Ash wood is generally heavier than oak wood.

Ash wood typically has a density ranging from 0.35 to 0.45 grams per cubic centimeter (g/cm³), while oak wood has a density that varies between 0.60 and 0.75 g/cm³. This difference in density is due to the varying composition of the two types of wood. Oak wood contains a higher percentage of lignin, a complex organic polymer that provides structural strength and rigidity, which contributes to its greater weight. Additionally, oak trees are generally larger and older than ash trees, which can also affect the overall weight of the wood.

The density of wood is a critical factor in determining its weight, as it is a measure of the mass of the wood per unit volume. Since oak wood has a higher density, it is heavier than ash wood. This is particularly evident when comparing the weight of similar-sized pieces of the two woods. For example, a 1-inch thick, 1-foot long, and 1-foot wide board of oak wood will weigh approximately 6.5 pounds, whereas the same dimensions of ash wood will weigh around 5.5 pounds. This difference in weight is significant and can impact the performance and application of the wood in various industries, such as construction, furniture making, and sports equipment.