Discount Calculator
Calculate discount amount, final price after discount, and how much you save. Works with any percentage off.
What is Discount Calculator?
A discount calculator determines the final price after applying one or more percentage discounts, and shows how much money you save. It handles single discounts (30% off), sequential discounts (20% off then additional 10% off — which is NOT the same as 30% off), and calculates savings in both percentage and absolute terms. This is the tool shoppers reach for during sales events, coupon stacking, and when comparing deals across different stores to find the actual best price.
How It Works
Enter the original price and discount percentage. The tool calculates: discount amount = original price × (discount/100), and final price = original price - discount amount. For sequential (stacked) discounts, each discount is applied to the already-reduced price — so 20% off $100 = $80, then 10% off $80 = $72 (not $70 as simple addition would suggest). The tool clearly shows each step and the effective total discount percentage, helping you understand exactly what you're paying and saving.
Examples
£200 item, 30% off then a further 30% off
After first: £140.00 After second: £98.00 Total saving: 51%, not 60%
Tips & Best Practices
Sequential discounts multiply, they don't add. Two 30% discounts = 51% total discount, not 60%.
'Up to X% off' in retail usually means only select items get the maximum discount. Most items get much less.
To find the original price from a discounted price: divide by (1 - discount%). $70 after 30% off = $70 / 0.70 = $100.
Common Use Cases
- •Calculating final prices during sales to compare deals across different stores
- •Understanding the true savings when stores advertise 'additional X% off sale prices'
- •Figuring out the effective discount when stacking multiple coupon codes or promotions
- •Comparing percentage-off deals vs fixed-amount deals to determine which saves more
- •Calculating wholesale pricing tiers when different quantities get different discount levels
- •Understanding the real value of 'buy one get one 50% off' and similar promotional offers
Frequently Asked Questions
How do I calculate the final price?▼
Final price = Original price × (1 - discount/100). For example, $100 with 20% off = $80.
How do I find the original price from a sale price?▼
Divide the sale price by (1 − discount). An item at £70 after 30% off was £100, because 70 ÷ 0.70 = 100. Subtracting 30% from £70 gives £49, which is the most common mistake here.
Do stacked discounts add together?▼
No, they multiply. Two successive 30% discounts leave you paying 0.70 × 0.70 = 0.49 of the original, a 51% total reduction rather than 60%. The order does not matter to the final figure.
Is it better to get a discount before or after tax?▼
Before tax leaves you paying less overall, since the tax is then calculated on the reduced amount. Most jurisdictions require exactly that treatment for a straightforward price discount, so the retailer normally has no discretion.
What does "up to 70% off" usually mean in practice?▼
That at least one item carries the full 70% reduction. The majority of the range typically sits far below the headline figure, which is why the phrase is legal but uninformative. Compare the actual before and after prices rather than the advertised maximum.
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