MPa to PSI Converter — Engineering Pressure & Stress Calculator
Free conversion for hydraulics, FEA, piping, structural & mechanical engineering. Verified against NIST / ISO standards. Last updated: May 2026.
0.1
1
10
21
35
100
145.0377
PSI (pounds per square inch)
≈ 10 bar | Common industrial hydraulic range
🛠️ How to Convert MPa to PSI
The conversion is PSI = MPa × 145.03773773. For example, 21 MPa = 3,045.7935 PSI – a standard industrial hydraulic pressure. Simply enter any value above to see the result.
- 1 MPa = 145.0377 PSI
- 10 MPa = 1,450.3774 PSI
- 250 MPa = 36,259.4344 PSI (approx. mild steel yield strength)
📐 MPa to PSI Formula
PSI = MPa × 145.0377
Reverse: MPa = PSI ÷ 145.0377
📊 Engineering Pressure Conversion Chart
| MPa | PSI | bar | N/mm² |
|---|
🔧 Hydraulic Pressure Conversions (common in industry)
- Low‑pressure systems: 2 – 5 MPa (290 – 725 PSI)
- Medium‑pressure (industrial): 7 – 21 MPa (1,000 – 3,000 PSI)
- High‑pressure (heavy machinery): 21 – 35 MPa (3,000 – 5,000 PSI)
- Water jet cutting: up to 100 MPa (14,500 PSI)
📏 Stress Unit Conversion for FEA
In finite element analysis, results are typically in megapascals (MPa). Here's how common steel strengths translate:
- Mild steel (yield): ~250 MPa ≈ 36,260 PSI ≈ 36.3 ksi
- High‑strength alloy: ~500 MPa ≈ 72,500 PSI ≈ 72.5 ksi
- Tool steel: ~700 MPa ≈ 101,500 PSI ≈ 101.5 ksi
🧠 MPa vs PSI – What’s the difference?
MPa (megapascal) is the SI unit for pressure and stress, equal to 1,000,000 pascals. It is standard worldwide for FEA, ASME codes, and European engineering. PSI (pounds per square inch) is the imperial unit still dominant in North American industry. 1 MPa = 145.0377 PSI.
📋 Related Engineering Standards
ISO 80000-4
ASME B31.3
ANSI B16.5
ASTM E4
DIN EN 837
❓ Frequently Asked Questions
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Verified against NIST pressure conversion standards | Double‑precision floating point | Updated May 2026