Sale price and savings
Enter the original price and discount percentage to see how much you save and the final sale price. Add a quantity to total savings across multiple items.
How this discount calculator works
Sale price and savings
Retail discounts are usually stated as a percentage off the original price. This page turns that into a savings amount and a sale price. If you buy more than one identical item at the same discount, optional quantity multiplies both savings and what you pay.
Formulas
- Discount amount (one item) = original × discount% ÷ 100
- Sale price (one item) = original − discount amount
- Total saved = discount amount × quantity
- Total to pay = sale price × quantity
Worked example
An item listed at £40 with 25% off saves £10, so the sale price is £30. Buying 3 of them saves £30 total and costs £90.
Stacked discounts and “up to” sales
Two successive 20% discounts are not 40% off the original: the second discount applies to the already-reduced price, which leaves 64% of the original (a 36% total reduction). Shop notices that say “up to 50% off” may apply only to selected lines — always convert the percentage that applies to your item.
Common mistakes
- Comparing sale prices across packs without checking unit price — use Unit Price.
- Forgetting tax: some tickets show discount before VAT is added back — see VAT / Sales Tax.
- Assuming a coupon stacks with a storewide percent off when the terms forbid it.
FAQs
- Is “£10 off” the same as a percent?
- No. Enter an equivalent percent only if you first compute 10 ÷ original × 100, or convert fixed off amounts separately.
- How do I reverse a discount?
- If you know the sale price and percent off, sale = original × (1 − p/100), so original = sale ÷ (1 − p/100).
Full guide: Percentages, discounts, and VAT
Related: Percentage, Unit Price, Tip.
Last updated: July 2026