Built for the people who move global trade.
SSLT Global is a free calculator and reference suite for international trade - Letters of Credit, freight, customs, Incoterms 2020 and commodity pricing. No login. No paywalls. No feature-gated pop-ups. Just 55 tools that do the job.
Last reviewed: August 2026 · Built against UCP 600 · ISBP 821 · Incoterms® 2020 · US HTS 2026 R15.1
Interest uses per-currency day-count (ACT/360 vs ACT/365). Duty stacking follows regional VAT/GST rules. Incoterms map to UCP 600 / ISBP 821 wording. Every formula is documented on the tool page.
Every calculation serialises into a shareable link. Email your colleague a URL and they see exactly what you saw - no accounts, no seats, no signup.
Used by exporters, freight forwarders, LC ops teams and commodity traders across 40+ countries. Optimised for the reality of a trade desk: fast, keyboard-friendly, printable.
These tools are decision-support, not advice. HS classification, sanctions screening and LC drafting still require a licensed broker, compliance officer or banker. We say so clearly on every relevant tool.
Who we build for
- Exporters and importers preparing LC applications and quotes.
- Freight forwarders sizing CBM, chargeable weight and LCL/FCL breakpoints.
- Customs brokers modelling duty, VAT and landed cost across regimes.
- Trade finance and LC operations teams checking cost, tolerance and fees.
- Commodity traders converting units, moisture bases and basis differentials.
Explore by category
Methodology: how we build and verify calculators
Every tool on SSLT Global is built from the primary source document, not a secondary summary of it. The approach for each category:
- Trade finance (LC, SBLC, usance): Formulas derive directly from UCP 600 articles and ISBP 821 examination rules. Day-count conventions (ACT/360 vs ACT/365) follow the money-market standard for each currency - not a simplified annual-rate approximation.
- Freight (CBM, chargeable weight, LCL): IATA TACT dimensional factors and W/M rules per carrier tariff practice. Container specifications from ISO 668 and published carrier datasheets.
- Customs & landed cost: MFN duty rates sourced from the WTO Tariff Download Facility and national customs authorities (USITC, TARIC, CBIC). India duty stacking follows CBIC Customs Tariff Act 1975 and the GST Compensation Cess schedule.
- Incoterms: Every risk transfer point, obligation, and insurance requirement is mapped from ICC Publication 723E (Incoterms® 2020). No paraphrasing - the ICC wording is preserved.
- Bulk cargo (coal, draft survey): GAR/NAR/ADB conversions follow ISO 1928. Draft survey calculations use the mean-of-means method per standard industry practice (ASTM D5865 for calorific value equivalents).
Where a formula has multiple acceptable industry conventions, we implement the most widely used version and document the alternative on the tool page. If you spot an error or a better source, use the contact page - corrections are triaged weekly.
Methodology last reviewed: August 2026
Editorial standards
Every calculator and guide on SSLT Global is written and reviewed against the current published texts of the standards it cites - not summaries or third-party paraphrases:
- UCP 600 (ICC Publication 600) and ISBP 821 - for all documentary-credit content.
- URDG 758 (ICC 758) and ISP98 - for demand guarantees and standbys.
- Incoterms® 2020 (ICC 723E) - for every risk, cost and delivery statement.
- IATA TACT - for air freight chargeable weight and dimensional-factor rules.
- WCO Harmonized System and the WTO Valuation Agreement (Art. VII GATT) - for HS classification and customs value.
- National tariff schedules and central-bank rate curves are cited where used.
Every guide carries a visible publish and last-modified date. Corrections and reader feedback are triaged weekly - send them via the contact page. We do not accept paid placements inside calculators or guides; sponsorship, when it appears, is clearly labelled.