1 标准大气压（atm）等于 406.782462 inH₂O，1 英寸水柱（inH₂O）等于 0.00245831641 atm。
| 标准大气压 | 英寸水柱 |
|---|---|
| 0.01 atm | 4.06782462 inH₂O |
| 0.1 atm | 40.6782462 inH₂O |
| 1 atm | 406.782462 inH₂O |
| 2 atm | 813.564923 inH₂O |
| 3 atm | 1,220.34739 inH₂O |
| 4 atm | 1,627.12985 inH₂O |
| 5 atm | 2,033.91231 inH₂O |
| 6 atm | 2,440.69477 inH₂O |
| 7 atm | 2,847.47723 inH₂O |
| 8 atm | 3,254.25969 inH₂O |
| 9 atm | 3,661.04216 inH₂O |
| 10 atm | 4,067.82462 inH₂O |
| 20 atm | 8,135.64923 inH₂O |
| 30 atm | 12,203.4739 inH₂O |
| 40 atm | 16,271.2985 inH₂O |
| 50 atm | 20,339.1231 inH₂O |
| 60 atm | 24,406.9477 inH₂O |
| 70 atm | 28,474.7723 inH₂O |
| 80 atm | 32,542.5969 inH₂O |
| 90 atm | 36,610.4216 inH₂O |
| 100 atm | 40,678.2462 inH₂O |
| 200 atm | 81,356.4923 inH₂O |
| 300 atm | 122,034.739 inH₂O |
| 500 atm | 203,391.231 inH₂O |
| 1,000 atm | 406,782.462 inH₂O |
| 10,000 atm | 4,067,824.62 inH₂O |
| 帕斯卡 | 101,325 Pa |
| 百帕 | 1,013.25 hPa |
| 千帕 | 101.325 kPa |
| 兆帕 | 0.101325 MPa |
| 吉帕 | 0.000101325 GPa |
| 巴 | 1.01325 bar |
| 毫巴 | 1,013.25 mbar |
| 磅/平方英寸 | 14.6959488 psi |
| 千磅/平方英寸 | 0.0146959488 ksi |
| 磅/平方英尺 | 2,116.21662 psf |
| 千克力/平方厘米 | 1.03322745 kgf/cm² |
| 标准大气压 | 1 atm |
| 托 | 760 Torr |
| 毫米汞柱 | 759.999892 mmHg |
| 英寸汞柱 | 29.9212524 inHg |
| 毫米水柱 | 10,332.2745 mmH₂O |
| 英寸水柱 | 406.782462 inH₂O |
| 帕斯卡 | 249.08891 Pa |
| 百帕 | 2.4908891 hPa |
| 千帕 | 0.24908891 kPa |
| 兆帕 | 0.00024908891 MPa |
| 吉帕 | 0.00000024908891 GPa |
| 巴 | 0.0024908891 bar |
| 毫巴 | 2.4908891 mbar |
| 磅/平方英寸 | 0.036127292 psi |
| 千磅/平方英寸 | 0.000036127292 ksi |
| 磅/平方英尺 | 5.20233005 psf |
| 千克力/平方厘米 | 0.00254 kgf/cm² |
| 标准大气压 | 0.00245831641 atm |
| 托 | 1.86832047 Torr |
| 毫米汞柱 | 1.8683202 mmHg |
| 英寸汞柱 | 0.0735559057 inHg |
| 毫米水柱 | 25.4 mmH₂O |
| 英寸水柱 | 1 inH₂O |