About Calqor
Fast, private, and practical calculators designed for Amazon FBA sellers, e-commerce brand owners, and international freight shippers.
Why Calqor Was Built
Calqor is an independent web utility built and maintained by a solo software developer. It was created to solve a simple but frustrating problem in day-to-day freight planning: finding clean, accurate, and instant shipping calculators that don't force you through marketing funnels or store your confidential shipment manifests on unknown servers.
Most logistics utilities online today fall into two extremes. They are either clunky, decades-old web forms with intrusive popups, or expensive SaaS platforms requiring account signups, sales calls, and credit cards just to estimate how many cartons fit onto a standard pallet or container. Worse, many web calculators send your proprietary carton sizes, SKU counts, and product quantities over the wire to remote databases.
Calqor is built on a different philosophy:
- Pure client-side privacy: Your carton sizes, weights, and quantities are calculated locally in your web browser. Nothing you type is sent to or stored on our servers.
- Instant visual feedback: You immediately see how changing a carton dimension by half an inch changes your pallet layer (Ti), stack height (Hi), or dimensional weight divisor.
- No mandatory sign-ups: Open the tool, run your numbers, print your pallet slip or export your breakdown, and get back to your business.
What the Tools Do
Calculates Ti-Hi tier arrangements, overhang risks, and warns when stacks approach Amazon's 72" height or 1,500 lb gross weight thresholds.
Estimates carton cubing and payload capacities for 20ft, 40ft, and 40ft High Cube containers, factoring in realistic broken stowage margins.
Compares billable weight across FedEx, UPS, USPS, and air freight divisors (139, 166, 5000), highlighting package surcharge triggers.
Evaluates total ocean shipment costs to show the exact volume (CBM) break-even point where booking a dedicated FCL container becomes cheaper than LCL.
Visualizes commercial cost and risk transfer points across all 11 official Incoterms rules from origin factory to destination door.
Estimates US import tariffs, Section 301 China trade remedy surcharges, and statutory MPF/HMF merchandise processing fees.
Models per-unit Amazon inbound placement fees against multi-location regional freight split costs across Standard and Bulky tiers.
How Calqor is Funded
Calqor is completely free for individual sellers, forwarders, and logistics teams. To cover hosting, continuous updates, and domain infrastructure, the site displays programmatic advertisements through Google AdSense.
I am committed to keeping ads unobtrusive. We do not use full-screen interstitial popups that block calculations, and calculator tools remain unobstructed. For details on how advertising partners use cookies and your privacy options, please read our Privacy Policy.
Accuracy, Assumptions & Feedback
In freight, one wrong number can result in warehouse rejections, re-weighing penalties, or unexpected surcharges. That is why our mathematical formulas, dimensional tolerances, and data sources are published openly on our Methodology & Math page.
However, because real-world corrugated boxes can bulge, truck axle weight restrictions vary by state, and carriers frequently revise their dimensional weight rules, results must always be used as planning estimates. Always verify critical shipment dimensions and weight limits with your freight forwarder or carrier before dispatching goods.
If you spot a formula error, have an updated carrier surcharge rule to share, or want to suggest a feature, please reach out via our Contact page or email directly at [email protected].
Independent Publisher Notice
Calqor is an independent publication and web utility. Calqor is not affiliated with, sponsored by, or endorsed by Amazon.com, Inc., FedEx, United Parcel Service (UPS), DHL International GmbH, or the United States Postal Service (USPS). All carrier names and trademarks belong to their respective holders and are used nominatively to identify applicable logistics standards. Full details are available in our Terms of Service.