Discount Calculator
Calculate the final sale price and the amount you save from an original price and a percentage discount.
Embed this tool
Copy the snippet and paste it anywhere on your website — WordPress, Shopify, Webflow, or plain HTML. It stays free, with a small “Powered by Plainso” link.
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Frequently asked questions
Quick answers before you start.
How do I calculate a discount?
Multiply the original price by the discount percentage and divide by 100 to get the saving, then subtract it from the price. A 25% discount on 2,000 is 2,000 × 25 ÷ 100 = 500 off, so you pay 1,500.
What is the final price formula?
Final price = original price × (1 − discount ÷ 100). At 25% off that is original × 0.75 — the same as finding the saving and subtracting it, just in one step.
Do stacked discounts add up?
No. 25% off then a further 10% off is not 35% off — it is 1 − (0.75 × 0.9) = 32.5% off. The second discount applies to the already-reduced price, so the combined saving is always less than the sum.