Settings and rate behavior
Updated · SMART Shipping Rates (E-TRADE PARTNER)
SMART settings control general behavior such as weight unit, multiple rates behavior, and rounding. Review settings before testing calculated rates, especially when cart weight, product weight, or several matching rates affect the checkout result.
4.9 · SMART Shipping Rates does this with zones, calculated rates, and delivery customizations.
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Settings do not replace rule conditions. They define how SMART interprets and presents rates across your setup. A small settings mismatch can make a correct-looking rule produce the wrong checkout result.
Key settings
| Setting | What it affects |
|---|---|
| Weight unit | How cart weight and product weight rules are interpreted |
| Multiple rates behavior | What happens when several rates match |
| Rounding | How final calculated prices are rounded |
Multiple rates behavior
When more than one calculated rate matches, SMART settings can control whether checkout shows all rates, the highest rate, the lowest rate, or the cheapest and most expensive rates. Choose the behavior that matches how your store wants customers to compare shipping options.
- Use show all when customers should choose between valid calculated options.
- Use highest when the safest cost should win.
- Use lowest when the cheapest valid calculated option is acceptable.
- Use cheapest and most expensive when you want to show the price range endpoints.
Weight unit
Weight-based rules depend on the selected unit. Before testing weight tiers or base-plus-increment logic, confirm that product weights and SMART settings use the unit you expect.
Rounding
Rounding is most noticeable with percentage rates, discounts, increments, and handling fees. Test an order that produces a non-round number so you can confirm the checkout price matches your expectation.
How settings fit with other modules
| Module | Settings impact |
|---|---|
| Delivery customizations | Mostly affects how existing methods are controlled, not rate calculation |
| Shipping rates | Affects calculated price behavior, especially weight, rounding, and multiple matches |
| Combined rates | Works with tagged calculated rates, then blends by sum, cheapest, most expensive, or average |
For next steps, read Shipping rates and zones, Combined rates, or Test your setup.
Review settings before checkout testing
Use SMART to control weight units, multiple rate behavior, rounding, delivery customizations, and calculated rates.
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Frequently asked questions
›What settings should I check first?
Check weight unit, multiple rates behavior, and rounding before testing calculated rates.
›What happens if several SMART rates match?
Settings can show all, show the highest, show the lowest, or show the cheapest and most expensive matching rates.
›Does rounding affect fixed rates?
Rounding is usually most noticeable with percentage rates, discounts, increments, and handling fees. Fixed rates may already be round numbers.
›Do settings remove the need for combined rates?
No. Use Combined rates when tagged calculated rates should be blended into one checkout method.