Discount Calculator — Calculate Sale Price & Savings
Calculate sale prices and savings from discount percentages. Find original price from discounted price. Supports multiple discounts. Browser-based.
Features
- ✓Calculate sale price from original price and discount
- ✓Find original price from sale price and discount
- ✓Calculate discount percentage from original and sale price
- ✓Show savings amount clearly
- ✓Support for multiple discount scenarios
- ✓Instant calculation as you type
- ✓Perfect for shopping and retail
- ✓Works for any currency
- ✓Helps verify advertised discounts
- ✓All calculations run locally in your browser
How to Use
- 1Choose what you want to calculate.
- 2Enter the known values (prices or percentages).
- 3View instant results showing all prices.
- 4See the savings amount highlighted.
- 5Switch between calculation modes as needed.
- 6Use the 'Find Sale Price' mode when shopping during sales events.
- 7Use 'Find Original Price' to verify claimed discounts on marketplace listings.
- 8Use 'Find Discount Percentage' to compare deals across different stores.
Frequently Asked Questions
How do I calculate the sale price?
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Sale price = Original price × (1 - Discount%/100). For example, $100 with 20% off: $100 × 0.80 = $80. The discount amount is $100 - $80 = $20.
How do I find the original price from a sale price?
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Original price = Sale price / (1 - Discount%/100). For example, if $80 is 20% off: $80 / 0.80 = $100. This is useful when you see a sale price and want to know the original.
How do I calculate the discount percentage?
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Discount% = ((Original - Sale price) / Original) × 100. For example, from $100 to $75: ((100-75)/100) × 100 = 25% discount.
How do multiple discounts work?
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For multiple discounts, apply them sequentially. For example, 20% off then 10% off: First discount: $100 × 0.80 = $80. Second discount: $80 × 0.90 = $72. Total discount is 28%, not 30%.
Why verify advertised discounts?
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Sometimes advertised 'original prices' are inflated to make discounts look bigger. Use this calculator to check if the math adds up. If a $75 item is advertised as 30% off from $100, but $100 × 0.70 = $70, the discount is actually 25%.
Is my shopping data sent to a server?
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No. All calculations happen entirely in your browser using JavaScript. Your prices and discount information are never transmitted over the network.
How do stackable coupons work with discounts?
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Stackable coupons are applied after the initial discount. For example, a 20% off sale plus a 10% off coupon: first apply 20% ($100 × 0.8 = $80), then apply 10% ($80 × 0.9 = $72). The total discount is 28%, not 30%. Always apply percentage-based coupons after fixed discounts for maximum savings.
What is a 'buy one get one free' in percentage terms?
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Buy One Get One Free (BOGO) is equivalent to a 50% discount on the total purchase when buying two identical items. Buy Two Get One Free equals approximately 33% off. This calculator can help you compare BOGO offers against straight percentage discounts to see which gives better value.
How do I calculate tax on a discounted price?
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First calculate the discounted price using this tool, then apply tax to that result. For example, $100 with 20% off = $80 sale price. If tax is 8%, the final price = $80 × 1.08 = $86.40. Some regions calculate tax before discount — check your local tax rules.
How do I calculate a 50% off + extra 10% off promotion?
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Apply discounts sequentially. First discount: original × 0.50. Second discount: result × 0.90. For $100: 100 × 0.50 = $50, then $50 × 0.90 = $45. Total savings: $55 (55% off, not 60% off). Apply percentage discounts before fixed-amount coupons for maximum savings.
What is the difference between 'up to 50% off' and '50% off'?
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'Up to 50% off' means some items get lower discounts (10%, 20%, 30%) while select items get 50%. '50% off' means every item in the promotion is half price. Retailers use 'up to' to attract customers while protecting margins. Always check which items qualify for the maximum discount.
How do I calculate whether a bulk discount is worth it?
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Calculate the per-unit cost after discount and compare to the regular per-unit cost. For example, 'buy 3 get 1 free' on items costing $10 each: 4 items for $30 = $7.50 each (25% discount per item). Compare this to a straight 20% off ($8 each) — the BOGO deal is better. Use this calculator to model different scenarios.
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