mm of water to pascals
Convert mm of water to pascal — instant, free, with the formula shown.
How to convert mm of water to pascal
To convert mm of water to pascal, multiply by 9.80665:
For example, 10 mmH₂O × 9.80665 = 98.0665 Pa.
mmH₂O to Pa conversion table
| mm of water (mmH₂O) | pascals (Pa) |
|---|---|
| 1 mmH₂O | 9.80665 Pa |
| 2 mmH₂O | 19.6133 Pa |
| 5 mmH₂O | 49.03325 Pa |
| 10 mmH₂O | 98.0665 Pa |
| 25 mmH₂O | 245.16625 Pa |
| 50 mmH₂O | 490.3325 Pa |
| 100 mmH₂O | 980.665 Pa |
| 250 mmH₂O | 2451.6625 Pa |
| 500 mmH₂O | 4903.325 Pa |
| 1000 mmH₂O | 9806.65 Pa |
Other mm of water conversions
Convert to pascal from another unit
mmH₂O to Pa — frequently asked
How many pascals are in 1 mm of water?
1 mm of water = 9.80665 pascals (mmH₂O × 9.80665 = Pa).
What is the formula to convert mm of water to pascal?
Multiply your mm of water value by 9.80665 to get pascal.
How do I convert 10 mm of water to pascals?
10 mmH₂O = 98.0665 Pa. For 100 mmH₂O the answer is 980.665 Pa. Use the calculator on this page for any other value.
When to convert mm of water to pascal
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.