Smartick Try it for free! Abrir el Menú Móvil Try it for free!
Accelerate your child’s learning
Smartick is a fun way to learn math!


Dimensions: Length, Width, and Height of an Object

In today’s entry, we’re going to talk about length, width, and height as tools to find the dimensions of an object.

Length is a linear measurement, which means we can only use it to measure the distance separating two points.

In this case, we’ve measured the length between the tip of the cockpit and the back of the last coach.


However, the objects we use every day are not straight lines, so we can’t measure them in the same way. We need to use several different measurements to work out their dimensions.

For example, if we want to work out the dimensions of the sheet of paper inside this envelope, we need to measure two things: length and height.

We’ve taken two measurements from this envelope: length 16 cm and height 8 cm.


Two measurements are still not enough for the majority of the objects around us, because they are three-dimensional bodies. That means that we need three measurements, length, width, and height.

We’ve taken three measurements from this box: length 20 cm, width 10 cm, and height 15 cm.


Length, width, and height are measurements that allow us to indicate the volume of geometric bodies. The length (20 cm) and the width (10 cm) correspond to the horizontal dimension. On the other hand, the height (15 cm) refers to the vertical dimension.

We usually express these dimensions by writing them out separated by a multiplication sign. Therefore, when we go to buy a piece of furniture and we want to know its measurements, we can see the following on the box:

170 in (height) x 60 in (width) x 45 in (length)

I hope this entry has helped you learn how to measure the dimensions of objects in the world around you.

Don’t forget that you can register free with Smartick to do exercises involving units of measurement, how find LCM amongst many other things!

Learn More:

Fun is our brain’s favorite way of learning
Diane Ackerman
Smartick is a fun way to learn math
  • 15 fun minutes a day
  • Adapts to your child’s level
  • Millions of students since 2009
Share on FacebookTweet about this on TwitterShare on LinkedIn

Add a new public comment to the blog:

The comments that you write here are moderated and can be seen by other users.
For private inquiries please write to [email protected]

Your personal details will not be shown publicly.

I have read and accepted the Privacy and Cookies Policy


  • Emma SmithFeb 28 2024, 4:33 AM


  • Yakub. DawudSep 04 2023, 5:42 PM

    Very interesting.

  • Kevin MeloAug 29 2021, 6:40 PM

    I’m confused in your example you put HxWxL as the usual way to express measuments, but if I go on a e-commerce website it’s usually listed as the opposite way round LxWxH. Are both forms used?

    • Kevin MeloAug 30 2021, 2:56 AM

      Nevermind. I just got confused over merchants changing the order. You can delete my replies.

    • Phindulo SitholeFeb 20 2022, 2:36 PM

      Smartick helped me a lot

    • FipacumMar 02 2024, 3:32 PM


  • Jake AmbroseFeb 23 2021, 11:30 AM

    this helped so much thx

  • ShreenishaFeb 18 2021, 8:36 PM

    This has helped me a lot in exam time. Thanks ✍️🙏👍👍👍

  • Fatima CeesayMar 31 2020, 12:07 PM

    This helped me with my work thanks a lot 😍

  • annNov 06 2019, 6:24 PM

    Sorry for nit-picking ))) two typos that really confused my 6 yo son.

    1) “Length, width, and height are adjectives”??
    nouns maybe? For kids who just starting to identify parts of speech as part of their basic grammar curriculum, its really confusing,

    2) “For example, if we want to work out the dimensions of the sheet of paper inside this envelope, we need to measure two longitudes: the height??? (length you mean, since you are about to introduce height only later on referring to 3-d shapes measurements vs. 2-d.) …

    and yet next sentence we are back to length

    “We’ve taken two measurements from this envelope: length 16 cm and width 8 cm”

    • SmartickNov 08 2019, 3:57 AM

      Hi Ann!

      Thank you so much for your comment and keen eye.
      We have edited the post and hope that your little one finds it easier to understand. 🙂

  • MiaSep 02 2019, 4:25 AM

    agree much

  • Patricia HendricksAug 25 2019, 6:37 AM

    Need more exercises for measurement.

  • Oscar Javier MurilloJun 16 2019, 2:33 PM

    I like this site

    • Chisom Mikel ObiNov 12 2020, 11:10 AM

      Very useful site, thanks.

  • PrashantMay 15 2019, 1:26 AM

    Very useful to kids and adults also

  • RAMACHANDRANDec 28 2018, 4:05 AM

    very useful to kids and help to refresh the basics for adults like me

  • James BellMay 15 2018, 5:25 PM

    This really helped me

  • Hezekiah Allen-Lee-GaryApr 05 2018, 10:48 AM

    This website really helped me understand length, width, and height now i know thank you very much and its developers