💰 Finance & Math
Discount Calculator
Find sale price, savings amount, or reverse-calculate what discount was applied.
How the Discount Calculator works
Two modes in one tool. Price → Sale Price: enter original price and discount percentage to get the sale price and exact savings. Find Discount %: enter both the original and sale price to work out what percentage discount was applied. Useful when comparing deals, checking advertised savings, or planning budgets during sales season.
Frequently Asked Questions
How do I calculate a 20% discount?
Multiply the original price by 0.20 to get the discount amount, then subtract from the original. For example: $80 × 0.20 = $16 discount, so the sale price = $80 − $16 = $64. The Discount Calculator above does this instantly.
What is the formula for a discounted price?
Sale Price = Original Price × (1 − Discount% ÷ 100). For a 30% discount on $100: $100 × (1 − 0.30) = $100 × 0.70 = $70.
How do I find the discount percentage from original and sale price?
Use the "Find Discount %" tab. The formula is: Discount % = ((Original − Sale) ÷ Original) × 100. For example, $120 original and $90 sale: ((120 − 90) ÷ 120) × 100 = 25%.
What does 50% off mean?
50% off means the item costs half its original price. You save exactly half the original amount — a $200 item at 50% off costs $100.
How do stacked discounts work?
Stacked discounts apply sequentially, not together. Two 20% discounts ≠ 40% off. A $100 item: first 20% off → $80, then another 20% off → $64. The combined effective discount is 36%, not 40%.
Is this discount calculator free?
Yes — the Discount Calculator on Potential Daily is completely free with no sign-up required. All calculations run in your browser.