Millipascals to PSI Converter
Enter the pressure in millipascals below to convert it to psi.
Convert Millipascals to PSI
Enter a value in millipascals (mPa) to convert to psi (psi).
Millipascal to Pounds per Square Inch Conversion Table
Table showing various millipascal measurements converted to psi. Click any preset value or arrow to load it into the converter.
| Millipascals (mPa) | PSI (psi) |
|---|---|
| 1 mPa | 0.000000145 psi |
| 10 mPa | 0.00000145 psi |
| 100 mPa | 0.000014504 psi |
| 1,000 mPa | 0.000145038 psi |
| 10,000 mPa | 0.0014504 psi |
| 100,000 mPa | 0.0145038 psi |
| 1,000,000 mPa | 0.1450377 psi |
| 5,000,000 mPa | 0.7251887 psi |
| 10,000,000 mPa | 1.4503774 psi |
| 25,400,000 mPa | 3.6839585 psi |
How to Convert Millipascals to PSI
To convert millipascals to psi, multiply the pressure by the following conversion ratio: 0.000000145 psi/millipascal.
Since one millipascal is equal to 0.000000145 psi, you can use this simple formula to convert:
The pressure in psi is equal to the pressure in millipascals multiplied by 0.000000145.
For example, here's how to convert 5 millipascals to psi using the formula above.
How Many PSI Are in a Millipascal?
There are 0.000000145 psi in a millipascal, which is why we use this value in the formula above.
Our millipascal to pounds per square inch calculator automatically converts your pressure measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Millipascals and psi are both units used to measure pressure. Keep reading to learn more about each unit.
What Is a Millipascal?
A millipascal is a unit of pressure equal to 1/1,000 of a pascal (0.001 Pa). One-thousandth of a Pascal. [1]
The millipascal is classified as a metric and SI-compatible unit of pressure. Millipascals can be abbreviated as mPa; for example, 1 millipascal can be written as 1 mPa.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the millipascal (mPa) a convenient decimal multiple of the pascal (Pa).
In practice, millipascals (mPa) are widely used across fine-tolerance laboratory, analytical, and micro-scale pressure measurements within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Pounds per Square Inch?
A pounds per square inch is a unit of pressure equal to 6,894.7572932 pascals (Pa), the base unit for pressure. Imperial & US pressure unit equal to 1 pound-force per square inch (6.89476 kPa). [2]
The pounds per square inch is classified as a US customary and imperial unit of pressure. PSI can be abbreviated as psi; for example, 1 pounds per square inch can be written as 1 psi.
When working with psi (psi) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, psi (psi) are widely used across large-scale industrial, bulk, and macro-level pressure specifications within US customary and imperial workflows, engineering documentation, and technical data sheets.
When converting pressure between millipascals (mPa) and psi (psi), keep full floating-point precision (1 mPa = 0.000000145 psi; 1 psi = 6,894,757.293168 mPa) during intermediate calculations and round only the final pounds per square inch figure to match your instrument tolerance.
More Millipascal & Pounds per Square Inch Conversions
Need to calculate in the opposite direction? Use our psi to millipascals calculator to switch your starting unit immediately. You can also explore related tools such as converting psi to millipascals, converting bars to psi, or converting kilopascals to psi.
Convert from Millipascals
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))·Pressure Metrology Standard — Millipascals (mPa) to PSI (psi)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Pascal (Pa))·Unit Specifications: Millipascal (mPa) & Pounds per Square Inch (psi)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Mechanics)·Conversion Factors & Mathematical Basis (mPa to psi)