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Log Weight Calculator

Log Weight Calculator

Weight of wood and the wood density chart

The weight of wood mainly depends on three factors: the wood species, the volume of the log, and its moisture content. The wood species tells us the density of the wood. However, the density of the wood varies depending on its moisture content.

The moisture content of wood is the amount of water within the wood. It ranges between 150% or more for fresh wood and as low as 5% for processed and dried wood. For wood, we determine its moisture content by taking the percentage of the water’s weight in freshly-cut wood to the same wood’s oven-dry weight. A 250-kg freshly-cut wood weighing 100 kg after oven-drying would have a moisture content of 150%. The higher the moisture content is, the heavier the wood weighs. In this calculator, we consider the “green” density of wood, which is the density of a piece of freshly cut wood.

The green density varies from tree to tree and does not pertain to a particular moisture content for each tree species. As a reference, you can check the wood density chart below, which is also sometimes called the green log weight chart, for the green density of the most common tree species found on the market today:

Species Density lb/ft³ Species Density lb/ft³
Alder, red 46 Magnolia ev. 59
Apple 55 Maple, red 50
Ash, green 47 Maple, silver 45
Ash, Oregon 48 Maple, sugar 56
Ash, white 48 Oak, black 62
Aspen, quaking 43 Oak, Cali. black 66
Bald cypress 51 Oak, English 52
Basswood 42 Oak, live 76
Beech 54 Oak, pin 64
Birch, paper 50 Oak, post 63
Birch, Yellow 57 Oak, red 63
Butternut 46 Oak, scarlet 64
Cedar, incense 45 Oak, white 62
Cedar, western red 28 Osage orange 62
Cherry, black 45 Pecan 61
Chestnut 55 Persimmon 63
Chinaberry 50 Pine, loblolly 53
Cottonwood 49 Pine, lodgepole 39
Elm, American 54 Pine, longleaf 55
Fir, Douglas 39 Pine, ponderosa 46
Fir, noble 29 Pine, slash 58
Fir, white 47 Pine, sugar 52
Gum, black 45 Pine, white 36
Gum, red 50 Poplar, yellow 38
Hackberry 50 Redwood coastal 50
Hemlock eastern 49 Sassafras 44
Hemlock western 41 Spruce, Red 34
Hickory Shagbark 64 Spruce, Sitka 32
Honey locust 63 Sweetgum 55
Horse chestnut 41 Sycamore 52
Larch 51 Tamarack 47
Locust, black 58 Walnut, black 58
Locust, honey 61 Willow 32

Even though it shows the density, this is also known as the green log weight chart because it instantly shows us the green weight of wood per cubic foot of volume.

Using our log weight calculator

Determining the weight of wood in the shape of a log or board is made easy using our log weight calculator. Here are the instructions on how to use our calculator:

  1. Choose the shape of wood you have – either a log or board.
  2. Select the tree species that you are considering from the drop-down selection in the “Species” field. Choosing a species locks in the density value of your wood. You can view the weight of wood per cubic foot value in our calculator’s advanced mode if you want to check or change it.
  3. Input the dimensions of your wooden log or board. Entering these values automatically finds the volume of the wood. At this time, the weight per piece of log or board will also be already displayed.
  4. If you have multiple wood quantities with the same dimensions, enter their quantity to calculate their total weight.

The importance of knowing how to calculate the weight of a log

As with other materials in construction, knowing the weight of a material aids in logistical considerations and in assessing whether or not equipment can carry the load.

Since we cannot always have a weighing scale around us, knowing how to calculate the weight of a log using the measurements we can find on-site, whether with the help of our wood weight calculator or through manual calculations, can sometimes save the day.

Contact us for a free quote.