Tools built to give you a straight answer.

Bustech.site is an independent collection of practical business and technology calculators, starting with the Profit Margin Calculator. No sign-ups, no clutter — just a clear number when you need one.

What We Build

Every tool on Bustech.site is designed around one question: what does this number actually mean for your business, and what should you check next. We favour plain explanations over jargon, and a fast, live result over a long form.

We’re not trying to be a dashboard or a finance suite. Each calculator is a small, focused product on its own — built carefully, and kept honest about what it can and can’t tell you.

Practical first

Every tool answers a real, everyday business question — nothing built just to fill a menu.

No noise

No accounts, no pop-ups, no upsells. Enter your numbers and get your answer.

Built for anyone

Plain English, on any device, for an international audience — not just finance teams.

Who It’s For

Small business owners, freelancers, retailers, e-commerce sellers and service providers — anyone who needs a reliable business or technology calculation without opening a spreadsheet or booking a call with an accountant.

Contact

Have a question, a correction, or a tool you’d like us to build next? We’d like to hear it.

Email hello@bustech.site

Support support@bustech.site

Response time Within 1–2 business days