Convert Millipascals to Hectopascals
Convert Millipascals (mPa) to Hectopascals (hPa) instantly and accurately.
Conversion Formula
hPa = mPa × 1.000000000e-5
About Millipascals
A millipascal (mPa) is 10⁻³ Pa. It appears primarily in rheology as the millipascal-second (mPa·s = centipoise) for dynamic viscosity: water at 20°C is 1.002 mPa·s; olive oil ~80 mPa·s; honey 2,000-10,000 mPa·s. Food technology, polymer processing, pharmaceutical formulation, and inkjet printing all specify flow behaviour in mPa·s. Partial pressures of trace atmospheric gases and ultra-high-vacuum leak rates measured by residual gas analysers are also expressed in millipascals. 1 mPa = 10⁻³ Pa.
About Hectopascals
A hectopascal (hPa) = 100 Pa = 1 mbar - the WMO-official SI-compatible meteorological pressure unit since 1986, replacing millibar with no numerical change. All modern surface observations (METAR, SYNOP), digital barometers, aviation weather, and weather apps report in hPa. QNH altimeter settings outside North America are in hPa. ICAO standard sea-level pressure is 1013.25 hPa. Continental high-pressure record exceeds 1084 hPa; Typhoon Tip (1979) holds the low record at ~870 hPa. 1 hPa = 100 Pa.
Quick Reference Table
| Millipascals (mPa) | Hectopascals (hPa) |
|---|---|
| 1 mPa | 1 × 10-5 hPa |
| 2 mPa | 2 × 10-5 hPa |
| 5 mPa | 5 × 10-5 hPa |
| 10 mPa | 0.0001 hPa |
| 25 mPa | 0.00025 hPa |
| 50 mPa | 0.0005 hPa |
| 100 mPa | 0.001 hPa |