1 atmosphere equals approximately 101.325 kilopascals (kpa). This means that when you convert 1 atmosphere to kpa, the result is about 101.325 kpa.
Conversion from atmosphere to kilopascal is based on the fact that 1 atmosphere represents the pressure exerted at sea level by a 1-meter column of mercury, which is exactly defined as 101.325 kpa. Therefore, multiplying the atmosphere value by 101.325 gives the pressure in kpa.
Conversion Result
1 atmosphere is equal to 101.325 kpa.
Conversion Tool
Result in kpa:
Conversion Formula
The formula to convert atmosphere to kpa multiplies the given atmosphere value by 101.325 because 1 atmosphere equals exactly 101.325 kilopascals. This works because the pressure in kpa is a direct, proportional measure of atmospheric pressure. For example, if you have 2 atmospheres, you multiply 2 by 101.325 to get 202.65 kpa. The multiplication ensures the conversion maintains the correct scale, based on the standard atmospheric pressure at sea level.
Conversion Example
- Example 1: Convert 2 atmospheres to kpa.
- Step 1: Take the value in atmospheres, which is 2.
- Step 2: Multiply by 101.325 (conversion factor).
- Step 3: 2 x 101.325 = 202.65.
- Result: 2 atmospheres equal 202.65 kpa.
- Example 2: Convert 0.5 atmospheres to kpa.
- Step 1: Take 0.5 as the atmosphere value.
- Step 2: Multiply 0.5 by 101.325.
- Step 3: 0.5 x 101.325 = 50.6625.
- Result: 0.5 atmospheres is about 50.6625 kpa.
- Example 3: Convert 5 atmospheres to kpa.
- Step 1: Atmosphere value is 5.
- Step 2: Multiply by 101.325.
- Step 3: 5 x 101.325 = 506.625.
- Result: 5 atmospheres equal roughly 506.625 kpa.
Conversion Chart
| Atmosphere | Kpa |
|---|---|
| -24.0 | -2431.8 |
| -23.0 | -2340.975 |
| -22.0 | -2249.15 |
| -21.0 | -2157.325 |
| -20.0 | -2065.5 |
| -19.0 | -1973.675 |
| -18.0 | -1881.85 |
| -17.0 | -1789.025 |
| -16.0 | -1696.2 |
| -15.0 | -1604.375 |
| -14.0 | -1512.55 |
| -13.0 | -1420.725 |
| -12.0 | -1328.9 |
| -11.0 | -1237.075 |
| -10.0 | -1145.25 |
| -9.0 | -1053.425 |
| -8.0 | -961.6 |
| -7.0 | -869.775 |
| -6.0 | -777.95 |
| -5.0 | -686.125 |
| -4.0 | -594.3 |
| -3.0 | -502.475 |
| -2.0 | -410.65 |
| -1.0 | -318.825 |
| 0.0 | 0.0 |
| 1.0 | 101.325 |
| 2.0 | 202.65 |
| 3.0 | 303.975 |
| 4.0 | 405.3 |
| 5.0 | 506.625 |
| 6.0 | 607.95 |
| 7.0 | 709.275 |
| 8.0 | 810.6 |
| 9.0 | 911.925 |
| 10.0 | 1013.25 |
| 20.0 | 2026.5 |
| 26.0 | 2633.85 |
This chart helps you quickly find the approximate pressure in kpa for given atmosphere values, both positive and negative. To use, locate your atmosphere value along the first column, then read across to see the corresponding kpa value.
Related Conversion Questions
- How many kilopascals are in 1.5 atmospheres?
- What is the pressure in kpa for 0.75 atm?
- How do I convert 2 atmospheres to kilopascals manually?
- What is the equivalent of 5 atmospheres in kpa?
- Can I convert negative atmospheres to kpa?
- What is the pressure in kpa at 10 atmospheres?
- How does atmospheric pressure change with altitude in kpa?
Conversion Definitions
Atmosphere
An atmosphere is a unit of pressure that measures the force exerted on a surface by the weight of air above it at sea level, standardized as exactly 101.325 kilopascals, used to describe pressure in meteorology, physics, and engineering.
Kilopascal (kpa)
The kilopascal is a metric unit of pressure equal to 1000 pascals, where a pascal represents one newton per square meter. It measures force applied over an area, used in various scientific and technical contexts to describe pressure levels.
Conversion FAQs
Why is the conversion factor from atmosphere to kpa 101.325?
This value is based on the standard atmospheric pressure at sea level, defined exactly as 101.325 kilopascals, making it the fixed multiplier when converting between these units. It ensures consistency across scientific and engineering calculations.
Can atmospheric pressure vary when converting to kpa in different locations?
Yes, actual atmospheric pressure varies with altitude, weather, and location, but the conversion factor (101.325) is a standard reference. For precise measurements, local atmospheric pressure readings should be used, then converted to kpa accordingly.
How accurate is the conversion from atmospheres to kpa?
The conversion is accurate as long as standard atmospheric conditions are assumed. Variations in real-world atmospheric pressure may cause slight differences, but for most purposes, multiplying by 101.325 provides a reliable estimate.