The most aggressive down-facing surface in your model, measured from a vertical wall. A flat ceiling or bridge is 90°.
Drag to see whether a surface at this angle prints clean, prints rough, or needs support for the selected material and conditions.
How angles are measured — Overhang angle here is measured from a vertical wall (0°), the same convention Cura and most slicers use for the "support overhang angle" setting. A flat ceiling or bridge is 90°. The classic "45° rule" is a safe baseline; well-cooled PLA routinely holds 55–60° and good machines push further.
These are starting points, not guarantees — Real-world overhang, support, and wall behavior depend on your specific printer, cooling, speed, and filament batch. Use these tools to choose a sensible default, then validate critical parts with a quick test print. Cross-check fit on the Tolerance & Fit Calculator and material limits in the Filament Material Guide.
