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SPLINE in AutoCAD — Draw Smooth Curves (No Arcs Needed)

Lesson notes for the CAD Land video — the exact command, what it does, and how to repeat it on your own drawing.

AutoCAD · 2026-10-15

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⌨️ Command used in this video

SPLSPLINE — Smooth curve through fit pointsSee it in the command dictionary →

📝 How to do it yourself

Type SPL and press Enter.
Click the first fit point.
Keep clicking points along the path you want. The curve follows them smoothly.
Press Enter to finish. Press C before finishing to close the curve.

ℹ️ What SPLINE actually does

Draws a smooth free-form curve that passes through the points you pick. Unlike a polyline with arcs, a spline has continuous curvature with no visible joints.

When to use it

Use it for organic shapes, site contours, road centrelines, hand-drawn paths and anything that should look naturally curved rather than built from arcs.

⚠️ Common mistakes

Using SPLINE where a PLINE with arcs would stay editable and offset cleanly.
Placing too many points — fewer points give a smoother curve. Three or four well-placed points usually beat ten.
Trying to offset a spline when you need an exact parallel distance — the result is an approximation.

🔗 Related commands

PLINE ARC BLEND FIT

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