How to Measure Lawn Mower Deck Size

Do you want to make sure your lawn mower is cutting grass evenly, reducing the potential for clumps and bare spots? You must know how to measure lawn mower deck size. The best way to achieve this is by knowing the size of your lawn mower deck. 

How to Measure Lawn Mower Deck Size

Measuring the deck size accurately helps you buy parts such as blades or belts that fit properly, improving the overall performance and longevity of the machine. So how do you measure a lawnmower deck? 

In this blog post we’ll walk through all the steps needed to quickly and easily measure your grass cutter’s deck size – so grab something to write with because there’s important information coming up!

Tools You Will Need

  • Measuring Tape
  • Pen & Paper

6 Steps Guide on How to Measure Lawn Mower Deck Size

Step 1: Measure from Edge to Edge

For those in the market for a lawn mower, measuring the proper size of your mower’s deck is key to achieving beautiful-looking grass. Many lawnmowers feature decks with various widths and shapes, so knowing what size you need before shopping can save time and energy. 

 To Take Measurements From One Edge

The best way to measure a deck size is to take measurements from one edge of the deck opening to another. This gives you an exact measurement of the area and will help ensure you find the right fit for your lawn. 

Additionally, when choosing a lawnmower width or shape, there are other factors involved such as whether the lawn has elevation changes or how much maneuverability is needed in tight spaces. Knowing these details while shopping will provide more options to consider when selecting a new mower.

Step 2: Measure from Corner to Corner

Measuring the size of a lawn mower deck accurately is an important step for purchasing the right mower for your needs. To ensure you buy the correct size, it’s important to know how to measure from corner to corner. Begin by taking a measuring tape and measuring from one outer corner of the deck to the other diagonal corner. 

Make sure you record this measurement in both inches and centimeters. A larger deck allows for better coverage, increased cutting capacity, and fewer trips up and down your lawn. Knowing the exact size will help you make an informed decision on what type of mower is best for you.

Step 3: Measure from Side to Side

The easiest way to measure the size of your lawn mower deck quickly and accurately is to use a tape measure from side to side. Determine the measurement exactly by measuring at two different points on each side; this will give you the width of the deck. 

Once you have these measurements, add them together. The result will be the total width of your mower deck. This gives you an exact measurement that helps ensure you get the right-sized replacement parts or mower accessories you need. Measuring from side to side is a quick and easy process that can save you time and money in the long run.

Step 4: Record Your Measurements

Measuring the size of your lawn mower deck can be a straightforward process – all you need to do is record your measurements. Taking out a measuring tape, measure the length and width of the bottom of your lawn mower deck. 

Taking Out a Measuring Tape

It may take some time to maneuver around the mower so that you can get accurate measurements, but recording them carefully will save you time and hassle when shopping for parts or new blades. 

Furthermore, having exact sizing information on hand can make it easier to get expert advice from repair shops or find suitable replacement parts quickly. Knowing the exact size of your lawn mower’s deck before starting any project related to your mower will ensure smoother repairs or modifications in the long run.

Step 5: Compare Your Measurements

Comparing your measurements to the size of a lawn mower deck when shopping for one can be important in making sure it will fit well in your yard. Measure the area where you plan to store and use the lawn mower to ensure that it will be an appropriate size. 

Generally, a mower deck is between 28 and 36 inches from one side to the other, so measure twice before you buy.

Consider getting something larger if you have a lot of grass or tight turns around landscaping in your yard. Additionally, some models come with adjustable cutting widths that could allow for as much as 50 inches across; so make sure to check for those options too.

Step 6: Use your Results

Measuring your lawn mower’s deck size is an important step in using it effectively. Using the right number and type of results will help you determine the best size deck for your mower. Understanding how much area you are trying to cut and the terrain you are traversing is key to knowing what size deck you need. 

The resulting measurements can be used for comparison when researching mowers or determining if any adjustments are necessary for existing models. 

Attachments Like Cutting Decks

Knowing this information also helps avoid compatibility issues with attachments like cutting decks, blades, snow throwers, and aerators. Before taking action, use your results to properly equip yourself with the best lawn mower deck size for the job at hand!

Now that you have the measurements from each step, it’s time to add them all up and find out the total size of your lawn mower deck. Add the three measurements together for a final deck size number and make sure to keep it handy for future reference or when shopping for parts like blades or belts. 

That’s it!

You have now successfully measured your lawn mower deck size and can get to work on improving the performance of your machine. Happy grass-cutting!

Tips to Measure Lawn Mower Deck Size

  1. Before you measure your lawn mower deck size, it is important to know what the measurements will be used for. The most common use for lawn mower deck size measurements is to determine the best blade length for your mower. Blade length is typically measured in inches and is determined by the width of the cutting deck on your mower.
  2. To measure your lawn mower deck size, you will need a tape measure and a level surface on which to measure. Start by measuring the width of the cutting deck at its widest point. Next, measure the length of the cutting deck from the front of the mower to the back. Finally, measure the height of the cutting deck from the ground to the top of the deck.
  3. Once you have all of your measurements, you can use them to determine the best blade length for your lawn mower. For most lawnmowers, a blade length of 16-18 inches is ideal. However, if you have a very large or very small lawn, you may need a different size blade.
  4. It is also important to consider the type of grass you have when selecting a blade length. If you have very thick or coarse grass, you will need a longer blade to cut it effectively. Conversely, if you have very fine or delicate grass, you will need a shorter blade so as not to damage it.
  5. In general, it is best to err on the side of a longer blade when choosing a blade length for your lawn mower. This is because a longer blade will be able to cut through thicker grass more easily than a shorter blade. Additionally, a longer blade will leave your lawn looking neater and more manicured than a shorter blade.
  6. Another factor to consider when choosing a blade length is how often you plan to use your lawn mower. If you only plan to use your mower occasionally, then a shorter blade may be sufficient. However, if you plan to use your mower frequently, then a longer blade will be necessary to keep your lawn looking its best.
  7. Finally, it is important to make sure that you get the right size blades for your particular model of lawn mower. While most blades are universal and will fit on any model of mower, there are some exceptions. Therefore, it is always best to check with your manufacturer or dealer before purchasing blades for your lawn mower.
Choosing a Blade Length

How To Accurately Measure Your Lawn Mower Deck Size?

Knowing the exact size of your lawn mower deck can be essential information to have when looking for a new mower or when conducting maintenance. There is an easy and accurate way you can measure your current mower’s deck size with just a few simple steps. 

First, make sure that the mower is turned off and expect it to be slightly smaller than the actual size due to wear against the ground. Start by measuring from the tip of the blade on one side across to the tip of the blade on the opposite side. 

This will give you the width of your mower deck and then simply repeat this process for length by measuring from one side of the discharge chute to the other at its longest point. With those two measurements, you now have an accurate measurement of your lawnmower deck’s size!

How to Avoid Compatibility Issues When Replacing Blades on Your Lawn Mower?

Before replacing blades on your lawn mower, it is important to make sure that the new blades are compatible to prevent further issues. Many lawnmowers require specific blade sizes, measurements, and designs. To discover the right Compatibility for your lawn mower, check your existing blades first. 

Require Specific Blade Sizes

Measure the size and note the design of their shape before looking for a replacement pair of blades. Otherwise, you may end up with mismatched blades that won’t work properly in your machine.

Additionally, look out for functional details such as right-hand and left-hand rotation specifications when selecting a new set of blades as some mowers have specific rotation designs as well. 

By first understanding your mower’s blade compatibility requirements, you will be able to easily find an appropriate match without too much trouble or risk of compatibility issues.


Measuring the size of your lawn mower deck is a vital step in purchasing a new one. You should carefully determine how to measure lawn mower deck size. 

There are a few different ways that you can measure the size of your deck, and it is important to make sure that you have an accurate measurement before ordering a new lawn mower. With the right measurements, you will be able to find the perfect lawn mower for your yard.

Leave a Comment