You pay
$0.00
You save
$0.00

🔒 Runs entirely in your browser.

Using an AI agent or a script? Call this tool as an API

AI agents and scripts can call this tool directly, to check their work or look something up, and get JSON back with the same answer this page gives. No key needed.

GET https://digitalgreenhouse.com.au/api/tools/discount-calculator?price=249.95&discount=30
  • price — number, required. Original price.
  • discount — number, required. Percentage off.
  • extra — number, optional. Optional further percentage off the already-reduced price.

The API answers from our server, and our code doesn’t store what you send. Fair-use limits apply. API guide · all endpoints (JSON) · OpenAPI

How sale prices work

A discount is a percentage taken off the original price. 30% off $80 means you pay 70% of $80, which is $56, saving $24. “Stacked” discounts — like “take a further 10% off already-reduced stock” — apply to the already-discounted price, not the original, so they’re worth less than simply adding the percentages together. This tool handles both, and shows your real total saving as a percentage so you can compare offers honestly.

Is 30% + 10% the same as 40% off?
No. Stacking 30% then 10% leaves you paying 70% × 90% = 63% of the price, a 37% total discount — not 40%. This tool shows the true figure.
Does this include GST?
It works on whatever price you enter. Australian retail prices already include GST, so the result is what you’d pay at the register.

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