Megapascals (MPa) to PSI Converter
Enter a value to instantly convert between pressure units.
1 Megapascal = 145.0377 Pound per Sq. Inch
Key Formulas
Pound per Sq. Inch → Bar
bar = psi × 0.0689476Bar → Pound per Sq. Inch
psi = bar × 14.5038Atmosphere → Pound per Sq. Inch
psi = atm × 14.6959Pound per Sq. Inch → Atmosphere
atm = psi × 0.068046Formula
psi = MPa × 145.038One megapascal equals 145.038 psi, derived from 1 psi = 6894.76 Pa and 1 MPa = 1,000,000 Pa (ratio: 1,000,000 ÷ 6894.76). This conversion is critical in international engineering where metric specifications (MPa for material strength, hydraulic pressure) must be reconciled with North American standards (psi). High-strength steel bolts often specify 800-1000 MPa yield strength, equivalent to 116,000-145,000 psi in US terminology.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A materials engineer confirms 1 MPa = 145 psi for strength specification comparison with US suppliers.
1 MPa = 145.038 psi
Steel structural beam with 250 MPa yield strength = 36,260 psi, used in US bridge design standards.
250 MPa = 36259.5 psi
Hydraulic system pressure of 10 MPa (1450 psi) for pump and cylinder rating across metric and US markets.
10 MPa = 1450.38 psi
Low-pressure application like pneumatic control at 0.1 MPa = 14.5 psi for calibration reference.
0.1 MPa = 14.5038 psi