Water Pressure Calculators
PSI to Water Column Calculator
Convert Pounds per Square Inch (PSI) to Millimetres of Water Column (mmH₂O) instantly with the exact pressure conversion factor.
Enter calculator values
Millimetres of Water Column result
0mmH₂O
Live result diagram
mmH₂O = PSI × 703.0695796
1 PSI = 703.0695796 mmH₂O
0%Live value100%
PSI to mmH₂O conversion table
| PSI | mmH₂O |
|---|---|
| 0.1 | 70.306958 |
| 0.5 | 351.53479 |
| 1 | 703.06958 |
| 2 | 1406.1392 |
| 5 | 3515.3479 |
| 10 | 7030.6958 |
| 25 | 17576.739 |
| 50 | 35153.479 |
| 100 | 70306.958 |
Frequently asked questions about PSI to Water Column Calculator
How do I use the PSI to Water Column Calculator?
Enter a value in PSI. The calculator multiplies it by 703.0695796 to return mmH₂O.
What is the PSI to mmH₂O formula?
mmH₂O = PSI × 703.0695796.
Can the PSI to Water Column Calculator handle decimals?
Yes. It accepts whole numbers and decimal pressure values and updates the result instantly.
Is this PSI to Water Column Calculator accurate?
Yes. The calculation uses pressure-unit definitions expressed through the pascal and retains practical numerical precision.