Standard Gravity

The conventional value of Earth's surface gravitational acceleration, fixed by definition in 1901.

Specifications & Metrics

symbol

g₀

status

Exact — conventional value (CGPM, 1901)

value

9.80665 m·s⁻²

Relative Scale in Constants

Core Principles & Analysis

• Fixed at 9.80665 m/s² by the CGPM in 1901 to standardize weights and measures.
• Real sea-level gravity varies from about 9.78 m/s² at the equator to 9.83 m/s² at the poles.
• Defines the kilogram-force and calibrates weight against mass in engineering practice.

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