Atmospheres (atm) to Kilopascals (kPa) Conversion
Atmospheres
The standard atmosphere (atm) is a unit of pressure defined as exactly 101,325 Pa, representing the approximate mean atmospheric pressure at sea level. It remains in use in chemistry for expressing gas pressures in thermodynamic tables and standard conditions (STP: 0 °C and 1 atm). One atmosphere supports a mercury column of exactly 760 mm — the basis of the mercury barometer invented by Torricelli in 1643. In deep-sea diving, pressure is expressed in atmospheres absolute (ATA).
Kilopascals
The kilopascal (kPa) is a unit of pressure equal to exactly 1,000 pascals and is one of the most practical pressure units for everyday engineering. Standard atmospheric pressure is approximately 101.3 kPa. Tyre pressure is commonly specified in kPa in metric countries: a typical car tyre is inflated to 220–250 kPa. Blood pressure in clinical settings is measured in mmHg, but some medical devices express it in kPa (normal systolic ≈ 16 kPa).
| Atmospheres (atm) | Kilopascals (kPa) |
|---|---|
| 0.1 atm | 10.1325 kPa |
| 1 atm | 101.325 kPa |
| 2 atm | 202.65 kPa |
| 3 atm | 303.975 kPa |
| 5 atm | 506.625 kPa |
| 10 atm | 1013.25 kPa |
| 20 atm | 2026.5 kPa |
| 30 atm | 3039.75 kPa |
| 50 atm | 5066.25 kPa |
| 100 atm | 10132.5 kPa |
| 1000 atm | 101325 kPa |
Frequently Asked Questions (FAQ)
How many kilopascals are in 1 atmospheres?
1 atmospheres (atm) is exactly 101.325 kilopascals (kPa).
How do I convert atmospheres to kilopascals?
Multiply the value in atmospheres by 101.325 to get the result in kilopascals. Or use the converter above — type any number and see the result instantly.