Shipping and fulfillment calculators
Set shipping prices that customers accept and that don't quietly eat your margin.
CalculatorFree Shipping Threshold CalculatorFind the order value where free shipping pays for itself, then see what a threshold does to monthly profit.CalculatorUSPS Cubic Pricing CalculatorFind your Priority Mail Cubic and USPS Ground Advantage Cubic tier for boxes and soft packs, under the rules in force since July 12, 2026.CalculatorUPS & FedEx Surcharge CheckerEnter a box's size and weight to see if UPS or FedEx will add Additional Handling, Large Package or Oversize charges under the 2026 rules.CalculatorDimensional Weight CalculatorSee the billable weight USPS, UPS, FedEx and DHL will actually charge for a box, using each carrier's current divisor and rounding rules.CalculatorUSPS Zone CalculatorLook up the USPS shipping zone for a delivery based on distance, so you can see roughly what it'll cost before you check a rate.CalculatorShipping Box Size CalculatorFind the smallest standard box that fits your product, and see the weight and cost you'd save over the box you use now.CalculatorFlat Rate vs Calculated Shipping CalculatorSee whether a flat-rate box or weight-based calculated shipping keeps more margin, across your store's real mix of light, medium and heavy orders.CalculatorHoliday Shipping Deadlines CalculatorUSPS and FedEx's own 2026 Christmas ship-by dates, plus a calculator to work out a ship-by date for any deadline and carrier.CalculatorDelivery Date CalculatorWork out an estimated delivery date from your order cutoff time, processing days and carrier transit time, skipping weekends and holidays.CalculatorCost of Returns CalculatorSee what a return really costs once you add the label, restocking time, support time, write-offs and the payment fee you don't get back.CalculatorShipping Insurance CalculatorCompare self-insuring, your carrier's free included coverage and third-party shipping insurance, at your own loss rate.Calculator3PL Cost CalculatorAdd up receiving, storage, pick, pack and shipping fees to estimate a 3PL's monthly bill, and compare it with what you pay now.CalculatorVolumetric Weight CalculatorWork out the chargeable weight international couriers and air freight forwarders bill, using the metric 5,000 and 6,000 divisors.