Convert Kilobars to Standard Atmospheres
Convert Kilobars (kbar) to Standard Atmospheres (atm) instantly and accurately.
Conversion Formula
atm = kbar × 986.9232667
About Kilobars
A kilobar (kbar) = 1,000 bar = 100 MPa = 10⁸ Pa - standard in high-pressure geophysics and experimental petrology. Earth mantle phase transitions: olivine → wadsleyite at ~130-140 kbar (410 km depth); post-spinel transition at ~230 kbar (660 km). Diamond anvil cells routinely reach 100-400 kbar for materials synthesis and equation-of-state measurement. High-pressure synthesis of cubic boron nitride (~50 kbar) and superhard materials uses large-volume presses. Explosive shock pressures for mining and demolition: 100-1,000 kbar. 1 kbar = 100 MPa.
About Standard Atmospheres
The standard atmosphere (atm) = exactly 101,325 Pa - defined by the 10th CGPM (1954) as the reference air pressure at sea level. Used to define STP (0°C and 1 atm) for gas law and thermochemistry. Chemical equilibrium constants (Kp), Henry's law solubility, and thermodynamic tables are tabulated at 1 atm. ISA aviation standard: sea-level 1 atm / 15°C, pressure halving every ~5.5 km. Diving physics: +1 atm per 10 m depth (fresh water) so 30 m = 4 atm absolute. Diamond formation in Earth's mantle: ~50,000 atm. 1 atm = 101,325 Pa.
Quick Reference Table
| Kilobars (kbar) | Standard Atmospheres (atm) |
|---|---|
| 1 kbar | 986.923 atm |
| 2 kbar | 1973.85 atm |
| 5 kbar | 4934.62 atm |
| 10 kbar | 9869.23 atm |
| 25 kbar | 24673.1 atm |
| 50 kbar | 49346.2 atm |
| 100 kbar | 98692.3 atm |