Why This Tool Exists

DutyCalc was built to solve one focused problem well, without asking you to sign up, install anything, or hand over your data. Too many tools on the internet wrap a simple utility in an account wall, an email capture, or a heavy SaaS interface. This one doesn't.

Our thesis is simple: the best small tools are ones you can use in under ten seconds, trust with sensitive inputs, and come back to any time without friction. That's the bar we hold ourselves to.

How It Works

DutyCalc calculates US customs import duty, tariffs, and total landed cost instantly — covering Section 122, Section 232, and Section 301 rates across 20+ origin countries. Everything runs in your browser: the calculations, lookups, and comparison math happen locally on your device using modern JavaScript. Nothing you enter is uploaded to our servers. We see page views (anonymized, via Google Analytics) but never your inputs.

If your internet connection drops after the page loads, the tool keeps working. That's not an accident — it's the architecture. Client-side processing is faster, more private, and more resilient than any server-backed alternative.

Our Privacy Philosophy

We do not collect, store, or transmit the data you enter into the tool. There is no database of user submissions because there is no submission to the server in the first place. The only data we see is standard web analytics: page views, referrers, rough geography, browser — the aggregated kind of data that every website receives.

Read the full details in our Privacy Policy.

Who Built This

DutyCalc is built and maintained by TJ (Tushar Jaitly), a Solution Architect who spends his nights and weekends shipping small, focused tools that scratch real itches. The broader portfolio is a collection of utilities — each solving one problem, each free, each privacy-first.

You can find the rest of the portfolio and follow along on GitHub.

How This Tool Stays Free

DutyCalc is funded by non-intrusive display advertising (Google AdSense) on some pages. That covers hosting and keeps the tool free for everyone. If you want to support it without seeing ads, sharing the tool with someone who needs it is the best thing you can do — word of mouth is how a free utility survives.

Tech Credits

DutyCalc is built with Next.js, React, TypeScript, and Tailwind CSS. It is hosted on Vercel. Thank you to all the open-source maintainers whose work makes this possible.

Get in Touch

Found a bug? Have a feature request? Want to suggest a tool we should build next? We read every message. Visit our contact page to reach out.

About DutyCalc