Convert leather oz and PCB copper weight to mm, inches, microns, and mils with this converter for thickness in both material types.

Oz to mm Converter

“Oz to mm” usually means thickness, not weight-to-volume. Choose the right context below.

Leather oz ↔ mm
PCB Copper oz ↔ mm
Leather thickness conversion

Leather weight is commonly treated as thickness. This calculator uses the standard approximation of 1 oz ≈ 0.4 mm.

Quick picks
1 oz
2 oz
3 oz
4 oz
5 oz
6 oz
8 oz
10 oz
PCB copper thickness conversion

PCB copper weight is typically expressed as oz/ft². This calculator uses the standard approximation of 1 oz copper ≈ 0.0348 mm ≈ 34.8 µm.

Quick picks
0.5 oz
1 oz
2 oz
3 oz
4 oz

Result

Enter a value, choose the right tab, then click Calculate.

Oz To mm³ Formula

The following formula can be used to convert ounces (oz, av) of mass to cubic millimeters (mm³) of volume for a specific substance, given its density.

V_{mm^3} = (Oz \times 28349.523125) / \rho

Variables:

  • V is the volume in cubic millimeters (mm³)
  • Oz is the mass in ounces (oz, av)
  • ρ is the density of the substance (g/cm³)
Ounces to Cubic Millimetres Conversion Table (density ρ = 1.00 g/cm³)
Ounces (oz, av) Cubic millimetres (mm³)
1/161771.845
⅛3543.690
1/64724.921
¼7087.381
⅓9449.841
⅜10631.071
½14174.762
⅝17718.452
⅔18899.682
¾21262.142
⅞24805.833
128349.523
1¼35436.904
1⅓37799.364
1½42524.285
1¾49611.665
256699.046
2½70873.808
385048.569
4113398.093
* Rounded to 3 decimals. Assumes density ρ = 1.00 g/cm³ (water). Using 1 oz (av) = 28.349523125 g gives 1 oz ≈ 28,349.523 mm³ at ρ = 1.00 g/cm³.

What Is an Oz To mm³ Conversion?

Oz to mm³ is a density-dependent conversion because ounces (oz, av) measure mass, while cubic millimeters (mm³) measure volume. A direct conversion is not possible without knowing the substance’s density (for example, in g/cm³).

How to Calculate Oz To mm³?

The following steps outline how to calculate the volume in cubic millimeters (mm³) using the formula: V(mm³) = (Oz × 28349.523125) / ρ

  1. First, determine the mass in ounces (Oz).
  2. Next, determine the density of the substance (ρ) in g/cm³.
  3. Convert ounces to grams using 1 oz (av) = 28.349523125 g.
  4. Compute the volume in cubic centimeters: V(cm³) = mass(g) / ρ.
  5. Convert cm³ to mm³ by multiplying by 1000 (since 1 cm³ = 1000 mm³).
  6. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

mass in ounces (Oz) = 5

density of the substance (ρ) = 2.5 g/cm³

volume (V) = (5 × 28349.523125) / 2.5 = 56,699.046 mm³