Convert pressure units — pascal, PSI, bar, atmosphere, torr, mmHg and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 atm | 0.000101325 MPa | |
| 0.01 atm | 0.00101325 MPa | |
| 0.1 atm | 0.0101325 MPa | |
| 1 atm | 0.101325 MPa | |
| 5 atm | 0.506625 MPa | |
| 10 atm | 1.01325 MPa | |
| 50 atm | 5.06625 MPa | |
| 100 atm | 10.1325 MPa | |
| 1000 atm | 101.325 MPa |
Formula: Megapascal = Atmosphere × 0.1013
Multiply any atmosphere value by 0.1013 to get megapascal.
Reverse: Atmosphere = Megapascal × 9.869
Common atmosphere values — factor: 1 atm = 0.1013 MPa
| Atmosphere (atm) | Megapascal (MPa) | Context |
|---|---|---|
| 0.001 atm | 0.0001013 MPa | Vacuum |
| 0.01 atm | 0.001013 MPa | High vacuum |
| 0.1 atm | 0.01013 MPa | Mountain top |
| 0.5 atm | 0.05066 MPa | Half atmosphere |
| 1 atm | 0.1013 MPa | Sea level |
| 2 atm | 0.2026 MPa | 10 m water depth |
| 5 atm | 0.5066 MPa | 40 m depth |
| 10 atm | 1.013 MPa | 90 m depth |
| 50 atm | 5.066 MPa | 500 m depth |
| 100 atm | 10.13 MPa | 1 km depth |
| 500 atm | 50.66 MPa | 5 km depth |
| 1,000 atm | 101.3 MPa | 10 km depth |
| 5,000 atm | 506.6 MPa | Deep mantle |
| 1e+04 atm | 1,013 MPa | Very deep mantle |
| 5e+04 atm | 5,066 MPa | Diamond formation |
1 atm = 0.1013 MPa. Memorize for instant estimates.
Use 0.1013 as a quick mental multiplier.
Multiply result by 9.869 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 megapascal (MPa) equals 1,000,000 pascals (1,000 kPa) and is the standard unit for high-pressure engineering applications including hydraulics, structural materials, and industrial processes.
Steel has a tensile strength of about 400–550 MPa; concrete compressive strength is typically 20–40 MPa. Hydraulic systems in heavy machinery operate at 20–35 MPa. Water jet cutting uses pressures up to 600 MPa.
Interesting fact: The deepest point in the ocean (Mariana Trench, ~11,000 m) has a pressure of about 110 MPa — over 1,000 times atmospheric pressure.
Converting atmosphere to megapascal 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 = 0.5066 MPa and 10 atm = 1.013 MPa. For the reverse: 1 MPa = 9.869 atm. The exact factor is 1 atm = 0.1013 MPa.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.