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Meet HSTCalculator.Onl – Canada’s Free & Private GST/HST Calculator

I Built HSTCalculator.Onl to Fix Canada's Messy Online Tax Calculators

Why I Created HSTCalculator.Onl

As a Canadian freelancer, I constantly found myself Googling GST/HST rates and wasting time on tax calculators filled with ads, pop-ups, and confusing forms. I wanted something fast, accurate, and easy to use — but couldn’t find a reliable tool. So, I built one.

The Problem

Every Canadian business owner, freelancer, or bookkeeper faces the same issues:

  • GST/HST rates change across provinces
  • Tax tools online are either outdated, full of ads, or require signups
  • You just need a quick breakdown — not a whole form to fill

Introducing HSTCalculator.Onl

HSTCalculator.Onl is a fast, privacy-first web tool that helps Canadians calculate GST and HST instantly based on their province.

✅ Features:

  • Province-specific GST/HST rates preloaded 🇨🇦
  • Add or remove tax from any amount
  • Instant breakdown of federal and provincial tax
  • One-click PDF export for invoices or bookkeeping
  • Fully mobile-friendly – no login, no ads, no data collected

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How It Works

  1. Go to hstcalculator.onl
  2. Choose your province from the dropdown
  3. Enter the amount (before or after tax)
  4. Instantly see federal GST, provincial HST, and final total
  5. Optionally export your result as a PDF

Why It's Different

Unlike many other online calculators, HSTCalculator.Onl:

  • Loads instantly, even on slow networks
  • Is privacy-first (no cookies, tracking, or analytics)
  • Works on mobile and desktop
  • Doesn’t ask for your email or payment
  • Designed by a developer who actually uses it daily

A Tool for Canadians by a Canadian 🇨🇦

HSTCalculator.Onl isn’t just a project — it’s a solution I needed myself. Whether you’re an eCommerce seller, a freelance designer, or an accountant helping small businesses, this tool can save you time and avoid mistakes.

I’d Love Your Feedback

I’m constantly improving the calculator. If you have feedback, feature requests, or ideas — drop them in the comments!

Try It Now → hstcalculator.onl

Bookmark it for tax season, and share it with a Canadian business owner!


Author: Tara Rebecca
Founder of HSTCalculator.Onl — Building ad-free, zero-hassle tax tools for Canadians who just want answers, not noise.


Explore our developer work:

LeetCode – Tax logic challenges

Replit – Run our code in-browser

Docker Hub – Microservices for tax

CodeSandbox – Live UI and backend demos

Built for freelancers, SMBs, and tax pros who value speed and simplicity.

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