmospheres?
- Can I convert 1 atm to other units like psi or bar?
- What’s the kpa value for a pressure of 5 atmospheres?
- How do I convert negative atmospheres to kpa?
- Is there a quick way to switch between atm and kpa without calculator?
- What are the standard atmospheric pressure and its kpa equivalent?
Conversion Definitions
Atmosphere
An atmosphere (atm) is a unit of pressure originally based on the average pressure exerted by Earth’s atmosphere at sea level, defined as 101,325 pascals, used to measure pressures in science and engineering.
Kilopascal
Kilopascal (kpa) is a metric pressure unit equal to 1,000 pascals, which measures force per unit area, commonly used in weather forecasting, engineering, and science to express pressure values.
Conversion FAQs
Why is 1 atm equal to 101.325 kpa?
This equivalence stems from the definition of the standard atmosphere, where 1 atm is set as the pressure that supports a 760 mm column of mercury at 0°C. This specific pressure equals 101.325 pascals, or kilopascals when scaled.
How accurate is the conversion from atm to kpa?
The conversion is precise because it is based on a standard definition. Variations in actual atmospheric pressure occur, but for calculations, using 101.325 kpa per atm provides reliable estimates. For highly sensitive measurements, adjustments might be needed.
Can I convert kpa back to atmospheres easily?
Yes, by dividing the kpa value by 101.325, you get the equivalent in atmospheres. For example, 202.65 kpa divided by 101.325 equals 2 atm. This reciprocal calculation allows seamless switching between units.
What are common pressure units used besides atm and kpa?
Other units include pounds per square inch (psi), bar, torr, and pascals. Each has specific applications, with psi common in the US, bar in Europe, and torr used in vacuum measurements. Understanding conversions helps in various scientific and industrial contexts.
