WebToolsHUBFor reference only — taxes, shipping and store terms affect what you actually pay.
How to calculate a discounted price
- Pick the mode that matches the offer: a plain percentage off, two stacked discounts, or a spend-X-get-Y voucher.
- Enter the original price and the offer details.
- Read the final price, your savings and the true effective discount — stacked offers rarely equal their added percentages.
- For vouchers, the tool tells you plainly when the spend threshold is not reached.
- Compare offers side by side by re-entering each one; the effective rate is the honest comparison point.
Frequently Asked Questions
Why do 20% + 10% not equal 30% off?
Stacked discounts multiply rather than add: 20% off leaves 80%, and the second 10% comes off that remainder — 80% × 90% = 72% of the original, an effective 28% discount. Retailers exploit the difference, so the effective rate is the number to trust.
Does the order of stacked discounts matter?
No — multiplication is commutative, so 20%-then-10% lands on the same final price as 10%-then-20%. What matters is whether the store stacks them at all; many apply the strictest discount first and exclude items.
How do spend-X-get-Y vouchers work?
The voucher only applies once your price reaches the threshold, then subtracts the fixed amount — 100-off-20 on a 95 basket does nothing, which the tool shows explicitly instead of silently applying it.
Is my shopping data stored or sent anywhere?
No. Every calculation runs locally in your browser as you type, and nothing is saved, logged or transmitted.
Is this financial advice?
No — it is arithmetic for reference only. Taxes, shipping, return rights and store terms all affect the real cost of a purchase.