How Far Is the Moon from Earth? Miles, KM & Travel Time

Every clear night, you can look up and see it hanging there—a quarter-million miles away, yet close enough to cast real shadows. That paradox is what makes the Moon feel simultaneously near and impossibly far.

Average Distance: 238,855 miles (384,400 km) · Travel Time (Rocket): 3 days · Light Travel Time: 1.3 seconds

The table below consolidates the key distance measurements referenced throughout this article.

How far is the Moon from Earth?

NASA measures the average Earth-Moon distance at exactly 238,855 miles (384,400 km). That figure represents a time-averaged mean across thousands of orbits—a midpoint between the Moon’s nearest and farthest passes around our planet.

In miles

At perigee—the point in its orbit when the Moon swings closest—the distance shrinks to 225,623 miles (363,104 km). At apogee, when the Moon reaches its farthest point, that gap stretches to 252,088 miles (406,696 km) NASA Space Place. That’s a swing of roughly 26,500 miles depending on where the Moon sits in its elliptical path.

In kilometers

Express the same range in metric: 363,104 km at perigee, 406,696 km at apogee, with the average settling at 384,400 km Royal Museums Greenwich. The variation of more than 43,000 km between closest and farthest points sounds dramatic until you realize the Moon spans only about 3,474 km in diameter—a relatively narrow band for a body that large.

Relative to Earth size

NASA Space Place offers a useful mental image: the average distance equals roughly 30 Earth diameters lined up end to end NASA Space Place. At apogee, you could fit nearly 32 Earths in that gap; at perigee, about 28 to 29. The apparent size of the Moon in our sky shifts by more than 15% across that range, which is why a “supermoon”—when perigee aligns with a full Moon—looks noticeably larger than average.

The implication: perigee and apogee create a visible 15% shift in apparent size, making the Moon measurably larger during supermoons than when near apogee.

How long does it take you to get to the Moon from Earth?

Speed determines the crossing time. Light zips the gap in 1.3 seconds; a human-rated rocket typically needs three days. The range between those two benchmarks tells you just how far we’ve actually pushed the physics of travel.

Rocket travel time

Most spacecraft follow a “free return” trajectory—essentially the path Apollo missions used—that takes roughly three days to complete the journey Space.com. Apollo 11 itself required 4 days, 6 hours, and 45 minutes Space.com, though the orbital mechanics of that era allowed some flexibility. More efficient Hohmann transfers can stretch that to around five days Space.com. NASA’s Lunar Reconnaissance Orbiter took roughly four days to arrive at its operational distance of 382,000 km NASA Space Math. The fastest uncrewed passage on record: New Horizons whipped past the Moon in just 8 hours and 35 minutes Space.com.

Light travel time

Light moves at 186,282 miles per second. Crossing the average 238,855-mile gap takes 1.3 seconds Royal Museums Greenwich. At perigee, that shrinks to 1.2 seconds; at apogee, it stretches to 1.4 seconds. NASA’s Glenn Research Center notes that signals from the Lunar Reconnaissance Orbiter require 2.6 seconds round-trip at 382,000 km NASA GRC—a delay that becomes critical when operating rovers by remote control.

Historical missions

Apollo 10 holds the record for fastest human speed en route to the Moon: 24,791 mph (39,897 kph) achieved on May 26, 1969 Space.com. No crewed mission has exceeded that velocity since. Modern uncrewed probes have surpassed it—Parker Solar Probe’s 10th flyby in November 2021 registered 364,621 mph Space.com, though that craft was slingshotting toward the Sun, not committed to a Moon landing.

The pattern: crewed missions peaked at Apollo 10’s 24,791 mph, while uncrewed probes now routinely exceed that velocity—but those high speeds target the Sun or deep space, not lunar landings.

How far away will the Moon be from Earth in 100 years?

The Moon isn’t sitting still relative to Earth—it drifts slowly outward, adding distance with every orbit. The rate is small, but over decades and centuries, the accumulation becomes measurable.

Receding rate

Tidal interactions between Earth and the Moon transfer energy from our planet’s rotation into the Moon’s orbital motion. The result: the Moon recedes approximately 3.8 centimeters per year Universe Today. That measurement, confirmed through decades of lunar laser ranging experiments, is one of the most precisely known values in planetary science.

Future projections

Multiply that annual rate across a century: the Moon will sit roughly 3.8 meters—about 12.5 feet—farther away than it does today. The cumulative effect over millions of years is more dramatic, but within a human lifetime, the change is imperceptible without instruments. The practical consequence: tidal patterns shift slowly as the Moon pulls away, with the day lengthening by about 23 microseconds per century.

What this means: tidal energy planners and satellite operators must track recession carefully, though no mission planner needs to account for 3.8 meters today.

How many light years is the Moon away?

Short answer: it’s not even close to a light year. The Moon measures in light-seconds, not light-years—a difference of roughly eight orders of magnitude.

Conversion to light years

One light-year equals approximately 5.88 trillion miles. The Moon at 238,855 miles away covers just 0.000004% of that distance. Expressed as a fraction: the Moon sits 0.000123 light-years from Earth Universe Today. That’s a tiny decimal—putting the Moon in light-years is like measuring a football field in miles.

Why it’s tiny

Astronomers use light-years to express distances between stars, not objects within our solar system. The Sun, at 93 million miles, lies only 8.3 light-minutes away—not even a full light-year. Our nearest stellar neighbor, Proxima Centauri, sits 4.24 light-years distant. The Moon’s 1.3 light-second gap puts it in the same category as low Earth orbit satellites—a neighborhood distance by cosmic standards.

The catch: confusing light-seconds with light-years remains one of the most common astronomical misconceptions—the numbers look similar until you realize a light-year encompasses 31.5 million seconds.

How far is the moon from Sun?

The Moon orbits Earth, but Earth orbits the Sun—and that dual relationship means the Sun-Moon distance closely tracks the Sun-Earth distance for most of the lunar orbit.

Earth-Sun vs Moon-Sun

The Sun sits roughly 93 million miles from Earth. Because the Moon only orbits about 238,855 miles from our planet, the Sun-Moon distance varies between roughly 92.76 million and 93.24 million miles depending on where the Moon sits relative to Earth Royal Museums Greenwich. The difference amounts to less than 0.5%—essentially negligible compared to the 93-million-mile baseline.

Orbital differences

Earth’s orbital path around the Sun dominates the Earth-Sun distance. The Moon’s smaller orbit produces secondary variations. Notably, when the Moon is between Earth and the Sun (at new Moon), the Sun-Moon distance equals Sun-Earth minus the lunar orbital radius. When the Moon trails behind Earth, the Sun-Moon distance adds that radius instead. The maximum swing of 477,710 miles between perigee and apogee translates to less than half a percent variation in solar distance.

The implication: the Moon receives nearly identical solar radiation as Earth experiences. Lunar surface temperatures swing from +127°C in daylight to -173°C at night—not because the Moon is significantly closer or farther from the Sun, but because it lacks the atmosphere that moderates Earth’s temperature swings.

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Rocket travel times across the 238,855-mile average distance vary, as the recent Firefly Blue Ghost moon landing proved with its successful 45-day lunar journey.

Frequently asked questions

The Moon sits close enough that astronauts visited it six times, yet far enough that crossing the void required navigating engineering limits we still respect today. For mission planners and space enthusiasts alike, knowing the precise distance—whether in miles, kilometers, or Earth diameters—grounds ambition in reality. Artemis aims to establish a sustainable presence there, and understanding that 384,400-kilometer baseline shapes every trajectory calculation and fuel estimate that makes those plans possible.