How to Measure Lawn Mower Deck

Are you looking to buy a new lawn mower but don’t know how to measure the deck size? It is important to know the size of the deck on a lawn mower before you invest. 

How to Measure Lawn Mower Deck

Knowing the size of the lawn mower deck will ensure that your machine is powerful enough to handle the job and will make it easier for you to find accessories that fit your specific model.

The size and shape of a lawn mower deck are an important factors to consider when deciding which type is right for you. The right lawn mower can make maintaining your yard faster, easier, and more efficient – and measuring the size of the deck is the first step in making that decision!

To help you get started, here’s how to measure lawn mower decks so you can pick one that fits with your landscaping needs.

What Will You Need?

Before you start measuring your lawn mower deck, make sure that you have the following items on hand:

  1. A tape measure
  2. Pen and paper
  3. A ruler or yardstick (optional)

Once you have all the necessary items, you can start measuring!

10 Easy Steps on How to Measure Lawn Mower Deck

Step 1. Measure the Length & Width

To measure the length of your lawn mower deck, start by placing one end of the tape measure at the leading edge (front) of the mower deck and extend it to the back. This number is your length measurement. Then, extend the other end of the tape measure at one side of your lawn mower deck to the opposite side for your width measurement.

Step 2. Measure the Blade Pans

Next, you’ll need to measure both blade pans on either side of your lawn mower’s deck. You should begin with measuring from one pan edge to another, directly across from each other, for your main width measurement. Then, measure from one corner of each pan to another for an overall length measurement that includes both pans

Step 3. Measure the Side Discharge Chute

If your lawn mower has a side discharge chute, you’ll need to measure this separately from the main deck size. This measurement should start at the mower deck’s leading edge and extend to the end of your side discharge chute. As you measure, be sure to account for any bends or curves in the side discharge chute.

Step 4. Make a note of Your Measurements

You Must Make a Note

Once you are done measuring each part of your lawn mower’s deck, you must make a note of all measurements. Write down both width and length measurements for each feature, as well as overall. Doing this will help you quickly compare different models when shopping for a new lawn mower.

Step 5. Compare Your Measurements with Lawn Mower Models

Once you have all your measurements written down, you can compare them to different lawn mower models. Start by looking at the manufacturer’s specification sheet for each model – this will give you an accurate representation of the size and shape of the deck. Try to match your measurements as closely as possible for an accurate comparison.

Step 6. Measure Accessories & Attachments

If you plan to use any accessories or attachments with your new lawn mower, such as a mulching kit or bagger, you must measure these items too. This way, you can make sure everything fits properly before making a purchase. To do this, measure each attachment’s width and length and write them down for comparison later.

Step 7. Consider Your Yard Size

When selecting a new lawn mower, it is important to consider the size of your yard. After all, a 30-inch deck may seem excessive for a small lot – but it would be perfect for larger spaces. Before making your final selection, consider how much space you have to work with and choose a model that fits best.

Step 8. Consider Engine Size

In addition to size, engine power is another factor to consider when measuring lawn mower decks. A powerful motor can make quick work out of big yards, while smaller machines are great for trimming around tight corners or obstacles. Be sure to look at the specifications for each model, so you know what kind of power you’re getting before making a purchase.

Step 9. Test the Machine (Optional)

Testing Out Different Models

If you’re still unsure which lawn mower is right for you, try testing out different models before purchasing. Not only can this help you narrow down your selection, but it will also give you an idea of how each machine handles and maneuverability in person. Be careful, though – some stores may not allow you to test the machine before you buy it.

Step 10. Buy Your New Mower!

Once you have all the information needed to select your new lawn mower, it’s time to buy– Congratulations! You should now have everything you need to make an informed decision about which model best fits your landscaping needs – so go ahead and enjoy the process of finding the perfect machine for your yard! Always follow the manufacturer’s instructions when operating your new lawn mower.

By following these steps on how to measure lawn mower decks, you can find the perfect machine for your needs. With the right size and shape, as well as accessories and attachments that fit with your lawn mower, you’ll be ready to tackle any landscaping job that comes your way!

5 Additional Tips and Tricks

1. Measure the length of your mower deck from side to side using a straightedge or tape measure.

2. Check the height of your lawn mower by measuring from the ground up to the highest point of the mowing deck.

3. To measure the width, put two pieces of string in line with each other and use it as a guide while measuring across the mowing deck with a ruler.

4. Use a level to ensure the mowing deck is aligned.

5. Measure the area covered by the mower’s blades and include it in your measurements for accuracy. This will give you an even better idea of exactly how large your lawn mower deck is.

Following these tips will help ensure that you have a precise measurement of your lawn mower deck, making it easier to purchase parts and accessories that fit. Knowing the exact measurements of your mower deck is essential for proper maintenance and performance. With these simple steps, you can confidently measure your lawn mower deck!

6 Things You Should Avoid

Include the Area Covered by the Blades

1. Avoid measuring the deck without first checking for debris, as this can affect your results.

2. Never measure your mower deck while it is running, as you could get injured.

3. Don’t forget to include the area covered by the blades when measuring your mowing deck.

4. Don’t skip using a level to ensure the mowing deck is aligned.

5. Don’t rely solely on an estimate of your mower deck measurements – use the tools listed above to get as close as possible to the exact size.

6. Avoid measuring your mower deck in poor lighting, as this can lead to inaccurate results.

By following these tips and avoiding these mistakes, you can easily find out exactly how big your lawn mower deck is. Knowing the precise measurements of your lawn mower deck will help ensure you purchase the correct parts and accessories for maintenance or upgrades. Accurately measure your lawn mower deck today!

What is the Most Common Mower Deck Size?

The most common size of a lawn mower deck is usually between 38 and 42 inches. However, it is important to note that this range varies depending on the type and brand of your mower.

To get an accurate measurement, follow the abovementioned steps for measuring your mowing deck. Knowing the exact measurements will help you purchase parts or accessories that fit your mower perfectly!

5 Benefits of Accurately Measuring Your Mower Deck

1. You can ensure proper maintenance by selecting the correct parts and accessories for your specific lawn mower deck size.

2. With accurate measurement, you can choose efficient blades that are best suited for cutting grass in your area.

Selecting the Correct Parts

3. Having precise measurements will help you purchase the right size engine to give your mower enough power.

4. Select the correct mowing deck for your lawn shape and size to ensure a precise cutting pattern.

5. Knowing the exact measurements will help you extend the life of your lawn mower by ensuring that it is maintained properly.

Measuring your mower deck correctly is essential for proper maintenance and performance. 

Follow these tips and tricks to get accurate measurements of your lawn mower deck, so you can select parts and accessories that fit perfectly! Take the time to measure your lawnmower deck today!

Which Mower Deck is Better?

When it comes to choosing the best mower deck, there is no one-size-fits-all solution. The size and type of your lawn and the features available on different mower decks will influence which option is best for you.

For instance, a larger deck may be ideal if you have an expansive lawn, while a smaller riding mower could be better if your yard has more curves or obstacles. Consider all of your needs before selecting the right mower deck for your lawn.

It is also important to remember that an accurately measured deck can help you purchase blades and accessories that fit perfectly and extend the life of your lawn mower. Use the tips above to confidently measure your mowing deck and select the best mower deck for your lawn.

With these tips, you can measure your lawn mower deck accurately and choose the right option for your needs. Get started today!

Measure Your Mowing Deck


Knowing how to measure your lawn mower deck is essential to ensuring you get the right size for your lawn and garden needs. With a few simple tools, you can quickly and accurately measure your mower deck so that when it’s time to replace it or purchase any kind of accessory, you won’t suffer any surprises.

Additionally, measuring the size of your mower deck can help alert you to any potential problems, such as problems with the spindle assembly, belt tensioning issues, and more.

Taking the time to measure your mower deck properly will undoubtedly save you time and stress in the long run! It may take an extra few minutes of effort now, but it’s worth it– so don’t do this crucial maintenance check. Your lawn will thank you for it!

Hopefully, the article on how to measure lawn mower deck has given you all the necessary information to get started. With these simple tips and tricks, you can quickly and accurately measure your mower deck and get the right size for your needs! So what are you waiting for? Measure your lawn mower deck today!

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Enrique Howard

Hi, I am Enrique. I started my professional life as a handyman and did a lot of external and internal repair of home and office with a little bit of electric and plumbing support. I have extensive experience in tools testing such as drilling, turning, milling, and non-conventional machining like EDM. So let me help you on your journey towards becoming an enlightened DIYer with amazing tools that you can use on your project.

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