🌊 ATM to kPa Converter
Convert pressure from standard atmosphere (atm) to kilopascal (kPa) and other pressure units. 1 atm is exactly 101.325 kPa. Also supports conversions to bar, psi, mmHg, and MPa.
What Is the Standard Atmosphere?
The standard atmosphere (atm) is a unit of pressure defined as exactly 101.325 kPa (kilopascals). It is commonly used to express atmospheric pressure, and is approximately equal to the average atmospheric pressure at sea level on Earth.
The kilopascal (kPa) is a derived unit of pressure in the International System of Units (SI). One kilopascal is equal to 1,000 pascals, and 1 atm = 101.325 kPa.
Other common pressure units include:
- Bar: 1 bar = 100 kPa (1 atm ≈ 1.01325 bar).
- Pounds per square inch (psi): 1 atm ≈ 14.6959 psi.
- Millimeters of mercury (mmHg): 1 atm = 760 mmHg.
- Megapascal (MPa): 1 atm = 0.101325 MPa.
How to Convert ATM to kPa
The formula to convert standard atmosphere to kilopascal is:
kPa = atm × 101.325
For example, to convert 1 atm to kPa:
kPa = 1 × 101.325
kPa = 101.325 kPa
To convert 2.5 atm to kPa:
kPa = 2.5 × 101.325
kPa = 253.3125 kPa
Why Use This Converter?
- Instant results: Convert pressure between multiple units in real-time.
- Step-by-step breakdown: Understand exactly how the conversion is calculated.
- Common reference table: Quickly check pressure conversions from 0.5 atm to 10 atm.
- Free & private: No registration, no data storage — all calculations are done in your browser.
❓ ATM to kPa FAQ
What is the formula to convert atm to kPa?
The formula is kPa = atm × 101.325. For example, 1 atm = 101.325 kPa.
What is the difference between atm and kPa?
Atm (standard atmosphere) is a non-SI unit based on atmospheric pressure at sea level. kPa (kilopascal) is the SI unit of pressure. 1 atm = 101.325 kPa exactly.
How do I convert kPa to atm?
The formula is atm = kPa ÷ 101.325. For example, 101.325 kPa = 1 atm.
What is 1 atm in other pressure units?
1 atm = 101.325 kPa = 1.01325 bar = 14.6959 psi = 760 mmHg = 0.101325 MPa.
What is standard atmosphere used for?
The standard atmosphere is used in meteorology, scuba diving, engineering, and chemistry. It is the reference pressure for many measurements and calculations.
What is the pressure at sea level in atm?
The average atmospheric pressure at sea level is 1 atm (101.325 kPa).
What is the difference between atm and bar?
1 atm = 1.01325 bar. The bar is slightly smaller than the standard atmosphere. The bar is commonly used in meteorology and engineering.
How accurate is this converter?
This converter provides highly accurate results using the standard conversion factors. You can adjust the decimal precision to suit your needs.
Is this converter free?
Yes, this converter is completely free to use. No registration or personal data storage is required.
What is the pressure in a scuba tank?
A standard scuba tank is typically filled to 200 atm (approximately 20,265 kPa or 2,940 psi) at full capacity.