3D

3D Height Comparison Tool

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v2: cleaner UI, more models, and better exports

This v2 update refreshes the 3D comparison UI, adds more catalog models, supports custom 3D model comparison, offers high-quality model compression, and improves image export, video export, and share links.

v1: more ways to feel real size

Walk mode lets you stand at an estimated eye height and feel how tall the objects are in front of you. Free mode gives you a bird's-eye camera for exploring the whole scene, and you can export images or videos. This v1 update adds more viewpoints, more object categories, cleaner models, and a smoother viewing experience. If HowHeight feels interesting or helpful, feel free to share it. If you find a bug or have a new idea, contact me at support@howheight.com.

Planet comparison

A dedicated planet comparison site has been added. You can compare planet sizes side by side, view their orbits, and compare their mass.

Open planet comparison

Quick notes for height, size, and length comparison

Use the 3D scene to compare body height, overall size, and animal length at the same time.

Male and female models can be set from 80 cm to 300 cm, so you can read height differences while keeping a predictable human reference in the scene.

The animal, dinosaur, sea-life, and basketball hoop models are fixed-scale references. Their height and length stay locked, making the scene better for size comparison, body-size reading, and length comparison against people.

  • Supported human input range is 80 cm to 300 cm.
  • Use the head guide lines and ruler for height comparison.
  • Use fixed catalog scale to compare overall size and length.
  • Length-based sea life includes the blue whale, orca, great white shark, dolphin, whale shark, and sperm whale.

How to read the scene

Use the orthographic views for measured comparison, or free view for manual inspection.

Front and side views use orthographic cameras so the height difference does not change with camera distance. Orbit and Walk use perspective cameras, and Free view lets users rotate and zoom the scene manually.

  • The ground line keeps both people bottom-aligned.
  • Head guide lines mark each exact height.
  • The ruler and difference label make the visual gap easier to scan.