Find the sale price, discount amount, and savings percentage instantly.
A discount is a reduction from the regular or list price of a product or service. Discounts are used by retailers to attract buyers, clear inventory, reward loyalty, and compete in the marketplace. Understanding how to calculate discounts helps you quickly determine how much you actually save, compare deals across stores, and decide whether a marked-down price represents genuine value.
Discounts come in two main forms: percentage-based (e.g., 20% off) and fixed-amount (e.g., $10 off). Percentage discounts scale with the price — they save more in absolute dollar terms on expensive items. Fixed discounts are constant regardless of price, which can represent a great deal on lower-cost items.
Enter the original price and your discount (either a percentage or a flat amount), and the calculator instantly returns: the sale price you pay, the dollar amount you save, and the effective discount percentage. You can switch between percentage and fixed-amount mode at any time.
Discount Amount:
Discount = Original Price × (Discount% / 100)
Sale Price:
Sale Price = Original Price − Discount Amount
Effective Discount %:
Discount% = (Savings / Original Price) × 100
Discount = $250 × 0.30 = $75. Sale price = $250 − $75 = $175. You save $75 (30%). To verify: $175 / $250 = 0.70 → 30% off. ✓
Sale price = $55 − $15 = $40. Effective discount = ($15 / $55) × 100 = 27.3%. This is equivalent to a 27.3% percentage discount — good value for a grocery coupon.
Starting price $200. After 25%: $200 × 0.75 = $150. After 10% on $150: $150 × 0.90 = $135. Total saved: $65. Effective rate: 32.5% — not 35%, because the second discount applies to the already-reduced price.
Percentage Off
The most common format. 10%, 20%, 50% off. Scales with price — saves more in dollars on expensive items.
Fixed Dollar Off
$5 off, $20 off. Fixed saving regardless of item price. Best when applied to lower-cost items where the % equivalent is high.
BOGO
Buy One Get One Free = 50% per unit (for 2). BOGO 50% = 25% per unit. Only valuable if you need both items.
Clearance
End-of-season or excess inventory. Discounts of 30–80%+ are common. Often final sale — verify return policy.
Flash Sales
Time-limited deals (24 hours, 48 hours). Create urgency. Compare prices before buying — the "original" may be inflated.
Loyalty Discounts
Member-only pricing. Often 5–15%. Can stack with promotional discounts on some platforms.
Ignoring the absolute price
A 50% discount on a $400 item ($200 saved) is not automatically better than a 20% discount on a $30 item ($6 saved) if you didn't need the expensive item. Focus on whether the final price makes sense for your budget.
Conflating stacked discounts with added discounts
20% off + 10% off coupon does not equal 30% off. The second discount applies to the already-reduced price. Always calculate sequentially.
Not accounting for shipping costs
A 15% discount on a $40 item is effectively worthless if you pay $10 in shipping. Always calculate your true all-in cost.
Buying unneeded items just for the discount
Spending $60 to save $20 on something you wouldn't have bought otherwise means you lost $40. Savings only exist if you were going to make the purchase anyway.
Discount % = (Discount Amount / Original Price) × 100. For example, if an item costs $80 and is on sale for $60, the discount is $20 and the percentage is ($20 / $80) × 100 = 25%.
Sale Price = Original Price × (1 - Discount% / 100). For a $120 item with 30% off: $120 × 0.70 = $84.
Percentage off is proportional — 20% off means more savings on expensive items. A dollar off is flat. A percentage discount is usually better on pricier items; a dollar discount is better when the implied percentage is higher than available percentage deals.
Original Price = Sale Price / (1 - Discount% / 100). For a $75 sale price after 25% off: $75 / 0.75 = $100 original.
Buy One Get One Free equals 50% off per unit when buying two. BOGO 50% Off equals 25% off per unit. Only use BOGO deals if you genuinely need both items.
Sequential, not additive. A 20% then 10% discount gives: $100 × 0.80 × 0.90 = $72 — a 28% effective discount, not 30%.
Not always. Compare the sale price to real market value and ask yourself if you would buy it without the discount. Retailers sometimes inflate base prices before sales.
Clearance discounts typically start at 30–50% and increase over time. Items are final-sale to clear inventory, so verify return policies before buying.
Percentage Calculator
Calculate any percentage, percent change, or what % one number is of another.
VAT Calculator
Add or remove VAT from prices at any rate for any country.
Tip Calculator
Calculate tip amounts and split bills among groups.
Margin Calculator
Calculate profit margin and markup for pricing decisions.
Cash Back Calculator
Find how much cash back you earn on every purchase.
Savings Calculator
See how your savings grow with interest over time.
Calculation method: Discount Amount = Original Price × (Discount% / 100). Sale Price = Original Price − Discount Amount. Effective Discount% = (Savings / Original Price) × 100. Results are rounded to two decimal places. Disclaimer: For informational purposes only. Actual prices and savings depend on retailer terms. Last updated: September 2026. Maintained by The Free Calculator Site.
Share your thoughts
Help us improve The Free Calculator Site