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Stress Unit Converter: MPa (N/mm²), psi, ksi, kgf/cm²
Type a value in any box and the others update. For comparing a pull-off, bond or bolt stress result with a spec written in the other unit system.
Stress
1 MPa = 1 N/mm². Nothing you type is uploaded or saved.
MPa to psi table
| MPa | psi | ksi |
|---|
| 0.5 MPa | 73 psi | 0.07 ksi |
| 1 MPa | 145 psi | 0.15 ksi |
| 1.5 MPa | 218 psi | 0.22 ksi |
| 2 MPa | 290 psi | 0.29 ksi |
| 2.5 MPa | 363 psi | 0.36 ksi |
| 3 MPa | 435 psi | 0.44 ksi |
| 5 MPa | 725 psi | 0.73 ksi |
| 10 MPa | 1,450 psi | 1.45 ksi |
| 15 MPa | 2,176 psi | 2.18 ksi |
| 20 MPa | 2,901 psi | 2.90 ksi |
| 25 MPa | 3,626 psi | 3.63 ksi |
| 30 MPa | 4,351 psi | 4.35 ksi |
| 40 MPa | 5,802 psi | 5.80 ksi |
| 50 MPa | 7,252 psi | 7.25 ksi |
| 100 MPa | 14,504 psi | 14.50 ksi |
| 200 MPa | 29,008 psi | 29.01 ksi |
| 400 MPa | 58,015 psi | 58.02 ksi |
| 600 MPa | 87,023 psi | 87.02 ksi |
| 800 MPa | 116,030 psi | 116.03 ksi |
| 1,000 MPa | 145,038 psi | 145.04 ksi |
psi to MPa table
| psi | MPa |
|---|
| 50 psi | 0.345 MPa |
| 100 psi | 0.689 MPa |
| 150 psi | 1.034 MPa |
| 200 psi | 1.379 MPa |
| 250 psi | 1.724 MPa |
| 300 psi | 2.068 MPa |
| 400 psi | 2.758 MPa |
| 500 psi | 3.447 MPa |
| 1,000 psi | 6.895 MPa |
| 2,000 psi | 13.790 MPa |
| 3,000 psi | 20.684 MPa |
| 4,000 psi | 27.579 MPa |
| 5,000 psi | 34.474 MPa |
The conversion factors
All factors come from exact definitions, so the only rounding is in the display: 1 MPa = 1 N/mm² = 145.0377 psi, 1 psi = 0.006894757 MPa (1 lbf = 4.4482216152605 N, 1 in = 25.4 mm), 1 ksi = 1,000 psi, 1 kgf/cm² = 0.0980665 MPa. The MPa table is rounded to whole psi and 0.01 ksi, the psi table to 0.001 MPa; the converter shows up to four decimals.
This page converts units only; acceptance values come from your spec. To get a stress from a test load: the pull-off strength calculator (load and dolly diameter), the adhesive anchor bond stress calculator and the bolt tensile stress area calculator. For gauge pressure use the pressure converter, for loads the force unit converter.
Record the results in the full report workbook
The Fastener & Anchor Pull-Test Report Templates pack has a 40-row proof-test report with automatic PASS/FAIL, ultimate-load statistics, a calibration log, a unit converter, a printable procedure checklist and a standards index. $49 one-time, from Quality Tester Solutions LLC, the company behind Force-Test pull testers.