Earth equatorial radius

R_⊕ = 6.378 137 × 10⁶ m

Unit: m
Value: 6.378 137 × 10⁶
Exact: yes
Note: The reference ellipsoid GPS uses; the poles are 21 km closer to the centre.
Symbol: R_⊕
Category: Astronomical
Numeric: 6378137
Uncertainty: exact (WGS 84)

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From the Constants database in Notion, last edited 2026-08-15. This page is the row, rendered by the build; nothing on it is written by hand.