Earth mean radius
Value: 6,371 km
Common geodesy reference.
Category
Geography and Earth
Background, relevance, and practical use
Earth mean radius is typically listed as 6,371 km. Common geodesy reference. This is most useful as a reference point rather than a one-size-fits-all answer: it helps you quickly sanity-check numbers and avoid unit or magnitude mistakes.
In practice, this constant is used for Earth-scale comparisons and geoscience context. A good workflow is to start with this baseline, then adjust for context (measurement method, precision needs, and real-world conditions). That gives you speed without sacrificing accuracy.
If you need high precision, verify the source standard and units before final calculations. For most day-to-day use, this value is reliable for estimation, explanation, and quick comparisons.
FAQ
What is Earth mean radius?
Earth mean radius is typically listed as 6,371 km.
Where is this constant used?
Common geodesy reference.