mm of water to megapascals
Convert mm of water to megapascal — instant, free, with the formula shown.
How to convert mm of water to megapascal
To convert mm of water to megapascal, multiply by 9.8066e-6:
For example, 10 mmH₂O × 9.8066e-6 = 9.8066e-5 MPa.
mmH₂O to MPa conversion table
| mm of water (mmH₂O) | megapascals (MPa) |
|---|---|
| 1 mmH₂O | 9.8066e-6 MPa |
| 2 mmH₂O | 1.9613e-5 MPa |
| 5 mmH₂O | 4.9033e-5 MPa |
| 10 mmH₂O | 9.8066e-5 MPa |
| 25 mmH₂O | 0.000245 MPa |
| 50 mmH₂O | 0.00049 MPa |
| 100 mmH₂O | 0.000981 MPa |
| 250 mmH₂O | 0.002452 MPa |
| 500 mmH₂O | 0.004903 MPa |
| 1000 mmH₂O | 0.009807 MPa |
Other mm of water conversions
Convert to megapascal from another unit
mmH₂O to MPa — frequently asked
How many megapascals are in 1 mm of water?
1 mm of water = 9.8066e-6 megapascals (mmH₂O × 9.8066e-6 = MPa).
What is the formula to convert mm of water to megapascal?
Multiply your mm of water value by 9.8066e-6 to get megapascal.
How do I convert 10 mm of water to megapascals?
10 mmH₂O = 9.8066e-5 MPa. For 100 mmH₂O the answer is 0.000981 MPa. Use the calculator on this page for any other value.
When to convert mm of water to megapascal
Pressure conversion — common questions
What's the difference between bar and psi?
1 bar = 100,000 Pa ≈ 14.504 psi. Bar is metric/SI-friendly; psi is US imperial. Tire pressure in cars is commonly 30–35 psi or ≈ 2.1–2.4 bar.
Is 1 atmosphere the same as 1 bar?
Very close but not identical. 1 atm = 1.01325 bar = 101,325 Pa. 1 bar = 100,000 Pa.
Why is blood pressure in mmHg?
Historically measured with mercury manometers — the pressure that supports a column of mercury that many millimetres tall. 120 mmHg systolic ≈ 16 kPa.