How big is Venus compared to Earth?
≈ Earthalmost the same size
Venus is almost exactly Earth’s size — 95% of its width — 12,104 km across against Earth’s 12,742 km. By volume, Venus has about 86% of Earth’s volume. It has about 82% of Earth’s mass, and its surface gravity is 0.91× Earth’s.
▶ See Venus next to Earth in 3D
Side by side
Width vs Earth
95% (near-twin)
Volume vs Earth
86% of Earth’s
Mass vs Earth
about 82% of Earth’s mass
Surface gravity
0.91× Earth (8.9 m/s²)
You’d weigh
64 kg (if 70 kg here)
Diameter
12,104 km
Venus is so close to Earth in size and mass that the two are often called twins — and yet it is about as hostile a world as the solar system offers.
What that actually feels like
Venus is what happens when a greenhouse effect runs away completely. Although Mercury is closer to the Sun, Venus is hotter — its dense CO₂ atmosphere traps heat so effectively that the surface stays around 464 °C day and night, pole to equator. It rotates backwards so slowly that its day is longer than its year, and its cloud deck rains sulphuric acid that evaporates before it lands.
Ratios on a page are easy to nod along to and impossible to picture. In the interactive view, switch to True scale to see Venus and Earth at their honest relative sizes.
Keep going
✓ Facts verified July 2026
Every figure on this page is a real, rounded value checked against primary sources. Found something out of date? See how we keep it accurate.