# Atmosphere Conversion Calculator

Enter a value in atmospheres below to convert to another unit of pressure.

## What Is an Atmosphere?

An atmosphere is a unit used to measure pressure.

Atmospheres can be abbreviated as atm; for example, 1 atmosphere can be written as 1 atm.

## How Much Is an Atmosphere?

The atmosphere is a reference measure of pressure equal to 101,325 pascals or 1,013,250 dynes. The atmosphere was originally defined as the pressure of 760 millimeters of mercury at standard gravity at 0 °C, but was later redefined in 1954 to be equal to 1,013,250 dynes.

## How to Convert Atmospheres

To convert atmospheres to another unit of pressure, you need to multiply the value by a conversion factor. A conversion factor is a numerical value used to change the units of a measurement without changing the value.[1]

You can find the conversion factors for atmospheres in the conversion table below.

Then, multiply the pressure measurement by the conversion factor to find the equivalent value in the desired unit of measurement.

atmospheres × conversion factor = result

You can also use a calculator, such as one of the converters below, for the conversion.

## Atmosphere Conversion Table

Common atmosphere values and equivalent imperial and metric pressure measurements
atmospheres pascals hectopascals bars millibars kilograms per square centimeter kilograms per square meter pounds per square inch pounds per square foot torr
1 atm 101,325 Pa 1,013 hPa 1.01325 bar 1,013 mbar 1.033227 kgf/cm² 10,332 kgf/m² 14.695964 psi 2,116 psf 760 Torr
2 atm 202,650 Pa 2,027 hPa 2.0265 bar 2,027 mbar 2.066455 kgf/cm² 20,665 kgf/m² 29.391929 psi 4,232 psf 1,520 Torr
3 atm 303,975 Pa 3,040 hPa 3.03975 bar 3,040 mbar 3.099682 kgf/cm² 30,997 kgf/m² 44.087893 psi 6,349 psf 2,280 Torr
4 atm 405,300 Pa 4,053 hPa 4.053 bar 4,053 mbar 4.13291 kgf/cm² 41,329 kgf/m² 58.783857 psi 8,465 psf 3,040 Torr
5 atm 506,625 Pa 5,066 hPa 5.06625 bar 5,066 mbar 5.166137 kgf/cm² 51,661 kgf/m² 73.479822 psi 10,581 psf 3,800 Torr
6 atm 607,950 Pa 6,080 hPa 6.0795 bar 6,080 mbar 6.199365 kgf/cm² 61,994 kgf/m² 88.175786 psi 12,697 psf 4,560 Torr
7 atm 709,275 Pa 7,093 hPa 7.09275 bar 7,093 mbar 7.232592 kgf/cm² 72,326 kgf/m² 102.87175 psi 14,814 psf 5,320 Torr
8 atm 810,600 Pa 8,106 hPa 8.106 bar 8,106 mbar 8.26582 kgf/cm² 82,658 kgf/m² 117.567715 psi 16,930 psf 6,080 Torr
9 atm 911,925 Pa 9,119 hPa 9.11925 bar 9,119 mbar 9.299047 kgf/cm² 92,990 kgf/m² 132.263679 psi 19,046 psf 6,840 Torr
10 atm 1,013,250 Pa 10,133 hPa 10.1325 bar 10,133 mbar 10.332275 kgf/cm² 103,323 kgf/m² 146.959643 psi 21,162 psf 7,600 Torr
11 atm 1,114,575 Pa 11,146 hPa 11.14575 bar 11,146 mbar 11.365502 kgf/cm² 113,655 kgf/m² 161.655608 psi 23,278 psf 8,360 Torr
12 atm 1,215,900 Pa 12,159 hPa 12.159 bar 12,159 mbar 12.398729 kgf/cm² 123,987 kgf/m² 176.351572 psi 25,395 psf 9,120 Torr
13 atm 1,317,225 Pa 13,172 hPa 13.17225 bar 13,172 mbar 13.431957 kgf/cm² 134,320 kgf/m² 191.047536 psi 27,511 psf 9,880 Torr
14 atm 1,418,550 Pa 14,186 hPa 14.1855 bar 14,186 mbar 14.465184 kgf/cm² 144,652 kgf/m² 205.7435 psi 29,627 psf 10,640 Torr
15 atm 1,519,875 Pa 15,199 hPa 15.19875 bar 15,199 mbar 15.498412 kgf/cm² 154,984 kgf/m² 220.439465 psi 31,743 psf 11,400 Torr
16 atm 1,621,200 Pa 16,212 hPa 16.212 bar 16,212 mbar 16.531639 kgf/cm² 165,316 kgf/m² 235.135429 psi 33,860 psf 12,160 Torr
17 atm 1,722,525 Pa 17,225 hPa 17.22525 bar 17,225 mbar 17.564867 kgf/cm² 175,649 kgf/m² 249.831393 psi 35,976 psf 12,920 Torr
18 atm 1,823,850 Pa 18,239 hPa 18.2385 bar 18,239 mbar 18.598094 kgf/cm² 185,981 kgf/m² 264.527358 psi 38,092 psf 13,680 Torr
19 atm 1,925,175 Pa 19,252 hPa 19.25175 bar 19,252 mbar 19.631322 kgf/cm² 196,313 kgf/m² 279.223322 psi 40,208 psf 14,440 Torr
20 atm 2,026,500 Pa 20,265 hPa 20.265 bar 20,265 mbar 20.664549 kgf/cm² 206,645 kgf/m² 293.919286 psi 42,324 psf 15,200 Torr

## Atmosphere Conversion Calculators

You can also convert pressure using one of our atmosphere converters below.

## References

1. National Institute of Standards & Technology, Unit Conversion, https://www.nist.gov/pml/owm/metric-si/unit-conversion