Earth–Moon distance
The Earth–Moon distance is the average space between the centres of the Earth and the Moon.
Also known as: earth moon distance, distance to the moon, lunar distance
How big is it?
384,400 km · distance
Distance · average
A little perspective
Earth–Moon distance vs Proxima Centauri: length comparison
The Earth–Moon distance is about 1.79 times the diameter of Proxima Centauri.
The Earth–Moon distance is the average space between the centres of the Earth and the Moon.
Proxima Centauri is a red dwarf star and the closest known star to the Sun.
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions. A ruler represents the selected distance or a measurement not visible in this view.
Measurements, assumptions & sources +
Earth–Moon distance
Distance: 384,400 km; average.
Average centre-to-centre distance. The Moon’s orbit is not a circle.
NASA — Earth and Moon by the numbers
The marked distance is calibrated. Unmeasured illustration details are representative.
Proxima Centauri
Diameter: 214,300 km; rounded model.
A rounded red-dwarf reference. Radius and mass are approximate.
Defined examples — our methodology
The marked diameter is calibrated. Unmeasured illustration details are representative.
Use the visual comparison to explore its scale, then check the measurements and sources.
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Why this measurement?
Why we use 384,400 km
We compare the Earth–Moon distance. This is an average value; individual or instantaneous measurements may vary.
Average centre-to-centre distance. The Moon’s orbit is not a circle.
The marked horizontal span follows the measured feature, not the edges of the image. How calibrated comparisons work →
Recorded properties
Dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 384,400 km | Not recorded | average |
Around this scale
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Compare examples with lower, similar and higher values. Each card names the measurement being compared.
Sources and method
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The source records and measurement method remain available for inspection.
- NASA — Earth and Moon by the numbersMean radius and average orbital distance; rounded values.
More ways to see it
Curated comparisons
There’s always another scale
Follow your curiosity.
SpaceEarth12,740 kmEarth is the rocky planet on which we live and the third planet from the Sun.
SpaceMoon3,475 kmThe Moon is Earth’s natural satellite and the brightest large object in Earth’s night sky.SpaceEarth–Sun distance1 AUThe Earth–Sun distance, or astronomical unit, is the standard measure of separation between Earth and the Sun used in astronomy.
SpaceProxima Centauri214,300 kmProxima Centauri is a red dwarf star and the closest known star to the Sun.
SpaceJupiter139,800 kmJupiter is a giant planet composed mainly of hydrogen and helium, orbiting the Sun beyond the asteroid belt.
SpaceSaturn116,500 kmSaturn is a giant planet made mostly of hydrogen and helium, distinguished by its extensive ring system.
SpaceSun1,391,000 kmThe Sun is the star at the centre of the Solar System.
SpaceUranus50,720 kmUranus is an ice giant planet with a blue-green atmosphere, orbiting the Sun on its side.