about

EZ Time Calculator (eztimecalculator.com) is a small, focused suite of free tools for doing math with time. It started as a personal project — every existing time calculator on the web was either covered in pop-ups, hidden behind sign-up walls, or served a generic answer that didn't account for things like business days, breaks, or daylight-saving transitions. So we built our own. No accounts. No analytics by default. No newsletter. Just answers as fast as you can type the question.

› who this is for

Anyone who has to think in minutes for a living: freelancers and contractors filling out timesheets, project managers calculating deadlines across timezones, parents counting down to a vacation, students working out study sessions, ops teams scheduling maintenance windows, lawyers and accountants billing in 6-minute increments, and developers who need to convert a Unix timestamp right now without leaving the browser.

› how the math works

All calculations run entirely in your browser using JavaScript's native Date and Intl APIs. Nothing is sent to a server. That means three things: it's fast, it's private, and it works offline once the page has loaded. For timezone conversions we rely on the IANA timezone database that ships with every modern browser, so daylight-saving rules are correct without us having to maintain a separate list. Business-day calculations exclude Saturday and Sunday but do not account for regional public holidays — if that matters to you, subtract them manually in the add/subtract tool.

› the design

The look is intentional: a warm cream paper, deep ink text, a single amber accent, and a monospaced font throughout. It was inspired by the dot-matrix printer paper and amber CRT terminals that accountants and engineers used through the 1980s. The aesthetic is a quiet protest against the assumption that every utility on the internet must look like the same blue-and-purple SaaS landing page.

› what's next

We add tools when we (or someone who emails us) actually need one. See the changelog for what's shipped and what's queued. Suggestions are welcome — see contact.