Doyle Log Scale: How To Use & Where To Buy (With Video)

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Doyle Log Scale

Are you going to be buying or selling logs at some point in the future? If the answer is yes, there is a pretty good chance that you’re going to run into the Doyle log scale. This scale is commonly used to determine how much a specific log is going to sell for.

In fact, this is the standard for buying and selling hardwood logs. The only problem is that the scale is not perfect. There is a real possibility that it is going to provide the user with the wrong numbers. Below, you’re going to learn more about this scale and how it differs from the international scale.

If you’re looking to purchase a Doyle log scale, look no further Amazon, here is the link to it, Doyle Log Scale.

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What Is The Doyle Scale

First and foremost, you should learn more about the Doyle scale. Again, this scale is utilized to determine how much logs are going to be sold for. It is commonly used by people who buy and sell logs. In general, the scale is going to underestimate the volume of smaller logs.

Alternatively, it will actually overestimate logs that are larger. If you’re dealing with a smaller log, there is a good chance that the penalty will be greater. While the scale is not perfect, it is still pretty accurate.

If you’re going to be buying and selling logs, there is a good chance that you’ll be dealing with the Doyle scale at some point or another.

Log Rule History

Over the years, the logging industry has gone through an abundance of changes. Ever since the first sawmill was constructed in America, more than one hundred rules have been created. They have used an abundance of methods. Nevertheless, a lot of these rules have died off.

Only have handful have managed to withstand the test of time. The Doyle log rule is one of the longest lasting. It is commonly used alongside the Scribner log rule and the international log rule. The Doyle log rule was developed sometime around 1825. While the Doyle rule is not the most reliable, it is still one of the most popular.

Instead, it is the international rule that is considered the most consistent.

Doyle Scale Vs International Scale

The Doyle scale has been around for an incredibly long period of time. In fact, it was developed around 1825. It is a type of mathematical formula commonly utilized throughout the United States. The problem with the Doyle scale is the fact that it is inconsistent a lot of the time.

As mentioned above, this specific scale is going to overestimate bigger logs and underestimate smaller logs. If you’re going to be selling timber, it is vital to be aware of the fact that the value of smaller logs is going to be underestimated with this scale.

The international scale is much different. It was developed in 1906. This scale centers around a mathematical formula that is reasonably sound. If you’re looking for the most accurate scale of all, you will definitely want to stick with the international scale.

This one tends to be the most consistent. On top of that, it makes it possible to use deductions for shrinkage and that can make the end results far more accurate.

There is also the Scribner log rule. It was developed in 1846 and remains a good representation of the diagram rule. This scale isn’t nearly as reliable as the international scale. Nevertheless, some people still prefer using it.

How To Use Folding Doyle Log Scale Ruler

If you want to make the process as quick and simple as possible, you will definitely want to take advantage of the Doyle log scale ruler. This is a mechanical device that is often utilized by lumber cutters. This type of ruler will be used to measure the diameter and height of the log before it is cut.

Once you’ve used the ruler, you should be able to determine how many pieces of wood can be obtained from the log in question. Remember that the scale is not completely accurate. Therefore, the answer that you receive is only an estimate. You may get fewer or more logs in the end.

Using the ruler couldn’t be easier. You just need to place it against the trunk of the tree. This should be done four feet from the ground. Then, you should adjust the orientation from left to right. Once you’ve taken the measurement, you will need to use the chart on the rule to find out the end results. After that, you should be well on your way. Take your time and make sure you work carefully to get accurate results.

The Best Doyle Ruler

The DayMark Log Ruler is really one of the best of the bunch. This specific Doyle ruler is manufactured in the United States. This ensures that the quality is top notch and that you’re going to get the most accurate results possible. This is a compact and lightweight rule.

When compacted, it is going to measure in at .7 by 1.3 by 8 inches. This ensures that you’ll be able to stick the ruler in your pocket and you’ll be good to go. On top of that, it weighs just 3.2 ounces. You can guarantee that it is not going to weigh you down. You’ll be able to take this ruler with you pretty much everywhere you go.

If you’re looking for a simple Doyle ruler that will provide you with pretty accurate results, you’ll definitely want to use the DayMark Log Rule Doyle Ruler. It will not let you down and the price is pretty reasonable.

It can be found on Amazon, Here is the link to it, Doyle Log Scale.


At the end of the day, there are plenty of log rules out there. And of course, there are plenty of reasons to stick with the Doyle rule. It might not be the most consistent, but it is still very reliable. Plus, it is pretty easy to pull off.

Even if you’re not a rocket scientist, you will be able to figure it out. If you intend to sell or buy logs at some point in the future, it is really in your best interest to learn as much as you can about this rule.

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