Gigapascal (GPa)

The gigapascal (GPa) equals 10⁹ pascals or 1000 MPa. Young's modulus and the stiffness of materials are quoted in GPa: steel about 200–210 GPa, aluminium about 70 GPa.

Symbol: GPa

Quantity: pressure, stress and differential pressure (force per unit area)

SI relation: 1 GPa = 1000000000 Pa (exact)

Derivation: 1 GPa = 10⁹ Pa = 1000 MPa = 1 kN/mm²

Exact: yes, by definition

Typical uses

Young's modulus and shear modulus of metals, ceramics and composites
Ultimate strength of high-strength fibres and steels
Hardness and high-pressure physics

Convert gigapascals to other units

1 GPa in other pressure units
Conversion	1 GPa equals	Reverse
gigapascal to pascal	1000000000 Pa	pascal to gigapascal
gigapascal to kilopascal	1000000 kPa	kilopascal to gigapascal
gigapascal to ksi	145.0377377 ksi	ksi to gigapascal
gigapascal to kilogram-force per square centimetre	10197.16213 kgf/cm²	kilogram-force per square centimetre to gigapascal
gigapascal to psi	145037.7377 psi	psi to gigapascal
gigapascal to bar	10000 bar	bar to gigapascal
gigapascal to millimeter of mercury	7500615.758 mmHg	millimeter of mercury to gigapascal
gigapascal to inch of water	4014630.76 inH₂O	inch of water to gigapascal
gigapascal to atmosphere	9869.232667 atm	atmosphere to gigapascal
gigapascal to megapascal	1000 MPa	megapascal to gigapascal
gigapascal to newton per square millimetre	1000 N/mm²	newton per square millimetre to gigapascal
gigapascal to kilogram-force per square millimetre	101.9716213 kgf/mm²	kilogram-force per square millimetre to gigapascal
gigapascal to millibar	10000000 mbar	millibar to gigapascal
gigapascal to torr	7500616.827 Torr	torr to gigapascal
gigapascal to millimeter of water	101971621.3 mmH₂O	millimeter of water to gigapascal
gigapascal to centimeter of water	10197162.13 cmH₂O	centimeter of water to gigapascal
gigapascal to inch of mercury	295299.833 inHg	inch of mercury to gigapascal
gigapascal to decibar	100000 dbar	decibar to gigapascal
gigapascal to inch of water (60 °F)	4018646.52 inH₂O (60 °F)	inch of water (60 °F) to gigapascal
gigapascal to barye	10000000000 Ba	barye to gigapascal

Open the Pressure Converter to convert any value between all units.

Sources

The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.

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APA

Scientific Converters. (2026, October 15). Gigapascal (GPa). Retrieved October 25, 2026, from https://scientificconverters.com/units/gigapascal/

IEEE

Scientific Converters, "Gigapascal (GPa)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/gigapascal/