Enter any four of the width, length, thickness, density, and coil weight into the calculator to determine the missing value.

Coil Weight Calculator

Enter any 4 values to calculate the missing one

Coil Weight Formula

The following formula is used to calculate the coil weight (mass) from volume and density:

CW = W \cdot L \cdot T \cdot D

Variables:

  • CW is the coil weight (mass)
  • W is the width of the coil
  • L is the length of the coil
  • T is the thickness of the coil
  • D is the density of the material

To calculate the coil weight, multiply the width, length, and thickness to get the material volume, then multiply by the material density. If W, L, and T are in meters and D is in kg/m³, the result CW is in kilograms. (This calculator converts between common units automatically.)

What is a Coil Weight?

Coil weight (often referred to as coil mass) is the amount of material in a rolled coil, expressed as a weight (commonly treated as mass in industry). This is typically used in the steel and aluminum industries to describe the mass of sheet, strip, or similar material supplied in a coil. The coil weight is determined by the width, thickness, and length of the material in the coil, as well as the density of the material. It is an important factor in the handling, shipping, and processing of the coil.

How to Calculate Coil Weight?

The following steps outline how to calculate the Coil Weight:

  1. Measure the coil material width (W).
  2. Measure the coil material thickness (T).
  3. Determine the total material length in the coil (L).
  4. Look up or measure the material density (D) (for example, carbon steel is commonly approximated as 7,850 kg/m³).
  5. Calculate coil weight (mass) using CW = W × L × T × D, then convert units if needed. (If you need total shipped weight including pallet/core/packaging, add that tare weight separately.)

Example Problem:

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

Width (W) = 1.00 m

Length (L) = 100 m

Thickness (T) = 2.00 mm (0.00200 m)

Density (D) = 7,850 kg/m³

Coil weight: CW = 1.00 × 100 × 0.00200 × 7,850 = 1,570 kg (about 1.57 metric tons).