Convert Millipascals to Pounds per Square Inch
Convert Millipascals (mPa) to Pounds per Square Inch (psi) instantly and accurately.
Conversion Formula
psi = mPa × 1.450377377e-7
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 Pounds per Square Inch
One pound per square inch (psi) ≈ 6,894.76 Pa - the dominant pressure unit in US industry and consumer products. Car tyres: 32-36 psi; truck tyres 80-120 psi; bicycle road tyres 80-130 psi. Home water supply: 40-80 psi; residential maximum 80 psi per plumbing code. Compressed air tools: 90-150 psi. Steam autoclave sterilisation: 15-30 psi. The distinction between gauge (psig) and absolute (psia) pressure is critical: gauge pressure is relative to ambient; absolute = gauge + ~14.696 psi. 1 psi = 6,894.76 Pa.
Quick Reference Table
| Millipascals (mPa) | Pounds per Square Inch (psi) |
|---|---|
| 1 mPa | 1.45 × 10-7 psi |
| 2 mPa | 2.901 × 10-7 psi |
| 5 mPa | 7.252 × 10-7 psi |
| 10 mPa | 1.45 × 10-6 psi |
| 25 mPa | 3.626 × 10-6 psi |
| 50 mPa | 7.252 × 10-6 psi |
| 100 mPa | 1.45 × 10-5 psi |