PARAMETRIC · 3D · STEP / STL / 3MF
HemisphereHEMISPHERE
Generate a solid or hollow hemisphere (dome) from diameter and shell thickness. Print-ready STEP, STL, 3MF.
- TypeSolid / hollow shell
- OrientationFlat side down
- OutputSTEP · STL · 3MF · DXF
LIVE · HEMISPHERE
⌀40
SCALE 1:1 · mm
Drag to rotate · scroll to zoom · right-drag to pan
CALCULATED · SPEC
AUTO-COMPUTED
V
16755.2mm³
Volume
A
3769.9mm²
Surface area
H
20.00mm
Height
HOW-TO
How to generate a hemisphere STEP / STL file
- 1Enter the diameter.
- 2For a bowl or lamp-shade shape, set a shell thickness (0 = solid).
- 3Check the spec cards and any warnings.
- 4Download STEP, STL or 3MF — or send it to Orinovate for a quote.
What is a hemisphere?
A hemisphere is half a sphere cut through its centre. Sitting on its flat face it is stable, so it is used for domes, knobs, keycaps, lamp shades and mould masters. Add a shell thickness to get an open dome for bowls, covers and guards.
Formulas
Solid: V = (2/3)πr³, dome area 2πr², total area 3πr². Shell with inner radius ri = r − t: V = (2/3)π(r³ − ri³), area = 2πr² + 2πri² + π(r² − ri²).
Specs at default parameters
| Parameter | Value | Range |
|---|---|---|
| Diameter (D) | 40 mm | 1–1000 |
| Shell thickness (t) | 0 mm | 0–200 |
| Volume (V) | 16755.2 mm³ | — |
| Surface area (A) | 3769.9 mm² | — |
| Height (H) | 20.00 mm | — |
FAQ
How do I print a solid hemisphere?
Print it flat side down — no supports needed. The top flattens out layer by layer, so a finer layer height (0.12–0.16 mm) gives a smoother crown.
How do I print the hollow dome?
Opening down, the crown is nearly horizontal and needs supports; flip it opening-up (as a bowl) in your slicer instead. Make the wall a multiple of the nozzle width, e.g. 1.2 or 1.6 mm for a 0.4 mm nozzle.
What are the hemisphere formulas?
Solid: V = 2/3·π·r³ and total area = 2πr² (dome) + πr² (base) = 3πr². Shell: V = 2/3·π·(r³ − ri³) with ri = r − t.
Which software opens the hemisphere STEP file?
STEP (AP214) opens in Fusion 360, SolidWorks, FreeCAD, Onshape and Rhino. STL / 3MF import directly into Bambu Studio, PrusaSlicer or Cura.
Is it free?
Yes — no sign-up, no fees. Need a physical part? Send it to Orinovate for an instant quote in FDM, SLA, SLS, MJF or CNC.
Related generators
Need a physical part?
Send the model straight to Orinovate's instant quote: FDM, SLA, SLS, MJF, metal printing and CNC, made in Hsinchu, Taiwan.
About STEP / STL / 3MF / DXF
- STEP (.step / .stp, AP214) keeps exact dimensions and surfaces for editing in Fusion 360, SolidWorks or FreeCAD.
- STL and 3MF are triangle meshes that import directly into Bambu Studio, PrusaSlicer or Cura.
- DXF is the top-view 2D outline, ready for laser cutting, waterjet or CNC routing.
- All models are in millimetres at true scale.