Venus is almost the same size as Earth: it’s just a bit smaller—about 95% of Earth’s diameter, roughly 86–90% of its volume and surface area, and about 82% of its mass.

How Big Is Venus Compared to Earth?

Quick Scoop

If you could put Venus and Earth side by side, they’d look like near twins—more like an older and slightly smaller sibling than a distant cousin.

  • Venus diameter: about 12,104 km.
  • Earth diameter: about 12,742–12,756 km.
  • So Venus is roughly 95% as wide as Earth.
  • Venus’s volume: about 86% of Earth’s.
  • Venus’s surface area: about 90% of Earth’s.
  • Venus’s mass: about 81–82% of Earth’s.

In everyday terms: if Earth were a soccer ball, Venus would be the same ball with just a thin layer shaved off the outside.

Side‑by‑Side Size Numbers

[3][7] [1][7][3] [1][3] [9][3][1] [3][9][1] [9][1][3] [1][9] [9][1] [1][9] [9] [9] [9] [7][3][1][9] [7][3][1][9] [3][7][1][9]
Property Venus Earth Venus vs Earth
Diameter ≈ 12,104 km ≈ 12,742–12,756 km ≈ 95% of Earth’s
Mean radius ≈ 6,052 km ≈ 6,371 km Venus is slightly smaller
Volume ≈ 0.86 × Earth’s volume 1.0 (reference) About 86% as much
Surface area ≈ 90% of Earth’s 100% (reference) Only ~10% less area
Mass ≈ 4.87 × 10^24 kg ≈ 5.97 × 10^24 kg ≈ 81–82% of Earth’s mass

A Tiny Difference That Feels Huge

From a distance, their sizes are so close that astronomers often call Venus Earth’s “twin.”

Yet that small size difference means:

  • Slightly lower gravity at the surface (because of the lower mass).
  • A slightly smaller surface area to spread heat over, which matters since Venus traps heat extremely well with its thick atmosphere.

So while Venus is almost Earth‑sized, it’s absolutely not Earth‑like in terms of conditions.

Mini Story: If You Shrank Earth

Imagine you have a perfectly round globe of Earth and you sand it down evenly all around until you’ve removed only about the area of Asia from its surface—what’s left is roughly Venus’s surface area.

That’s how close the two really are in size, even though one is a blue world and the other is a super‑hot, cloud‑covered inferno.

Why This Is a Trending Topic

People keep revisiting “how big is Venus compared to Earth” because new missions are being planned to study Venus’s past, atmosphere, and geology.

As space agencies talk more about Venus again, its near‑twin size to Earth makes everyone wonder whether it was once more habitable than its current extreme state.

TL;DR: Venus is almost as big as Earth—about 95% of its diameter, ~86–90% of its volume and area, and ~82% of its mass—so in size terms, it’s Earth’s slightly smaller twin.

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