Kilopascal is 1000 pascal units.
Kilopascals to Atmospheres Converter — kPa to atm
Convert Kilopascal (kPa) to Atmosphere (atm) using the exact conversion factor (1 kilopascal = 0.0098692327 atmosphere). See the formula, worked examples, conversion table, and common uses.
Kilopascals to Atmospheres converter
Converter
Pressure Converter
Convert pascals, bars, PSI, atmospheres, mercury columns, water columns, and engineering pressure units.
Context values
Some unit families need one extra value for a physically accurate result.
A standard atmosphere is exactly 101,325 pascals.
Result = input x 1000 / 101325.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Kilopascals to Atmospheres
Kilopascal and Atmosphere both show up on pressure gauges — psi is standard on US tire and tool specifications, while bar is the everyday pressure unit across most of the rest of the world. Specifically: Kilopascal is 1000 pascal units, and a standard atmosphere is exactly 101,325 pascals.
Formula
atmospheres = kilopascals × 0.00986923266716
This factor comes from each unit's defined relationship to the category's base unit: 1 kilopascal equals 1000 base units, and 1 atmosphere equals 101325 base units, so dividing one by the other gives the direct kilopascal-to-atmosphere factor of 0.00986923266716.
Simple example
1 kPa × 0.009869232667 = 0.0098692327 atm
1 kilopascal = 0.0098692327 atmospheres.
Real-world example
35 kPa × 0.009869232667 = 0.3454231434 atm
35 kilopascals = 0.3454231434 atmospheres.
Conversion table
| Kilopascal (kPa) | Atmosphere (atm) |
|---|---|
| 1 kPa | 0.0098692327 atm |
| 5 kPa | 0.0493461633 atm |
| 10 kPa | 0.0986923267 atm |
| 25 kPa | 0.2467308167 atm |
| 50 kPa | 0.4934616334 atm |
| 100 kPa | 0.9869232667 atm |
Reverse conversion: Atmosphere to Kilopascal
0.0098692327 atm × 101.325 = 1.000000003 kPa
0.0098692327 atmospheres = 1.000000003 kilopascals.
kilopascals = atmospheres × 101.325
For a page dedicated to this direction, see Atmosphere to Kilopascal.
Understanding the Kilopascal (kPa)
Kilopascal is 1000 pascal units.
Understanding the Atmosphere
Atmosphere (atm) measures pressure. Defined as exactly 101,325 pascals, originally based on the average atmospheric pressure at mean sea level. It is classified as a non-SI unit accepted for use with the SI.
Where it's used: Widely used internationally in chemistry, meteorology, and diving/aviation contexts alongside the pascal and bar
Uses of the Atmosphere today
- Chemistry (standard conditions are often defined at 1 atm)
- Diving and aviation pressure references
- General reference for everyday atmospheric pressure
Atmosphere — sources
- BIPM SI Brochure — Standard atmosphere listed among non-SI units with a fixed exact value in pascals.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many atmospheres are in 1 kilopascal?
1 kilopascal equals 0.0098692327 atmospheres, using the exact defined conversion factor rather than an estimate.
How do I convert kilopascal to atmosphere?
Multiply the kilopascal value by 0.009869232667. The converter above does this instantly to whatever precision you set.
How do I convert atmosphere back to kilopascal?
Use the reverse factor: 1 atmosphere equals 101.325 kilopascals. You can also use the swap control in the converter above to flip the direction instantly.
What is a kilopascal?
Kilopascal (kPa) is a unit of pressure.
What is a atmosphere?
Atmosphere (atm) measures pressure. Defined as exactly 101,325 pascals, originally based on the average atmospheric pressure at mean sea level. It is classified as a non-SI unit accepted for use with the SI.
Is the kilopascal to atmosphere conversion exact?
Yes. Defined as exactly 101,325 pascals, originally based on the average atmospheric pressure at mean sea level. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.