Discount Calculator
Estimate sale price, savings, and remaining percentage after a discount.
How to use this discount calculator
- Enter the original price
Type the pre-discount price in the Original price field.
- Enter the discount rate
Enter the percentage off in the Discount rate field (e.g. 25 for 25% off).
- Review the results
The calculator shows You pay (sale price), You save (amount saved), and Price remaining (percentage of original you still pay).
How this discount calculator works
This discount calculator determines the sale price, savings amount, and remaining price percentage when a percentage discount is applied to an original price. The math is straightforward multiplication, but the tool is designed to eliminate mental-math errors during shopping, pricing decisions, and promotional analysis. It is especially useful when comparing multiple discounts, evaluating whether a sale price is genuinely competitive, or confirming that a retailer's advertised savings match the actual markdown.
Sale price = original price × (1 – discount rate / 100) ; Savings = original price × (discount rate / 100) An item originally priced at $85 with a 30 % discount: savings = $25.50, and the sale price = $59.50. You pay 70 % of the original price. If the same item had a 15 % discount instead, the sale price would be $72.25 — making the difference between the two discounts $12.75.
A 15 % discount on $85 gives a sale price of $72.25 — $12.75 more than a 30 % discount, which would bring the price to $59.50. You save $25.50 with the larger discount.
- ✓ The discount applies to the full original price as a single percentage — stacked or sequential discounts (e.g. 20% off then an additional 10% off) require separate calculations because they do not simply add together.
- ✓ Sales tax is not included in the calculation — the actual amount paid at checkout will be higher in jurisdictions that charge tax on the sale price.
- ✓ The original price is assumed to be the genuine pre-discount price; inflated 'original' prices (a common retail tactic) make the discount appear larger than the real markdown.
- ✓ Quantity discounts, buy-one-get-one promotions, and coupon stacking follow different rules and are not modeled here.
- Sequential discounts do not add linearly: a 20% discount followed by an additional 10% off yields a 28% total discount (1 – 0.80 × 0.90 = 0.28), not 30%.
- When comparing sale prices across retailers, convert everything to the final price amount rather than comparing discount percentages — a 40% off a higher original price may still cost more than 20% off elsewhere.
- Retailers are required in many jurisdictions to display the original price alongside the sale price under consumer protection regulations, but enforcement varies.
- For bulk pricing decisions, calculate the per-unit discount to determine whether a volume deal genuinely saves money after accounting for the larger purchase commitment.
- Consumer protection guidance on reference pricing and discount claims
- Consumer price comparison methodology references
Why discount percentages do not add linearly
A 20% discount followed by an additional 10% off does not equal 30% off. The second discount applies to the already-reduced price, so you pay 80% of the original, then 90% of that — 72% total, or 28% off. This calculator applies a single percentage to the full original price. For stacked promotions, run separate calculations and apply each discount to the previous result.
Discount calculator FAQs
How do I calculate a discount on top of another discount?
Apply the first discount to get a reduced price, then apply the second discount to that reduced price — not the original. For example, 20% off 100 gives 80, then 10% off 80 gives 72, which is a 28% total discount rather than 30%.
Does this include sales tax?
No. Sales tax is applied at checkout on the sale price (in most jurisdictions), so the actual total you pay will be the sale price plus applicable tax.
How can I tell if a sale price is a good deal?
Compare the final sale price — not just the discount percentage — against what other retailers charge for the same item. A high discount percentage on an inflated original price may still not be competitive.
What is the difference between discount and markup?
A discount reduces a price from a higher starting point (buyer's perspective). A markup adds to a cost to set a selling price (seller's perspective). A 25% discount on a $100 item gives $75, while a 25% markup on a $75 cost gives roughly $93.75.
Can I use this for business pricing decisions?
Yes. Enter your list price as the original price and the promotional discount rate to see the resulting revenue per unit and the margin impact before launching a sale or promotion.