Draw a semicircle — Freehand Drawing Game

The one-stroke drawing test

Can you draw a perfect semicircle?

Test your precision by drawing a semicircle in one single stroke. Draw the Perfect Shape is a freehand accuracy game. Pick a shape, draw it in a single continuous stroke, and get an instant, honest score for how close you came to perfect.

No sign-up, no ads, no downloads — it runs right in your browser.
Works with mouse, trackpad, touch and stylus.
78 shapes to master, from a simple circle to a spiral.

How to draw a semicircle

How to draw a flawless semicircle

Drawing this shape requires practice and confidence. The secret is to commit to one fluid motion — then let the score tell you the truth about how accurate it really was.

Visualize the entire shape before you begin drawing.
Find an anchor point and sweep your stroke around smoothly.
Try to execute the drawing using your arm rather than just your wrist.
Keep a steady pace to prevent the line from becoming shaky.
Finish the stroke cleanly to get the most accurate score.

How it works

Three steps to your score

There is nothing to learn. Choose, draw, and read your result — the whole loop takes about five seconds.

Pick a shape from the bar at the bottom of the screen.
Press and draw it in one stroke, anywhere you like.
Release to see your accuracy score and the ideal overlay.

The perfect Semicircle drawing game

A Semicircle drawing game that actually relaxes you

This is the drawing game to open when you need a moment away from everything else. Sketch the Semicircle in one confident stroke and watch the score tell you the truth — no filters, no fake celebration. It's short enough to fit in a five-second break and honest enough that you'll want another go.

Perfect coffee-break game — a single Semicircle attempt takes five seconds flat.
Quiet focus training: one hand, one line, one honest score.
Beats a phone-scroll spiral — draw a Semicircle, breathe, feel a bit less wired.
Kids love the Semicircle challenge; grown-ups love that it never gets easier.
No ads, no sign-up, no downloads — open a tab and play the Semicircle game.

Live colour feedback

Feel your accuracy as you draw

Your trail colours itself in real time — green where you are dead on, amber where you drift, red where you are well off. You never have to wait for the final number to know how you are doing.

Honest, calibrated scoring

How your score is calculated

Your stroke and the perfect semicircle are both resampled into evenly spaced points, then the ideal is fitted onto your drawing. Your score is how far your line sits from that best possible fit.

Draw at any size, anywhere — scale and position never count against you.
A clean freehand attempt lands near 89%. 98%+ is close to machine-perfect.
Letters and numbers stay orientation-locked, so a rotated 6 is never a 9.

Explore More

Mastering corners and curves on the semicircle

Drawing a complex shape like a semicircle in one stroke requires you to plan ahead. You have to maintain your flow while executing tight turns, without lifting the pen once.

Start your stroke at a natural anchor point, like a top corner or edge.
Cross the shape confidently when required, keeping your hand steady.
Focus on the symmetry; the angles should match as you return to the start.
A perfect semicircle has flawless proportions.
Try it in Easy mode first, then switch to Hard for a real test of your aim.

78 shapes, 8 categories

Far more than just a semicircle

The best-known competitor offers four shapes. This offers seventy-eight — and every one of them is drawable in a single stroke.

Shapes — circle, square, star, heart, spiral and more.
Animals, Food, Nature and Things to keep younger players hooked.
Numbers and Letters that double as handwriting practice.

Step-by-step guides

How to draw semicircles, stars, squares and more

Every shape here is built to be drawn in one stroke, so learning one is learning them all: pick it, trace it, and read your accuracy. Circle, star, square, triangle, heart, straight line and dozens more.

How to draw a circle — one smooth sweep back to where you began.
How to draw a star — five straight lines, no lifting the pen.
How to draw a square — four even sides and square corners.
How to draw a straight line — the hardest easy shape there is.

The perfect semicircle test

The perfect semicircle test, leveled up

This is the same honest challenge with live colour feedback, an ideal-shape overlay, three difficulty modes and 78 shapes to beat — not just one lonely semicircle.

Instant, calibrated scoring you can actually trust — no lucky 100s.
See exactly where you drifted with the dashed ideal overlay.
Beat your personal best, then challenge a friend with a share link.

Your call

Easy, Normal or Hard

Change how strictly the same stroke is judged. Easy is forgiving enough for small hands; Hard demands near-machine precision. Personal bests and leaderboards are kept separately for each mode, so an Easy 99% never sits on a Normal board.

Who it is for