About this converter
Stress measures internal force per unit area, while strain measures deformation divided by original length. Pascal (Pa) is the SI stress unit, 1 MPa equals 1,000,000 Pa, and 1 psi equals 6,894.76 Pa. Strain is dimensionless: 1 percent strain equals 0.01 strain, or 10,000 microstrain.
This converter supports stress units and strain formats in separate compatible groups. Structural engineers, materials testing labs, mechanical designers, civil engineers, and mechanics use these units when reading tensile tests, concrete reports, steel specifications, and finite-element outputs.
How to Use This Converter
- Enter the stress or strain value.
- Select a source unit from the stress or strain group.
- Select a compatible target unit from the same group.
- Read the converted result and formula line.
- Use Swap to reverse the selected units.
Units Covered
| Unit | Symbol | Common Use |
|---|---|---|
| Pascal | Pa | SI stress calculations and low-pressure engineering references. |
| Kilopascal | kPa | Soil pressure, structural loads, and material worksheets. |
| Megapascal | MPa | Steel, concrete, plastics, and tensile strength reports. |
| Gigapascal | GPa | Elastic modulus values for metals, composites, and ceramics. |
| PSI | psi | US stress ratings, pressure-derived stress, and mechanical specs. |
| KSI | ksi | Steel yield strength and structural design in US customary units. |
| Bar | bar | Pressure-related stress references and hydraulic calculations. |
| Kilogram-force per square centimeter | kg/cm² | Older mechanical, civil, and pressure-stress tables. |
| Millimeter per millimeter | mm/mm | Dimensionless engineering strain in metric test reports. |
| Inch per inch | in/in | Dimensionless strain in imperial test reports. |
| Percent strain | % | Elongation, compression, and material deformation summaries. |
| Microstrain | μɛ | Strain gauge readings and small structural deflections. |
MPa to PSI Conversion Table
| From | To |
|---|---|
| 1 MPa | 145.038 psi |
| 2 MPa | 290.075 psi |
| 5 MPa | 725.189 psi |
| 10 MPa | 1,450.38 psi |
| 20 MPa | 2,900.75 psi |
| 25 MPa | 3,625.94 psi |
| 50 MPa | 7,251.89 psi |
| 100 MPa | 14,503.8 psi |
| 250 MPa | 36,259.4 psi |
| 500 MPa | 72,518.9 psi |
How to Convert MPa to PSI
Megapascals to PSI
For example, 35 MPa x 145.037738 = 5,076.32 psi.
PSI to megapascals
For example, 10,000 psi / 145.037738 = 68.9476 MPa.
When You Need to Convert Stress and Strain
Structural steel reports often use ksi in US projects while analysis software may output MPa. A 50 ksi yield strength equals 344.738 MPa, so engineers can compare the same material property across design codes.
Concrete and materials labs often report compressive or tensile strength in MPa, while older specifications may use psi. A 25 MPa concrete strength is about 3,626 psi, a common bridge between metric and US job-site documents.
Strain gauges often report microstrain, but engineering calculations may use unit strain. A reading of 750 microstrain equals 0.00075 strain, which can be paired with Young's modulus to estimate stress separately.