Boolean
Modify parts by merging parts or surfaces together (Union), removing a part/surface from a target (Subtract), or calculating the intersection between two or more parts or surfaces (Intersect).
This functionality is available on Onshape's browser, iOS, and Android platforms.

In the Feature toolbar:
Modify parts by merging parts or surfaces together (Union), removing a part/surface from a target (Subtract), or calculating the intersection between two or more parts or surfaces (Intersect).

- Click
.
- Select an operation type:
- Union - Merge parts or surfaces.
- Subtract - Remove parts, allowing for an offset between parts or surfaces, if desired.
- Intersect - Merge parts or surfaces, keeping material only where intersections exist.
- Select tools.
- If the operation is Subtract, also select:
- Targets - The part or surface being acted upon
- Offset (optional) - Create a gap between the remaining parts or surfaces
- Keep tools (optional) - Check to keep the entities, or uncheck to remove the entities from the Part Studio
If you select Offset, also select Faces to offset, Offset distance, Direction of offset, and optionally toggle Reapply fillet.
- If the operation is Intersect, optionally select Keep tools.
- If the operation is Subtract, also select:
- Click
.

Boolean to merge.
Before:
After:

Boolean to remove parts.
Before:
After:
Boolean to remove parts and apply an offset between parts (or surfaces).
Before:
After:

Boolean to merge parts or surfaces, keeping material only where overlapping geometry exists.
Before:
After:

- With the Subtract option, you have the choice to use the Keep tools checkbox to keep the parts or surfaces used to cut the main entity. This is useful when creating fitted parts or surfaces within the Part Studio.
- Use the Intersect option to keep only the material that intersects the selected parts or surfaces.
- When parts or surfaces are merged and as a result some entities no longer exist, the attributes of the earlier selected entity (such as part name) are retained.


- Tap Boolean tool.
- Select an operation type:
- Union - Merge parts or surfaces
- Subtract - Remove parts or surfaces
- Intersect - Merge parts or surfaces, keeping material only where intersections exist.
- Select tools.
If the operation is Subtract, also select:
- Targets
- Offset (optional)
Keep tools (optional)
If you select Offset, also select faces to offset, offset distance, direction of offset, and optionally toggle reapply fillet.
If the operation is Intersect, also select:
- Keep tools (optional)
- Tap checkmark.

Boolean to merge parts or surfaces.
Before:
After:

Boolean to remove parts or surfaces.
Before:
After:

Boolean to merge parts or surfaces, keeping material only where intersections exist.
Before:
During:
After:

- With the Subtract option, you have the choice to use the Keep tools checkbox to keep the parts or surfaces used to cut the main entity. This is useful when creating fitted parts or surfaces within the Part Studio.
- Use the Intersect option to keep only the material that intersects the selected parts.
- When parts or surfaces are merged and as a result some entities no longer exist, the attributes of the earlier selected entity (such as part name) are retained.


- Tap Boolean tool.
- Select an operation type:
- Union - Merge parts or surfaces
- Subtract - Remove parts or surfaces
- Intersect - Merge parts or surfaces, keeping material only where intersections exist.
- Select tools.
If the operation is Subtract, also select:
- Targets
- Offset (optional)
Keep tools (optional)
If you select Offset, also select faces to offset, offset distance, direction of offset, and optionally toggle reapply fillet.
If the operation is Intersect, also select:
- Keep tools (optional)
- Tap checkmark.

Boolean to merge parts or surfaces.
Before:
After:

Boolean to remove parts or surfaces.
Before:
After:

Boolean to merge parts or surfaces, keeping material only where intersections exist.
Before:
During:
After:

- With the Subtract option, you have the choice to use the Keep tools checkbox to keep the parts or surfaces used to cut the main entity. This is useful when creating fitted parts or surfaces within the Part Studio.
- Use the Intersect option to keep only the material that intersects the selected parts.
- When parts or surfaces are merged and as a result some entities no longer exist, the attributes of the earlier selected entity (such as part name) are retained.
Was this article helpful?