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GST added to a price, or GST extracted from a total that already includes it. Taking it out is not 5% of the total — it is five hundred and fifths, which is why the answer on a $105 receipt is $5.00 and not $5.25.
$105.00
Total with tax in Alberta
$5.00
GST
$5.00
Tax altogether
General goods and services. Every province exempts or zero-rates a different list — basic groceries, books, children’s clothing, some services — and none of that is modelled here.
Alberta has no provincial sales tax, so 5% GST is the whole of it — the lowest combined rate in the country, and the reason a cross-border shopping trip works in this direction.
Fill in the fields. There is nothing to upload because there is nothing to send — the numbers you enter never leave this tab.
The arithmetic runs in your browser, on your own device, and the answer updates with every keystroke. Nothing is sent anywhere — so there is no record of what you earn, what you owe, or what you are thinking of buying.
One press puts it on your clipboard, ready to paste where you need it. There is no file to download — the result is text, not a document. Nothing is remembered — reload and the fields go back to their defaults, so copy anything you want to keep.