Will This Furniture Actually Fit? Simulate It in Your Room with Google Gemini
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Have you ever found a piece of furniture online and thought, “It looks great… but will it match my room?” or “Is the size really right?” That uncertainty—especially about scale and overall compatibility—is one of the hardest parts of buying furniture online or even in-store.
In this guide, I’ll show you a surprisingly simple way to create a “try-it-in-your-room” image by compositing furniture into your own room photo using Google’s AI, Gemini.
Why Gemini Works Well for Furniture Placement (as of 2025-12-26)
There are AR apps and interior design tools, but they can be tricky to use, and they often don’t have the exact furniture model you want. With Gemini, you can upload photos and give clear instructions, and it can help you:
- Recreate realistic scale: Use a known measurement (like cabinet height) as a reference so the inserted furniture matches your room’s proportions.
- Blend lighting and shadows: Adjust shading and texture so the furniture looks more natural in the scene.
- Refine with simple language: Requests like “move it slightly left” or “match the height” are easy to iterate.
Hands-On Example: Simulating a Chair Next to a Cabinet
For this test, I created an image of a new chair placed next to a cabinet near the window in a living room. I used the cabinet as the scale reference.
Reference and Furniture Measurements (inches first)
- Cabinet height: 34.6 in (approx. 88 cm)
- Chair size: W 22.8 in (approx. 57.9 cm) × D 21.7 in (approx. 55.1 cm) × H 26.8 in (approx. 68.1 cm), seat height (SH) 16.5 in (approx. 41.9 cm)
What You Need
- A room photo: Take a smartphone photo of the spot where you want to place the furniture.

- A furniture photo: Use an image from the product page or a photo you took in a store.
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- Gemini: Available with a Google account (features/pricing may change over time).
Prompt Tips: How to Instruct Gemini
The key is to provide at least one real-world measurement in the scene, then ask Gemini to match the scale. Here’s an example prompt you can copy:
“Please place the chair from the second photo into the first photo and create an image. The cabinet on the left is 34.6 inches (approx. 88 cm) tall, and the chair is 26.8 inches (approx. 68.1 cm) tall, so please match the scale accordingly.”
Result: You Can See Fit and Balance Before Buying
With a realistic composite image, you can quickly judge:
- Whether it feels too big or too small in the room
- How it balances with windows, outlets, and nearby furniture
- Whether the color/material seems to harmonize (at least as a first check)
This can reduce the risk of “It looked different than I expected” after delivery.
3 Benefits for Interior Lovers
- Fewer regrets after delivery: Avoid mistakes like “too large,” “too small,” or “the color feels off.”
- Check visual harmony: Confirm how wood tones and textures work with your floor and existing furniture.
- Easier family agreement: Sharing a preview image makes big purchase decisions smoother.
Conclusion: AI Makes “Try Before You Buy” Much Easier
Furniture shopping is evolving. Instead of only measuring with a tape measure, you can now try placing furniture virtually using AI. With Gemini, a smartphone photo and a clear prompt can give you a highly useful preview image.
Next time you find furniture you love, try simulating it first—and enjoy building your ideal room with more confidence.
Appendix: Limitations and Important Notes
AI simulation is extremely helpful, but it’s not perfect. Here are common limitations to keep in mind:
- Exact product details may drift: Handles, small ornaments, or fine design features can change in the generated result.
- Color accuracy is not guaranteed: Lighting conditions can shift walnut tones and other subtle colors compared to real life.
- Complex multi-item layouts can be unstable: Placing many items at once may cause misalignment or design mixing.
For critical decisions, confirm measurements carefully and consider professional advice if needed.

