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How to Resize Objects in SketchUp — Scale Tool Guide
Sep
It’s easy to confuse the Scale tool and resize in SketchUp — watch the video to understand the difference and resize objects to exact dimensions.
How to Resize Objects in SketchUp with the Scale Tool — Tutorial Video
Steps by steps :
- Click the models you want to resize
- Select the Scale tool or press the S key
- Click an edge or face grip (not a corner grip), move the cursor to scale the entity
- Click to set your selection’s new resize
- Click an a corner grip is scale not resize
Scale Factor vs. Exact Size — Resizing in SketchUp
SketchUp has no separate “resize” tool — the Scale tool handles both scale and exact-size resize jobs, and what you type into the Measurements box after you grab a grip decides which one happens. Type a plain number (for example 2) and you get a relative scale factor; type a number with a unit suffix (2′, 500mm, 1.5m) and SketchUp treats it as the new absolute length of that grip’s axis. This is the single most common cause of “I typed 600 and my object became 600 times bigger” — the value was read as a factor because no unit was attached.
The grip you grab also controls the dimensionality. A corner grip scales uniformly in three axes at once; an edge grip scales two axes (the Measurements box shows two numbers separated by a comma, e.g. 2, 1.5); a face grip scales just one axis, so you can stretch one dimension while leaving the others untouched. Hold Ctrl (Option on Mac) to scale about the center instead of about the opposite grip, and hold Shift to force a uniform scale even from an edge or face grip.
Gotchas worth knowing
Dragging a grip past zero — or typing a negative value like -1 — mirrors the selection along that axis and silently reverses its face normals, so a mirrored object can render dark or export inside-out. If a flipped copy looks wrong, right-click the faces and choose Reverse Faces, or use Flip Along / the flip handles instead of negative scale when you only want a mirror.
Scaling a group or component with the Scale tool changes only that container’s transform, not the geometry inside — so wall thickness, holes and any nested components stretch with it, and the on-screen dimensions in Entity Info no longer match the raw edge lengths. When you need the real geometry resized cleanly (for fabrication, or before exporting), open the group/component and scale the edges and faces directly, or right-click the component and use Scale Definition so every instance updates. To resize an existing edge to an exact length without distorting anything else, the Tape Measure tool is often the better choice: measure the edge, type the target length, and confirm the model-wide resize prompt.
SketchUp 2026 is a named-user subscription (perpetual licenses ended in 2020), but the Scale tool behavior above is identical across the desktop, web and iPad versions, so any tutorial that predates the subscription change still applies to this tool.
