1 英寸水柱（inH₂O）等於 0.00024908891 MPa，1 兆帕（MPa）等於 4,014.63076 inH₂O。
| 英寸水柱 | 兆帕 |
|---|---|
| 0.01 inH₂O | 0.0000024908891 MPa |
| 0.1 inH₂O | 0.000024908891 MPa |
| 1 inH₂O | 0.00024908891 MPa |
| 2 inH₂O | 0.00049817782 MPa |
| 3 inH₂O | 0.00074726673 MPa |
| 4 inH₂O | 0.00099635564 MPa |
| 5 inH₂O | 0.00124544455 MPa |
| 6 inH₂O | 0.00149453346 MPa |
| 7 inH₂O | 0.00174362237 MPa |
| 8 inH₂O | 0.00199271128 MPa |
| 9 inH₂O | 0.00224180019 MPa |
| 10 inH₂O | 0.0024908891 MPa |
| 20 inH₂O | 0.0049817782 MPa |
| 30 inH₂O | 0.0074726673 MPa |
| 40 inH₂O | 0.0099635564 MPa |
| 50 inH₂O | 0.0124544455 MPa |
| 60 inH₂O | 0.0149453346 MPa |
| 70 inH₂O | 0.0174362237 MPa |
| 80 inH₂O | 0.0199271128 MPa |
| 90 inH₂O | 0.0224180019 MPa |
| 100 inH₂O | 0.024908891 MPa |
| 200 inH₂O | 0.049817782 MPa |
| 300 inH₂O | 0.074726673 MPa |
| 500 inH₂O | 0.124544455 MPa |
| 1,000 inH₂O | 0.24908891 MPa |
| 10,000 inH₂O | 2.4908891 MPa |
| 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 |
| 磅力每平方英寸 | 0.036127292 psi |
| 千磅力每平方英寸 | 0.000036127292 ksi |
| 磅力每平方英尺 | 5.20233005 psf |
| 公斤力每平方公分 | 0.00254 kgf/cm² |
| 大氣壓 | 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 |
| 帕斯卡 | 1,000,000 Pa |
| 百帕 | 10,000 hPa |
| 千帕 | 1,000 kPa |
| 兆帕 | 1 MPa |
| 吉帕 | 0.001 GPa |
| 巴 | 10 bar |
| 毫巴 | 10,000 mbar |
| 磅力每平方英寸 | 145.037738 psi |
| 千磅力每平方英寸 | 0.145037738 ksi |
| 磅力每平方英尺 | 20,885.4342 psf |
| 公斤力每平方公分 | 10.1971621 kgf/cm² |
| 大氣壓 | 9.86923267 atm |
| 托 | 7,500.61683 Torr |
| 毫米汞柱 | 7,500.61576 mmHg |
| 英寸汞柱 | 295.299802 inHg |
| 毫米水柱 | 101,971.621 mmH₂O |
| 英寸水柱 | 4,014.63076 inH₂O |