Convert pressure units — Pascal, bar, PSI, atm, Torr, mmHg.
| Unit | Name | Value |
|---|---|---|
| Pa | Pascal | 101325 |
| kPa | Kilopascal | 101.325 |
| bar | Bar | 1.01325 |
| psi | PSI | 14.695943 |
| Torr | Torr / mmHg | 760.0021 |
| inHg | Inch of Mercury | 29.921244 |
Formula: Kilopascal = Atmosphere × 101.3
Multiply any atmosphere value by 101.3 to get kilopascal.
Reverse: Atmosphere = Kilopascal × 0.009869
Common atmosphere values — factor: 1 atm = 101.3 kPa
| Atmosphere (atm) | Kilopascal (kPa) | Context |
|---|---|---|
| 0.001 atm | 0.1013 kPa | Vacuum |
| 0.01 atm | 1.013 kPa | High vacuum |
| 0.1 atm | 10.13 kPa | Mountain top |
| 0.5 atm | 50.66 kPa | Half atmosphere |
| 1 atm | 101.3 kPa | Sea level |
| 2 atm | 202.7 kPa | 10 m water depth |
| 5 atm | 506.6 kPa | 40 m depth |
| 10 atm | 1,013 kPa | 90 m depth |
| 50 atm | 5,066 kPa | 500 m depth |
| 100 atm | 1.013e+04 kPa | 1 km depth |
| 500 atm | 5.066e+04 kPa | 5 km depth |
| 1,000 atm | 101,300 kPa | 10 km depth |
| 5,000 atm | 506,600 kPa | Deep mantle |
| 1e+04 atm | 1,013,000 kPa | Very deep mantle |
| 5e+04 atm | 5,066,000 kPa | Diamond formation |
1 atm = 101.3 kPa. Memorize for instant estimates.
Use 101.3 as a quick mental multiplier.
Multiply result by 0.009869 to recover the original atm value.
Uses atmospheres in gas law calculations (PV = nRT) and solubility studies.
Calculates dive depth pressure (every 10 m adds ~1 atm) for dive tables.
Designs diamond anvil cell experiments measuring pressure in thousands of atm.
Specifies autoclave and reactor operating pressures relative to atm.
Estimates metamorphic rock formation pressures in kbar (thousands of atm).
Plans saturation diving operations using atm for depth-pressure calculations.
The atmosphere (atm) is defined as exactly 101,325 pascals — the approximate air pressure at sea level. It was originally defined as the average atmospheric pressure at sea level at 45° latitude, and has been a standard reference since the 17th century.
Atmospheres are used in chemistry (gas laws), scuba diving depth calculations (every 10 m of water ≈ 1 additional atm), and as a convenient reference for extreme pressure comparisons.
Interesting fact: Jupiter's atmosphere has pressures exceeding 1,000 atm at depth. Diamond formation in Earth's mantle requires pressures of 45,000–60,000 atm at depths of 150–200 km.
The kilopascal (kPa) equals 1,000 pascals and is the practical everyday pressure unit in metric countries. It is the standard unit for tire pressure, blood pressure, and weather maps in countries using SI.
Blood pressure in many countries is expressed in kPa (normal: ~16/10.7 kPa), though mmHg remains dominant in medicine. Car tire pressure is typically 200–250 kPa. Weather maps use hPa (= mbar) for atmospheric pressure.
Interesting fact: The 'bends' (decompression sickness) in scuba diving occurs when dissolved nitrogen forms bubbles as pressure drops — a drop of just a few kPa too quickly can be fatal.
Converting atmosphere to kilopascal is a common task in engineering, medicine, meteorology, and science. Different industries and countries use different pressure units — PSI in the US, bar in Europe, mmHg in medicine, and pascals in physics — making accurate conversion essential for cross-disciplinary work.
Quick reference: 5 atm = 506.6 kPa and 10 atm = 1013 kPa. For the reverse: 1 kPa = 0.009869 atm. The exact factor is 1 atm = 101.3 kPa.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.