How do stacked discounts work?

They multiply rather than add. An extra 20% off an already discounted price applies to the reduced amount, not the original.

Why is 50% plus 50% not free?

Because the second 50% applies to the already-reduced price, leaving 25% of the original rather than zero.

Discount Calculator | Tsinglin.tech

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Original price ($)

Discount (%)

Extra discount (%)

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Work out the final price after one or two stacked discounts and see exactly how much you save. Free, no signup.

How to use Discount Calculator

Open the toolNo signup and nothing to install; it works as soon as the page loads.
Set “Original price”
Set “Discount”
Set “Extra discount”
Read the resultChange any input and the result is recalculated immediately.

Worked example with the defaults

FINAL PRICE · You save $36.00 (30.0% off): $84.00

Nothing you enter leaves your device

All of the work happens inside your browser. Whatever you type is never packaged up and sent to a server, and no request this page makes carries it.

That makes it safe for contract amounts, personal details and internal documents you would rather not hand to a third party — close the tab and it is gone.

What this tool does not do

Discount Calculator only does what a browser can do on its own — it talks to no backend service. So it keeps no history for you and syncs nothing across devices; if you need a record, copy or download the result.

It is also not a substitute for professional judgement. For legal, medical or tax decisions, treat the output as a starting point rather than a final answer.

Frequently Asked Questions

How do stacked discounts work?: They multiply rather than add. An extra 20% off an already discounted price applies to the reduced amount, not the original.
Why is 50% plus 50% not free?: Because the second 50% applies to the already-reduced price, leaving 25% of the original rather than zero.