Approximately 1.3 million Earths can fit inside the Sun by volume.
This stunning comparison highlights the Sun's immense scale compared to our planet, a fact that's captivated astronomers and sparked endless discussions online.

Volume Calculation Basics

The Sun's diameter is about 109 times Earth's, giving it a radius roughly 109 times larger too.
Since volume scales with the cube of the radius, the Sun's volume is (109)3≈1.3(109)^3\approx 1.3(109)3≈1.3 million times Earth's—meaning you could fill it with 1.3 million Earth-sized spheres if they were liquid or "squishy," packed without gaps.

Earth's volume is 1.083×10121.083\times 10^{12}1.083×1012 km³, while the Sun's is 1.412×10181.412\times 10^{18}1.412×1018 km³, confirming the ratio precisely.

Real-World Packing Challenges

Spheres like Earth don't pack perfectly; the most efficient arrangement (hexagonal close-packing) fills only 74% of space, leaving gaps.
Accounting for this, experts estimate ~960,000 to 962,000 Earths could actually fit as rigid spheres inside the Sun's volume.

A YouTube analysis using Python code and scale models arrived at a similar "realistic" count below 1.3 million, debunking the simplistic figure entertainingly.

Forum and Expert Perspectives

"About 1.3 million Earths could fit inside the Sun if the Earths were squishy and packed together with no gaps. However... the actual number is closer to 960,000."

Reddit threads like r/STEW_ScTecEngWorld buzz with this in late 2024, blending math with fun hypotheticals—one user noted 74% packing efficiency flips the scenario, needing ~3.7 million Earths for the Sun's volume to fit in their gaps!

Others point out the Sun's gaseous nature means it isn't a rigid container; adding Earths would expand it via gravity until collapse.

Universe Today (2025 update) sticks to the 1.3 million baseline for simplicity, emphasizing the Sun dominates 99.86% of our Solar System's mass (333,000 Earth masses).

Quick Comparison Table

Aspect| Sun| Earth| Ratio
---|---|---|---
Diameter| ~1.39 million km1| ~12,742 km1| 109 times1
Volume| 1.412×10181.412\times 10^{18}1.412×1018 km³7| 1.083×10121.083\times 10^{12}1.083×1012 km³7| ~1.3 million7
Mass| 1.989×10301.989\times 10^{30}1.989×1030 kg7| 5.972×10245.972\times 10^{24}5.972×1024 kg7| 333,000 times1
Earths (Ideal)| N/A| N/A| 1.3 million3
Earths (Packed)| N/A| N/A| ~960,0005

This mind-bending scale underscores why the Sun, a medium star, powers our system effortlessly. Trending in science forums into 2025, it's a timeless reminder of cosmic proportions!

TL;DR: 1.3 million Earths by raw volume, ~960,000 with realistic packing—gaps matter!

Information gathered from public forums or data available on the internet and portrayed here.