# Dimensional Weight Calculator

URL: https://speedycalculator.com/calculators/other/dimensional-weight/
Last updated: 2026-10-25

> The dimensional weight calculator finds the volumetric weight of a parcel used by couriers to charge for bulky but light packages, and the billable weight.

## Inputs

- Length (cm)
- Width (cm)
- Height (cm)
- Actual weight (kg, lb, g, oz, st)
- Carrier divisor

## Results

- Dimensional weight
- Billable weight

## Formula

```
DIM weight (kg) = L × W × H (cm) ÷ divisor (often 5000)
DIM weight (lb) = L × W × H (in) ÷ 139
```

## Explanation

Couriers bill the greater of actual weight and dimensional weight, so oversized boxes cost more.

### How to use the Dimensional Weight Calculator

- **Length**
- **Width**
- **Height**
- **Actual weight**
- **Carrier divisor**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Multiply the box dimensions and divide by the carrier’s divisor.

### Inputs explained

FieldWhat to enterLengthIn cmWidthIn cmHeightIn cmActual weightUnits: kg, lb, g, oz, stCarrier divisorChoose one: 5000 (most express couriers), 6000 (some postal/economy), 4000

### What each result means

- **Dimensional weight** = [Length]×[Width]×[Height]÷[Carrier divisor]
- **Billable weight** = max([Dimensional weight], [Actual weight])

### Example values

How the main result changes when **Length** changes and everything else stays at the example values above:

Length (cm)Billable weight (kg)25637.59501262.515751810024

## Worked example

Inputs — Length: 50 cm; Width: 40 cm; Height: 30 cm; Actual weight: 6 kg; Carrier divisor: 5000 (most express couriers).

Results — Dimensional weight = 12 kg; **Billable weight = 12 kg**.

## FAQ

**How can I reduce dimensional weight?**
Use the smallest box that protects the item.

**Do carriers round up?**
Usually dimensions to the next whole cm or inch and weight to the next 0.5 kg or lb.

**What formula does the Dimensional Weight Calculator use?**
DIM weight (kg) = L × W × H (cm) ÷ divisor (often 5000).