The distance between Earth and Mars varies constantly because both planets follow elliptical orbits around the Sun at different speeds. There’s no single fixed number—it’s dynamic, ranging from a minimum of about 55 million km (34 million miles) at closest approach (during favorable oppositions) to a maximum of around 401 million km (249 million miles) when they’re on opposite sides of the Sun.
Average distance (mean over time): Approximately 225 million km (140 million miles), or about 1.52 AU (Astronomical Units, where 1 AU is the average Earth-Sun distance, roughly 150 million km).
As of February 21, 2026 (the current date), Mars is relatively far from Earth. Reliable astronomical data sources report the current geocentric distance as approximately:
351–352 million kilometers (about 218 million miles)
This equals roughly 2.35 AU
Light takes about 19 minutes and 33–34 seconds to travel one way between the planets at this separation, meaning any signal (like radio communication from a Mars rover) would have that delay.
Why So Far Right Now?
In early 2026, Mars recently passed through superior conjunction (January 2026), when it was on the far side of the Sun from Earth—making it temporarily “hidden” behind the Sun and at one of its maximum distances. By February 21, 2026, Earth and Mars are still separating somewhat but starting the phase where Earth begins catching up in orbit. Mars will gradually get closer over the rest of 2026, reaching its next opposition (when it’s opposite the Sun in our sky, at minimum distance for that cycle) on February 19, 2027. At that point, the distance will drop to about 101 million km (63 million miles), or ~0.68 AU—one of the more distant oppositions due to Mars being near its aphelion (farthest point from the Sun).
(Conceptual diagram of Earth and Mars orbits showing variable distance; closest at opposition, farthest at conjunction.)
Quick Comparison Table
Scenario
Distance (approx.)
In km
In miles
In AU
When (typical)
Closest possible (theoretical min)
~55 million km
54.6 million
33.9 million
0.37
Rare perfect alignment
Recent/record close
~56–96 million km
Varies by opposition
Varies
~0.4–0.64
e.g., 2003, 2025
Current (Feb 21, 2026)
~352 million km
351–352 million
~218 million
2.35
Post-conjunction phase
Farthest possible
~401 million km
401 million
249 million
~2.67
Opposite sides of Sun
Average
225 million km
225 million
140 million
1.52
Long-term mean
Next close (Feb 2027 opp.)
~101 million km
101 million
63 million
0.68
February 19–20, 2027
This variability is why missions to Mars (like NASA’s Perseverance or future crewed ones) launch during specific “windows” every ~26 months when the planets are closer—reducing travel time and fuel needs (typically 6–9 months one-way).
If you’re asking for travel implications, communication delays, or visibility in the sky right now (Mars is currently faint and low in the morning sky in Capricornus, magnitude ~1.1, not very prominent), let me know for more details!
The distance between Earth and Mars changes constantly because both planets move around the Sun at different speeds.
Average distance
About 225 million kilometers (around 140 million miles).
Closest distance (when the planets align on the same side of the Sun)
About 54.6 million kilometers (about 33.9 million miles).
Farthest distance (when they are on opposite sides of the Sun)
About 401 million kilometers (about 249 million miles).
Because of this changing distance, spacecraft travel times to Mars usually range from 6 to 9 months.