As a Canadian freelancer, I found myself constantly searching for a fast, reliable way to calculate Harmonized Sales Tax (HST) — not just for Ontario, but also for provinces like Nova Scotia and PEI. Every time I had to invoice a client or check how much tax was included in a total amount, I ended up doing manual math or clicking through cluttered government sites. That frustration led to a simple idea: build a tool that does exactly what I need, without distractions. So I created [HSTCalculator.onl](https://hstcalculator.onl), a free online utility that lets anyone instantly add or remove HST based on province-specific rates. Whether you’re a business owner, a freelancer, or just shopping online, the tool helps you calculate: * Net amount (before tax) * HST amount (based on selected province) * Total amount (after adding tax) **No signup. No ads. Just accurate results in one click.** It’s built with simplicity in mind — works on desktop and mobile, loads instantly, and respects your privacy (no data is collected). As of now, the tool supports all HST provinces: * Ontario – 13% * Nova Scotia – 15% * New Brunswick – 15% * Newfoundland and Labrador – 15% * Prince Edward Island – 15% This project was created under my developer identity, **Tara Rebecca**, as part of my mission to build helpful micro-tools that solve everyday problems. If you’ve ever felt confused about how much HST you’re paying — or want to double-check before sending an invoice — give it a try: 👉 [https://hstcalculator.onl](https://hstcalculator.onl) **Feel free to share it with fellow Canadians who could use a reliable HST calculator.** --- **Tags:** #HSTCalculator #CanadianTax #SmallBusinessTools #FreelancerFinance