Convert ksi to Atmospheres (ksi to atm)
1 ksi = 68.04596391 atmospheres (atm). 1 atm = 0.01469594878 ksi. Example: 15 ksi = 15 × 68.04596391 = 1020.689459 atm.
Also searched as ksi to atm, ksi in atm, ksi into atmospheres, ksi in atmospheres, ksi into atmosphere, ksi to atmosphere, ksi to atmospheres converter and how many atmospheres in a ksi.
1 ksi = 68.04596391 atm
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk ksi to atmosphere converter to paste a column from Excel.
How to Convert ksi to Atmosphere
- 1 ksi = 68.04596391 atm
- 1 atm = 0.01469594878 ksi
- Example: convert 15 ksi to atm: 15 ksi = 15 × 68.04596391 atm = 1020.689459 atm
Formula
atm = ksi × 68.04596390988
Derivation from SI units:
- 1 ksi = 1000 psi = 1 kip/in² = 6.894757293168 MPa
- 1 atm = 101 325 Pa (exact, by definition)
- 1 ksi = 6894757.293168 Pa ÷ 101325 Pa per atm = 68.04596390988 atm
Both units are defined exactly, so the factor is exact. ksi definition: ksi; Atmosphere definition: atmosphere.
Worked examples
- A reading of 20 ksi converts to 1360.919278 atm.
20 ksi × 68.04596391 = 1360.919278 atm - A value of 65 ksi is 4422.987654 atm.
65 ksi × 68.04596391 = 4422.987654 atm
ksi to Atmosphere conversion table
| ksi | Atmospheres (atm) |
|---|---|
| 1 ksi | 68.04596391 atm |
| 3 ksi | 204.1378917 atm |
| 4 ksi | 272.1838556 atm |
| 5 ksi | 340.2298195 atm |
| 10 ksi | 680.4596391 atm |
| 20 ksi | 1360.919278 atm |
| 30 ksi | 2041.378917 atm |
| 36 ksi | 2449.654701 atm |
| 50 ksi | 3402.298195 atm |
| 60 ksi | 4082.757835 atm |
| 65 ksi | 4422.987654 atm |
| 70 ksi | 4763.217474 atm |
| 100 ksi | 6804.596391 atm |
| 150 ksi | 10206.89459 atm |
| 200 ksi | 13609.19278 atm |
Where it's used
ksi are used for yield and tensile strength in ASTM and ASME material specifications, while atmospheres appear in chemistry and gas laws (STP and NTP conditions). Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.
ksi to other pressure units
| Conversion | 1 ksi equals |
|---|---|
| ksi to atmosphere | 68.04596391 atm |
| ksi to pascal | 6894757.293 Pa |
| ksi to kilopascal | 6894.757293 kPa |
| ksi to kilogram-force per square centimetre | 70.30695796 kgf/cm² |
| ksi to psi | 1000 psi |
| ksi to bar | 68.94757293 bar |
| ksi to millimeter of mercury | 51714.9252 mmHg |
| ksi to inch of water | 27679.90471 inH₂O |
Show 12 more units
| ksi to megapascal | 6.894757293 MPa |
|---|---|
| ksi to gigapascal | 0.006894757293 GPa |
| ksi to newton per square millimetre | 6.894757293 N/mm² |
| ksi to kilogram-force per square millimetre | 0.7030695796 kgf/mm² |
| ksi to millibar | 68947.57293 mbar |
| ksi to torr | 51714.93257 Torr |
| ksi to millimeter of water | 703069.5796 mmH₂O |
| ksi to centimeter of water | 70306.95796 cmH₂O |
| ksi to inch of mercury | 2036.020677 inHg |
| ksi to decibar | 689.4757293 dbar |
| ksi to inch of water (60 °F) | 27707.5924 inH₂O (60 °F) |
| ksi to barye | 68947572.93 Ba |
Frequently asked questions
How many atmospheres are in 1 ksi?
1 ksi = 68.04596391 atm.
How do I convert ksi to atmospheres?
Multiply the value in ksi by 68.04596391. For example, 15 ksi × 68.04596391 = 1020.689459 atm.
Is the ksi to atm conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "kip per square inch (ksi)".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "atmosphere, standard (atm)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert ksi to Atmospheres (ksi to atm). Retrieved October 25, 2026, from https://scientificconverters.com/pressure/ksi-to-atmosphere/
IEEE
Scientific Converters, "Convert ksi to Atmospheres (ksi to atm)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/pressure/ksi-to-atmosphere/