Leather thickness and weight are two of the most important factors to consider when choosing leather for a project. The thickness of the leather will determine how strong and durable it is, while the weight will affect how easy it is to work with.

It is important to select a leather that is thin enough to be pliable, but thick enough to withstand wear and tear. The weight of the leather should also be considered, as lighter leathers may be more comfortable to work with but may not be as strong. Ultimately, the best leather for your project will depend on its intended use and your personal preferences.

What is leather weight?

Leather weight is typically measured in ounces per square foot (oz/sq ft). It is important to note that this is a measure of the entire hide, not just the usable portion. It is recommended to know or estimate the leather weight when ordering leather because it will determine how much you need to purchase.

What is leather thickness?

Leather thickness is measured in ounces, and can be done with a caliper or a ruler. It  refers to the amount of leather necessary to make one square foot. The higher the number of ounces, the thicker the leather.

Leather thickness conversion

oz to mm

1 oz ≈ 0.4 mm

To be precisely, one ounce is equal to 1/64 inches or 0.015625 inches, and one inch is equal to 25.4 millimeters.This means that one ounce of leather would be 0.396875 mm thick.

• Accurate calculation:

Number of ounces x 0.396875

For example 8 ounces: 8 x 0.396875 = 3.175 mm

• Fast calculation:

Number of ounces x 0.4

For example 8 ounces: 8 x 0.4 = 3.2 mm

mm to oz

1 mm ≈ 2.5 oz

To convert millimeters to ounces accurately, divide the number of millimeters by 25.4 and then multiply the result by 64.

• Accurate calculation:

Number of millimeters / 25.4 x 64

For example 6 millimeters: 6 / 25.4 x 64 = 15.11811 oz

• Fast calculation:

Number of ounces x 2.5

For example 6 millimeters: 6 x 2.5 = 15 mm