How many times larger is Earth than the Moon?
| Reference | Dimension |
|---|---|
| Earth | 12,742 km Mean diameter ≈ 12 740 km |
| Moon | 3,474.8 km Mean diameter ≈ 3 475 km |
Calculation: 12,742 km ÷ 3,474.8 km, after conversion into the same unit. The ratio calculated from the catalogue data is about 3.667.
Both illustrations use a common factor for the stated dimension. Positions aid reading and do not represent physical separation.
To understand their separation, use the Earth–Moon journey in Distance mode: both diameters remain to scale there.
Check the conventions
Earth
Mean diameter calculated from the volume-equivalent radius in the NASA/JPL table. Rings and the outer atmosphere are excluded.
Approximate catalogue reference; a source is provided, but the measurement has not been individually audited.
Moon
Size calculated from the mean radius published by NASA/JPL: the diameter of a sphere with equivalent volume. The actual shape of small moons can be highly irregular.
Approximate catalogue reference; a source is provided, but the measurement has not been individually audited.
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