How much space does a garbage disposal take?(47 models compared)

How much space do you need to install a garbage disposal?

When buying a garbage disposal one of the main concerns is whether there is enough space under the sink to install it. For a vast majority, this concern is misplaced.

The average space required to install a garbage disposal is 18 inches in height and 11 inches in width. I reached this estimate by calculating the average width and height of 47 garbage disposals.

However, the heights of some disposal units vary greatly. So it is better to consider the table below to find the right space requirements.

Space needed to install popular garbage disposals

In order to calculate the space required to install a garbage disposal, we need to have the dimensions of the unit as well as some extra space at the bottom and sides. It is recommended to leave at least 5 inches of space under the disposal unit for easy installation, troubleshooting, and removal. Also, a 3-inch space is recommended to be left on one of the sides to install the drain elbow.

  • Minimum height required = Height of the garbage disposal + 5 inches
  • Minimum width required = Maximum width of the garbage disposal + 3 inches

Here is is a list of 47 popular garbage disposals and the space required under the sink to install each of them;

BrandGarbage disposal modelHeightMaximum widthPowerSpace needed for installation
InSinkEratorEvolution Excel13 inch9 inch1 HP18 x 12 x 12 inches
InSinkEratorEvolution Pro 1100XL13 inch9 inch1.1 HP18 x 12 x 12 inches
InSinkEratorEvolution Supreme SS13 inch9 inch1 HP18 x 12 x 12 inches
InSinkEratorEvolution Prestige13 inch9 inch1 HP18 x 12 x 12 inches
InSinkEratorEvolution Esteem Plus12.25 inch8.75 inch1 HP17.25 x 11.75 x 11.75 inches
InSinkEratorBadger 1 HP12.625 inch6.75 inch1 HP17.625 x 9.75 x 9.75 inches
InSinkEratorEvolution Pro 1000LP11.33 inch10 inch1 HP16.4 x 13 x 13 inches
Waste King998016 inch8.5 inch1 HP21 x 11.5 x 11.5 inches
Waste KingL-800016 inch8.5 inch1 HP21 x 11.5 x 11.5 inches
Waste KingL-8000TC18.15 inch8.5 inch1 HP23.15 x 11.5 x 11.5 inches
MoenGX100C16 inch7.5 inch1 HP21 x 10.5 x 10.5 inches
MoenEXL100C16 inch8.375 inch1 HP21 x 13.375 x 13.375 inches
InSinkEratorEvolution Cover Control Plus16.25 inch10 inch3/4 HP21.25 x 13 x 13 inches
InSinkEratorEvolution Select Plus12.25 inch8.75 inch3/4 HP17.25 x 11.75 x 11.75 inches
InSinkEratorEvergrind E40412.625 inch6.75 inch3/4 HP17.625 x 9.75 x 9.75 inches
InSinkEratorEvolution Essential XTR12.25 inch8.75 inch3/4 HP17.25. x11.75 x 11.75 inches
InSinkEratorBadger 15SS12.63 inch6.75 inch3/4 HP17.63 x 9.75. x9.75 inches
InSinkEratorBadger 5XP12.625 inch6.31 inch3/4 HP17.625 x 9.31 x 9.31 inches
InSinkEratorEvolution Compact12.25 inch8.75 inch3/4 HP17.25 x 11.75 x 11.75 inches
InSinkEratorEvolution Space Saver XP12.25 inch8.75 inch3/4 HP17.25 x 11.75 x 11.75 inches
InSinkEratorEvolution Septic Assist12.625 inch13 inch3/4 HP17.625 x 16 x 16 inches
InSinkEratorEvolution Pro 75012.25 inch8.75 inch3/4 HP17.25 x 11.75 x 11.75 inches
InSinkEratorBadger 90012.625 inch6.75 inch3/4 HP17.625 x 9.75 x 9.75 inches
Waste King9900TC16.5 inch8.5 inch3/4 HP21.5 x 11.5 x 11.5 inches
Waste King995014.5 inch8.5 inch3/4 HP19.5 x 11.5 x 11.5 inches
Waste KingL-320013.75 inch7.75 inch3/4 HP18.75 x 10.75 x 10.75 inches
Waste KingL-5000TC16.75 inch8.5 inch3/4 HP21.75 x 11.5 x 11.5 inches
MoenGT7513.375 inch6.5 inch3/4 HP18.375 x 9.5 x 9.5 inches
Waste KingL-330014.5 inch8.5 inch3/4 HP19.5 x 11.5 x 11.5 inches
MoenGXS75C13.375 inch7.5 inch3/4 HP18.375 x 10.5 x 10×5 inches
MoenGXB75C15.625 inch7.5 inch3/4 HP20.625 x 10.5 x 10×5 inches
MoenGX75C14.375 inch7.5 inch3/4 HP19.375 x 10.5 x 10×5 inches
MoenEX75C13.375 inch7.5 inch3/4 HP18.375 x 10.5 x 10×5 inches
InSinkEratorBadger 511.5 inch6.625 inch1/2 HP16.5 x 9.625 x9.625 inches
InSinkEratorEvergrind 20211.5 inch6.625 inch1/2 HP16.5 x 9.625 x9.625 inches
Waste King993013.5 inch6.75 inch1/2 HP18.5 x 9.75 x 9.75 inches
Waste KingL-100112.75 inch5.25 inch1/2 HP17.75 x 8.25 x 8.25 inches
Waste King992013.5 inch7.75 inch1/2 HP18.5 x 10.75 x 10.75 inches
Waste KingL-260013.5 inch6.75 inch1/2 HP18.5 x 9.75 x 9.75 inches
MoenGXP50C13.375 inch5.375 inch1/2 HP18.375 x 8.375 x 8.375 inches
MoenGX50C13.375 inch7.5 inch1/2 HP18.375 x 10.5 x 10.5 inches
MoenGT50C13.375 inch5.375 inch1/2 HP18.375 x 8.375 x 8.375 inches
MoenEX50C13.375 inch7.5 inch1/2 HP18.375 x 10.5 x 10.5 inches
InSinkEratorBadger 111.5 inch6.625 inch1/3 HP16.5 x 9.625 x 9.625 inches
Waste KingL-11112.75 inch5.25 inch1/3 HP17.75 x 8.25 x 8.25 inches
MoenGXP33C13.375 inch5.375 inch1/3 HP18.375 x 8.375 x 8.375 inches
MoenGT33C13.375 inch5.375 inch1/3 HP18.375 x 8.375 x 8.375 inches

Sources: The dimensions given above are taken from the websites of the corresponding brands.

An analysis of the heights of different categories of garbage disposals

Average height of a garbage disposal

I calculated the average height of a garage disposal using the dimensions from the above table. Here is it;

  • Total of all heights = 637.93
  • No. of models considered = 47

The average height of a garbage disposal = 637.93/47=13.58 inch

I also calculated the average width;

  • Total of all widths = 362.56
  • No. of models considered = 47

The average width of a garbage disposal = 362.56/47=7.714 inch

So to install a garbage disposal you must have a space that is at least 18 inches high and 11 inches wide.

But to be honest I believe using this average of dimensions makes the data a little skewed. Here is an example; As you can see from the above table, the heights of 1 HP garbage disposals by InSinkErator are 13 inches or below. For Waste King and Moen units, it is 16 inches with the exception of the model L-8000TC which is 18.15 inches high. So if you have only 18 inches space under the sink, installing a Waste King model may not work.

Which is the shortest garbage disposal?

The shortest garbage disposal is InSinkErator Evolution Pro 1000LP. It has only a height of 11.33 inches. But it is wider with 10 inches in diameter. This shape allows this disposal unit not only to be compact but also to manage large quantities of food wastes at a time.

Which is the thinnest garbage disposal

Waste King L-111 is the thinnest garbage disposal. It is only 5.25 inches wide.

It is powered by a 1/3 HP motor running at 1900 RPM. If you are interested in knowing more about this unit feel free to check my detailed review.

If you have any questions, feel free to let me know through the comments section.

Charles John

A few years back I bought a garbage disposal for the first time in my life. And the buying experience wasn't good. There were lots of models in the market, and I was not sure about which one to buy. They all looked the same to me. So once I went through the experience I started this blog to randomly write things about garbage disposals. Then I got really interested in the subject and started to write comparisons of very similar garbage disposals with each other. A lot of my readers find them very useful in making the right buying choice. I hope it helps you too.

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