Volumetric weight or mass weight

Hi!

I need a module that can help me with the following, in example:

Product dimensions:
Length: 3.5 cm
Width: 22 cm
Hight: 28 cm
Actual weight: 240 grams

Volumetric weight: (3.5*22*28)/5000 = 431 grams

Correct thing would be to take the 431 grams instead of 240 grams value.

What con you suggest me?

Best wishes.

What you need is not an extension that modifies the product area, but a shipping extension capable of doing volumetric/volume-based calculations. My Formula-Based Shipping extension can do this, so you can create a weight-based rate and a volumetric rate, then take the higher of the two costs (which is exactly like taking the higher of the two weights).

Volumetric rates are just volume-based rates with an additional factor, so you just need to know how to set that up properly. Here's an example where the cost if $5.00 for 0-200 grams, $10.00 for 200-400 grams, $15.00 for 400-600 grams, etc. The volumetric factor is 5 (for grams , which is 5000 for kg), as in your example:

------------------------------------------------------------------------------
CHARGE #1
Title: Weight-Based Rate
Group: A
Charge Type: Weight
Charge Field:
0-200 = 5.00
200-400 = 10.00
400-600 = 15.00
etc.

CHARGE #2
Title: Volume-Based Rate
Group: B
Charge Type: Volume
Charge Field:
0-1000 = 5.00
1000-2000 = 10.00
2000-3000 = 15.00
etc.
------------------------------------------------------------------------------
CHARGE COMBINATION #1
Sort Order: 1
Title Combination: Single Title
Groups Required: (leave blank)
Formula: MAX(A, B)
------------------------------------------------------------------------------