Discount calculator
Two 30% discounts do not make 60% but 51%, because the second applies to the already reduced price. The tool chains the discounts and shows the real reduction.
A crossed-out price does not guarantee a real reduction. European rules require the reference price shown to be the lowest applied in the previous 30 days, but checking is still down to the buyer.
Frequently asked questions
Why is 30% plus 30% not 60%?
Because the second discount applies to 70% of the price, not the whole. The result is 0.7 × 0.7 = 0.49, a total reduction of 51%.
Does the order of discounts matter?
No, multiplication is commutative. Order only matters when one of the reductions is a fixed amount rather than a percentage.
How do I check whether the discount is real?
Look up the price history on tracking sites or in search engine caches. A discount announced after a recent price rise is not a discount.