Perfect Circle Test

How accurately can you draw a circle by hand? Take the test and find out.

▶ Take the Circle Test Now

What Is the Perfect Circle Test?

The perfect circle test is a fun challenge that measures your freehand drawing accuracy. You draw a circle around a center point on your screen — using your finger on mobile or your mouse on desktop — and the game instantly calculates how close your circle is to mathematically perfect.

Your score ranges from 0% to 100%. A score of 100% means every single point you drew is at the exact same distance from the center — a flawless circle. In practice, scores above 90% are extremely rare and impressive.

The test has been played over 46,000 times since launch. The average score is around 52%, and only about 3% of all attempts score above 90%.

Score Rankings — How Do You Compare?

▶ Start Drawing — See Your Score

How the Circle Accuracy Test Works

When you finish drawing, the algorithm analyzes your circle in three steps:

1. Find the center — it calculates the centroid of all your drawn points
2. Calculate average radius — the mean distance from center to each point
3. Measure deviation — how much each point deviates from that ideal radius

Less deviation = higher score. The math is elegant: a perfect circle has zero deviation because every point sits at the same distance from center. Want the full technical breakdown? Read how we calculate accuracy.

Tips to Score Higher on the Circle Test

1. Use Your Whole Arm

Lock your wrist and draw from your shoulder. This creates a natural pivot point that produces smoother, rounder curves than wrist-only drawing.

2. Draw at Medium Speed

Too slow and you'll wobble. Too fast and you'll lose control. Find a steady, confident speed and commit to one continuous motion.

3. Close the Circle

Make sure your starting point and ending point overlap. A gap or overlap will hurt your score because it creates an area of high deviation.

4. Practice the Ghost Overlay

After your first attempt, the game shows your best circle as a faint ghost. Use it to see where you deviated most and focus on improving those sections.

For more detailed techniques, read our complete guide to drawing perfect shapes or the article on 5 techniques to improve your score.

Beyond Circles — Test Other Shapes

Think circles are hard? The game also includes three other freehand shape challenges:

• Square Test ⬛ — Four straight lines, four perfect 90° corners
• Triangle Test 🔺 — Three equal sides, three 60° angles
• Hexagon Test ⬡ — Six sides, the most challenging shape

Plus there's a Daily Challenge that features a different shape every day — a great reason to come back and test yourself regularly.

▶ Take the Perfect Circle Test

Frequently Asked Questions