moonsize - JONEScience.com

Earth-Moon Scale Calculator

You’ve picked a size for your Earth model. Now, how big and how far away do you *think* the Moon should be? Enter your guesses below to see how close you are!

1. Your Scaled Earth Diameter (cm):

2. Your *Guessed* Moon Diameter (cm):

3. Your *Guessed* Distance Apart (cm):

Please enter positive numbers in all fields.

🌙 Moon Diameter

Correct Size:

Error (cm):

Error (%):

📏 Distance Apart

Correct Distance:

Error (cm):

Error (%):

Visual Comparison

Size: Earth vs. Moon

Your Earth

Your Moon Guess

Correct Moon

Distance: Your Guess vs. Correct

Your Guess:

Correct Distance: