Stop paying to ship air. See what packaging is doing to your margin.
1368x turns package dimensions and your real order economics into a diagnosis: what drives billable weight, where margin leaks, and what to change next.
Five decisions. One path from package to margin.
Calculate the constraint, diagnose the leak, then change the variable that matters.
DIM Weight Calculator
Compare dimensional and actual weight, quantify the DIM gap, and see how much package volume must come out.
Open calculator → 02 · Pre-flightPackage Size Checker
Check weight, longest side and length-plus-girth against the limits you enter.
Check a package → 03 · PackagingBox Optimizer
Find a compact box layout and compare modeled DIM weight with your current package.
Optimize a box → 04 · ConversionFree Shipping Threshold
Estimate the order value needed to offer free shipping without missing your margin target.
Set a threshold → 05 · MarginShipping Break-even
See profit after fees and fulfillment, plus how much shipping cost you can absorb.
Check break-even →Calculate → diagnose → recommend → save.
Calculate. Turn package and order data into a baseline.
Diagnose. Find the variable driving cost.
Recommend. See what to change next.
Save. Measure the effect using your real shipping cost.
Know where every number comes from.
Carrier rules. Your DIM divisor and package limits.
Your economics. Your actual shipping costs, AOV, fees and margins.
1368x engine. Transparent calculations performed locally in your browser.
How calculations work →Calculations run locally in your browser. 1368x V1 does not upload your package or margin data.