Convert Megapascals to Inches of Water
1 megapascal (MPa) equals 4014.63076 inches of water (inH₂O).
1 MPa = 4014.63076 inH₂O
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk megapascal to inch of water converter to paste a column from Excel.
How to Convert Megapascal to Inch of Water
- 1 MPa = 4014.63076 inH₂O
- 1 inH₂O = 0.00024908891 MPa
- Example: convert 15 MPa to inH₂O: 15 MPa = 15 × 4014.63076 inH₂O = 60219.4614 inH₂O
Reference conditions. inH₂O: Conventional water column: ρ = 1000 kg/m³ and gₙ = 9.80665 m/s² (≈ water at 4 °C).
Formula
inH₂O = MPa × 4014.630759756
Derivation from SI units:
- 1 MPa = 10⁶ Pa = 1 N/mm²
- 1 inH₂O = 1000 kg/m³ × 9.80665 m/s² × 0.0254 m = 249.08891 Pa
- 1 MPa = 1000000 Pa ÷ 249.08891 Pa per inH₂O = 4014.630759756 inH₂O
Both units are defined exactly, so the factor is exact. Megapascal definition: megapascal; Inch of Water definition: inch of water.
Worked examples
- A reading of 2 MPa converts to 8029.26152 inH₂O.
2 MPa × 4014.63076 = 8029.26152 inH₂O - A value of 30 MPa is 120438.9228 inH₂O.
30 MPa × 4014.63076 = 120438.9228 inH₂O
Megapascal to Inch of Water conversion table
| Megapascals (MPa) | Inches of Water (inH₂O) |
|---|---|
| 0.01 MPa | 40.1463076 inH₂O |
| 0.05 MPa | 200.731538 inH₂O |
| 0.1 MPa | 401.463076 inH₂O |
| 0.2 MPa | 802.926152 inH₂O |
| 0.5 MPa | 2007.31538 inH₂O |
| 0.7 MPa | 2810.241532 inH₂O |
| 1 MPa | 4014.63076 inH₂O |
| 1.5 MPa | 6021.94614 inH₂O |
| 2 MPa | 8029.26152 inH₂O |
| 2.5 MPa | 10036.5769 inH₂O |
| 5 MPa | 20073.1538 inH₂O |
| 7 MPa | 28102.41532 inH₂O |
| 10 MPa | 40146.3076 inH₂O |
| 15 MPa | 60219.4614 inH₂O |
| 20 MPa | 80292.6152 inH₂O |
| 25 MPa | 100365.769 inH₂O |
| 30 MPa | 120438.9228 inH₂O |
| 40 MPa | 160585.2304 inH₂O |
| 50 MPa | 200731.538 inH₂O |
| 70 MPa | 281024.1532 inH₂O |
| 100 MPa | 401463.076 inH₂O |
| 200 MPa | 802926.152 inH₂O |
| 250 MPa | 1003657.69 inH₂O |
| 355 MPa | 1425193.92 inH₂O |
| 500 MPa | 2007315.38 inH₂O |
Where it's used
Megapascals are used for concrete compressive strength (typically 20–50 MPa), while inches of water appear in HVAC total external static pressure (residential ≈ 0.5 inH₂O). Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.
Megapascal to other pressure units
| Conversion | 1 MPa equals |
|---|---|
| megapascal to pascal | 1000000 Pa |
| megapascal to kilopascal | 1000 kPa |
| megapascal to psi | 145.0377377 psi |
| megapascal to bar | 10 bar |
| megapascal to millibar | 10000 mbar |
| megapascal to decibar | 100 dbar |
| megapascal to torr | 7500.616827 Torr |
| megapascal to millimeter of mercury | 7500.615758 mmHg |
| megapascal to millimeter of water | 101971.6213 mmH₂O |
| megapascal to centimeter of water | 10197.16213 cmH₂O |
| megapascal to inch of water | 4014.63076 inH₂O |
| megapascal to inch of water (60 °F) | 4018.64652 inH₂O (60 °F) |
| megapascal to inch of mercury | 295.299833 inHg |
| megapascal to atmosphere | 9.869232667 atm |
| megapascal to barye | 10000000 Ba |
Frequently asked questions
How many inches of water are in 1 megapascal?
1 MPa = 4014.63076 inH₂O.
How do I convert megapascals to inches of water?
Multiply the value in MPa by 4014.63076. For example, 15 MPa × 4014.63076 = 60219.4614 inH₂O.
Is the MPa to inH₂O conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "inch of water, conventional (inH2O)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Megapascals to Inches of Water. Retrieved October 17, 2026, from https://scientificconverters.com/pressure/megapascal-to-inch-of-water/
IEEE
Scientific Converters, "Convert Megapascals to Inches of Water," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/pressure/megapascal-to-inch-of-water/