What is the Sun's mass compared to Earth?

The Sun's mass is about 333,000 Earth masses. In other words, roughly 333,000 Earths would be needed to match the Sun's mass, although the exact comparison depends slightly on the measured values and rounding used.

The Sun's enormous mass makes it the dominant gravitational body in the Solar System. It contains about 99.86% of the Solar System's total mass, while all eight planets, dwarf planets, moons, asteroids, and comets together account for only a small remainder. Jupiter is the most massive planet, but even Jupiter has only about one-thousandth of the Sun's mass.

Mass is not the same as size. The Sun's diameter is about 109 times Earth's, while its volume is about 1.3 million Earth volumes. The lower mass-to-volume comparison reflects the fact that the Sun is made mostly of hot plasma and has a much lower average density than Earth.

The Sun's gravity also keeps the planets in orbit and compresses its core enough to sustain nuclear fusion. That fusion converts hydrogen into helium and supplies the energy that powers sunlight.