LEGO® Answers is a question and answer site for LEGO® and building block enthusiasts. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Can I build a model out of both DUPLO blocks and LEGO blocks? Do they fit together?

share|improve this question
Yes! I'm building with my kids right now using both LEGO and DUPLO bricks! The problems come when you try to use "LEGO compatible" blocks or off-brand/ generic blocks. Those aren't always compatible. But LEGO brand blocks and LEGO brand DUPLO work together just fine! – user5964 Jul 9 '15 at 4:43
up vote 43 down vote accepted

Yes! You can add LEGO on top of DUPLO, and DUPLO on top of LEGO. Here's an example picture from The Brick Blogger:

LEGO and DUPLO stacked on each other.

Because stacking LEGO on top of DUPLO requires the particular LEGO tube design on the bottom (to fit in the hollow top of the DUPLO bricks), many "LEGO-compatible" bricks do not share this compatibility with DUPLO - at best, you can stack DUPLO on top of them, but not the other way around.

share|improve this answer
I often use standard Lego bricks to build "custom" Duplo parts when building Duplo models with my kids. This is especially useful if you need 1x2x1 Duplo bricks, or run out of a necessary color of standard Duplo bricks. – Chris Jaynes Oct 25 '11 at 20:24
As far as I'm aware you can use only some types of Lego with Duplo. I'm not sure plates, tiles and other modified pieces can stack with Duplo. – Ambo100 Nov 1 '11 at 15:32
Duplo can sit happily on top of plates, but plates and tiles only balance on top of Duplo, there's no real clutch between them that way. – Zhaph - Ben Duguid Dec 8 '11 at 13:28
JANGBRiCKS has a nice video explaining this: – Lukas Renggli Jul 11 '15 at 15:28

Yes! Duplos are 8x the volume of the corresponding Lego bricks.

share|improve this answer
You are correct, but that fact does not prove that they fit together. As @Joe Wreschnig say in his answer, many "LEGO-compatible" bricks are not compatible with DUPLO, although they have the same volume (and "outer shape") as a LEGO brick. – awe Mar 23 '12 at 7:26

The answer is: Yes. In fact in my annual project I use a Duplo part that a friend got me from one of the Lego Land parks. Never had a problem using it.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.