
Accurate Carrier-Based Shipping Cost Calculator Guide
Shipping costs are automatically calculated based on carrier rates, package dimensions, and delivery addresses. This service supports major carriers across multiple countries, providing real-time shipping rates at checkout.
Available Countries:
- Australia
- Canada
- France
- Germany
- Netherlands
- New Zealand
- Singapore
- United Kingdom
- United States (excluding Puerto Rico and U.S. Virgin Islands)
Setup Process:
- Add Product Dimensions and Weight
- Enter accurate product measurements including packaging
- Input length, width, height, and weight
- Use the Products panel to identify items with missing information
- Optimize container usage by adjusting dimensions for better fit
- Select Shipping Services
- Choose from available carriers (UPS, FedEx, USPS in US)
- Select desired shipping services
- Enter shipping origin postal code
- Configure Containers
- Choose carrier-provided containers (where available)
- Add custom packaging dimensions
- Ensure container compatibility with carrier requirements
- Set Pricing Margins (Optional)
- Add percentage or fixed amount margins
- Cover packaging and handling costs

Shipping Rate Calculator
Carrier Service Compatibility:
FedEx Services:
- Ground Home Delivery
- Priority Overnight
- Standard Overnight
- 2Day
- Express Saver
- First Overnight
UPS Services:
- Ground
- 3 Day Select
- Next Day Air
- Next Day Air Saver
- 2nd Day Air
USPS Services:
- Priority Mail Express
- Ground Advantage
- Priority Mail

Order Shipping Options
Important Notes:
- Shopping carts limited to 150 items for accurate calculations
- Rates may vary based on packaging configuration and delivery address
- Oversized items may require alternative shipping methods
- All carrier integrations subject to respective privacy policies and user agreements
- International services may require custom container specifications
For oversized shipments or items exceeding carrier limits, consider using weight-based or flat-rate shipping options instead of calculated rates.
Related Articles

How to Manage Squarespace Payments Settings and Account Details
