Psi to Millimeter Water Converter
Enter a value in psi and get the equivalent in millimeter water instantly. The calculator uses the standard unit relationship and runs directly in your browser.
Psi → Millimeter Water
Formula
This conversion page is dedicated to the psi-to-millimeter water direction so the unit relationship, reverse path and examples are easy to find. For scale-factor units, XpressCalculator converts through the domain base unit using internationally recognized unit definitions. Temperature scales use their standard offset-and-scale equations rather than a simple multiplier.
Worked example
Starting with 1 psi (psi), the converter returns 703.0695796391 millimeter water (mmH₂O). For any other value, enter the number above and the browser recalculates the result immediately.
Quick conversion table
| Psi | Millimeter Water |
|---|---|
| 1 psi | 703.0695796391 mmH₂O |
| 5 psi | 3515.3478981956 mmH₂O |
| 10 psi | 7030.6957963912 mmH₂O |
| 25 psi | 17576.7394909781 mmH₂O |
| 50 psi | 35153.4789819561 mmH₂O |
| 100 psi | 70306.9579639123 mmH₂O |
Helpful guide
Unit conversions are most reliable when the source value and unit are identified correctly. Do not confuse similarly named US customary and imperial units, and keep significant figures appropriate to the precision of the original measurement. For engineering, scientific, medical or safety-critical work, confirm the measurement standard required by your application.
Use sensible precision and verify critical decisions with an authoritative source or qualified professional.
Frequently asked questions
How do I convert psi to millimeter water?
Multiply the psi value by 703.0695796391 to get millimeter water. This page performs the conversion instantly and shows the relationship clearly.
Is this psi to millimeter water conversion exact?
The mathematical unit factor is applied directly. Displayed results may be rounded for readability, so retain more digits when high precision matters.
Can I reverse the conversion?
Yes. Use the linked millimeter water to psi converter to reverse the direction without re-entering the formula manually.