Inches of water to Pascals
Type a value in Inches of water and get the result in Pascals, calculated exactly.
1 Inches of water = 249.08891 Pascals
Precision
Conventional factorThis result is exact.
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Formula
Pa = inH₂O × 249.08891
To convert Inches of water to Pascals, multiply the value by 249.08891.
Worked examples
- 1 inH₂O × 249.08891 = 249.08891 Pa
- 100 inH₂O × 249.08891 = 24,908.891 Pa
- 50 inH₂O × 249.08891 = 12,454.4455 Pa
This factor rests on a conventional or rounded value.
Conversion table
| Inches of water (inH₂O) | Pascals (Pa) |
|---|---|
| 1 | 249.08891 |
| 2 | 498.17782 |
| 3 | 747.26673 |
| 4 | 996.35564 |
| 5 | 1,245.44455 |
| 6 | 1,494.53346 |
| 7 | 1,743.62237 |
| 8 | 1,992.71128 |
| 9 | 2,241.80019 |
| 10 | 2,490.8891 |
| 15 | 3,736.33365 |
| 20 | 4,981.7782 |
| 25 | 6,227.22275 |
| 30 | 7,472.6673 |
| 40 | 9,963.5564 |
| 50 | 12,454.4455 |
| 60 | 14,945.3346 |
| 70 | 17,436.2237 |
| 75 | 18,681.66825 |
| 80 | 19,927.1128 |
| 90 | 22,418.0019 |
| 100 | 24,908.891 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Pascals to Inches of water
| Pascals (Pa) | Inches of water (inH₂O) |
|---|---|
| 1 | ≈ 0.004014631 |
| 2 | ≈ 0.008029262 |
| 3 | ≈ 0.01204389 |
| 4 | ≈ 0.01605852 |
| 5 | ≈ 0.02007315 |
| 6 | ≈ 0.02408778 |
| 7 | ≈ 0.02810242 |
| 8 | ≈ 0.03211705 |
| 9 | ≈ 0.03613168 |
| 10 | ≈ 0.04014631 |
| 15 | ≈ 0.06021946 |
| 20 | ≈ 0.08029262 |
| 25 | ≈ 0.1003658 |
| 30 | ≈ 0.1204389 |
| 40 | ≈ 0.1605852 |
| 50 | ≈ 0.2007315 |
| 60 | ≈ 0.2408778 |
| 70 | ≈ 0.2810242 |
| 75 | ≈ 0.3010973 |
| 80 | ≈ 0.3211705 |
| 90 | ≈ 0.3613168 |
| 100 | ≈ 0.4014631 |
Unit definitions
- Inches of water inH₂O
- Conventional value of 249.08891 pascals, used for gas and air-flow gauges.
- Pascals Pa
- The SI unit of pressure: one newton per square metre.
Questions people ask
Inches of water to Pascals: what is the conversion factor?
One inH₂O is 249.08891 Pa.
How do I convert Inches of water to Pascals?
Use the formula above. For example, 100 inH₂O = 24,908.891 Pa.
Is the conversion exact?
Very nearly. One of the units is based on a conventional or rounded value, so treat the result as a close approximation.
Factors checked 19 October 2026.