Free Online Freight Calculators • In-Browser Calculation

Free calculators for
Amazon sellers and importers

Check pallets against Amazon limits, estimate container CBM cubing, audit courier dimensional weight, model LCL vs. FCL break-evens, evaluate Incoterms, and estimate customs duty.

Try the FBA Pallet Calculator View All Tools ↓

Independent project built & maintained by one developer · Your carton dimensions never leave your browser.

Shipping & Freight Calculators

Instant, private planning tools with printable manifests and interactive visualizers.

Pallet Stacking

Amazon FBA Pallet Calculator

Calculate Ti-Hi layer configurations, gross pallet weight, and verify your stack stays within Amazon's 72" height and 1,500 lb limits.

✓ GMA 48×40 & Euro pallets
✓ Ti-Hi layer solver
✓ Printable warehouse slip

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Ocean Freight (FCL)

CBM Container Calculator

Estimate carton cubing and payload capacities for 20ft, 40ft, and 40ft High Cube containers with realistic broken stowage margins.

✓ 20GP, 40GP & 40HC specs
✓ CBM space vs payload weight
✓ Floor plan & elevation views

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Carrier Billing & DIM

Dimensional Weight Calculator

Audit dimensional billable weight across FedEx, UPS, USPS, and air freight. Identify surcharge triggers and compare divisors.

✓ Divisors 139, 166, 5000 & 6000
✓ Additional Handling alerts
✓ Right-sizing savings estimate

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Ocean Freight Cost

LCL vs. FCL Break-Even Calculator

Compare total landed ocean freight costs between shared LCL consolidation and dedicated 20ft/40ft FCL containers.

✓ Break-even CBM volume
✓ CFS origin & destination fees
✓ Interactive cost curve

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Trade Compliance

Incoterms 2020 Decision Matrix

Clarify buyer vs. seller responsibilities, freight payment, and exact risk transfer points across all 11 official ICC Incoterms rules.

✓ 11 Official Incoterms rules
✓ Interactive risk timeline
✓ Buyer vs. seller cost checklist

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Customs & Tariffs

US Customs Duty & Tariff Calculator

Estimate landed duty costs, base MFN import tariffs, Section 301 China surcharges, and statutory MPF/HMF port fees.

✓ Base MFN duty calculation
✓ Section 301 trade remedies
✓ Statutory MPF & HMF limits

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Amazon FBA Inbound

Amazon Inbound Placement Simulator

Model Amazon FBA inbound placement service fees against regional split shipping costs to find your lowest-cost inbound strategy.

✓ Minimal vs. partial splits
✓ Standard & Bulky size tiers
✓ Split freight trade-off math

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Who Uses Calqor

Built specifically for supply chain operators, e-commerce sellers, and small shippers.

Amazon FBA Sellers & 3PLs

Verify Ti-Hi pallet layers, total stack height, and gross weight before booking LTL/FTL carriers to prevent costly receiving delays or dock rejections.

Importers & Sourcing Planners

Estimate carton loading in 20ft and 40ft containers, account for broken stowage margins, and find the break-even volume between LCL and FCL bookings.

Parcel & Air Shippers

Audit dimensional weight across FedEx, UPS, USPS, and air cargo divisors. Flag Additional Handling and Oversize surcharge triggers before dispatch.

How Accurate Are These Calculators?

Our calculations are based on published Amazon Seller Central inbound receiving specifications, ISO 668 shipping container standards, and current carrier service guides. Review all formulas, physical tolerances, and worked test cases openly on our Methodology page.

View Methodology →