Deterministic parcel dimensional weight vs actual billable weight calculator. Pa...

{ "method": "GET", "queryParams": { "actual_lb": "3.2", "divisor": "139", "height_in": "6", "length_in": "14", "width_in": "10" }, "type": "http" }

{ "example": { "as_of": "2026-10-25", "geometry": { "cubic_feet": 0.49, "cubic_inches": 840, "exceeds_one_cubic_foot": false, "length_plus_girth_in": 46, "oversize_surcharge_risk": false }, "inputs": { "actual_lb": 3.2, "divisor": 139, "height_in": 6, "length_in": 14, "width_in": 10 }, "rightsizing_opportunity": { "billable_lb_saved_by_trimming_1_inch_height": 1, "one_inch_height_reduction_billable_lb": 6, "recommendation": "You are paying for 3 lb of 'air'. Switching to a multi-depth scored carton or poly mailer (if non-fragile) directly lowers carrier zone rates." }, "weight_comparison": { "actual_rounded_lb": 4, "actual_weight_lb": 3.2, "billable_weight_lb": 7, "billed_by": "dimensional_weight", "dim_weight_exact_lb": 6.04, "dim_weight_rounded_lb": 7, "usps_ground_advantage_billable_lb": 4 } }, "type": "json" }