How is the final price calculated?

The tool multiplies the original price by (1 − discount ÷ 100). If you add an extra discount, it applies that second percentage to the already-discounted price, the same way stores stack "25% off, plus an extra 10% off" promotions.

Why isn't a 25% + 10% discount the same as 35% off?

Stacked discounts are multiplicative, not additive. Taking 10% off a price that's already 25% off removes 10% of a smaller number, so the combined saving works out to 32.5% off the original price, not 35%.

Can I use this for tax-inclusive prices?

Yes — it just does percentage math on whatever number you enter, so you can apply it before or after tax depending on how your original price is quoted.

Is my pricing data sent anywhere?

No. All calculations run locally in your browser with JavaScript — nothing is transmitted or stored.

DISCOUNT CALCULATOR

Enter a price and a discount to see the final price and how much you save. Nothing leaves your browser.

Original price

Discount (%)

Extra discount (%)

Extra discount applies on top of the first (stacked, not added) — leave at 0 for a single discount.

Final price60.00

You save20.00

Total off25%

How to use the discount calculator

1
Enter the original price of the item.
2
Enter the discount percentage.
3
Optionally add a second, stacked discount for extra promotions.
4
Read the final price and total amount saved.

Questions

How is the final price calculated?: The tool multiplies the original price by (1 − discount ÷ 100). If you add an extra discount, it applies that second percentage to the already-discounted price, the same way stores stack "25% off, plus an extra 10% off" promotions.
Why isn't a 25% + 10% discount the same as 35% off?: Stacked discounts are multiplicative, not additive. Taking 10% off a price that's already 25% off removes 10% of a smaller number, so the combined saving works out to 32.5% off the original price, not 35%.
Can I use this for tax-inclusive prices?: Yes — it just does percentage math on whatever number you enter, so you can apply it before or after tax depending on how your original price is quoted.
Is my pricing data sent anywhere?: No. All calculations run locally in your browser with JavaScript — nothing is transmitted or stored.