400 to 500 million km
It is difficult to quantify how many Mars planets equal one Earth due to the vast differences in size and composition between the two planets. However, it is estimated that it would take around 6.5 Mars planets to equal the mass of Earth.
At its closest point, Mars is 35 million miles (56 million km) from Earth.
The diameter of Mars is just over half the diameter of Earth.To be accurate, it depends on where you measure it.The equatorial radius of Mars is 3,396.2 km which is 0.533 Earth's 6,378.1 km.The polar radius of Mars is 3,376.2 km which is 0.531 Earth's 6,356.8 km.
Earth is closer to the Sun Earth is 92,960,000 miles (149,600,000 km) Sun, Distance to Earth Mars is141,600,000 miles (227,900,000 km) Mars, Distance from Sun
Mars is on average about 225 million km away from Earth. However, the distance between Earth and Mars can vary due to their elliptical orbits around the Sun.
The diameter of the Earth is about 7,926 miles (12,756 km). The diameter of Mars is about 4,222 miles (6790 km) - roughly half that of Earth.
On March 3rd of 2012, Mars will be 100 million km from the Earth.
Earth is closer than Mars. Earth's average distance from the sun is 150 million km, while Mars' average distance is 227 million km.
Earth is bigger than mars because its the biggest inner planet out of all four inner planets.
Mars is at an average distance of 78 million km from Earth but can come as close as 55.7 million km during a close approach.
The diameter of Mars is approximately 6,779 km (4,212 miles), making it about 0.532 times the diameter of Earth.
It ranges from 413,200,000 to 498,400,000 km.