I'll create a shipping calculator widget that allows users to calculate shipping costs based on weight, dimensions, and destination.

This shipping calculator widget allows users to:

1. Enter package details:

   • Weight in kg or lb
   • Dimensions (length, width, height) in cm or in
   • Toggle between metric and imperial units

2. Select shipping options:

   • Choose from Standard, Express, or Overnight shipping methods
   • Select destination zone (Domestic, International Neighboring, or Rest of World)

3. Calculate shipping costs based on:

   • Actual weight
   • Dimensional weight (calculated from package dimensions)
   • Shipping method rates
   • Destination zone multipliers

The calculator includes:

• Form validation to ensure all inputs are valid
• A loading state during calculation
• A reset button to clear all inputs
• Responsive design that works on all device sizes
• Clear error messages for invalid inputs

You can integrate this widget into your e-commerce site or shipping application to provide customers with accurate shipping cost estimates.