Discount Calculator

Calculate the sale price after a percentage or fixed discount. See your savings instantly.

Original Price ($)

Discount Percentage (%)(optional)

Enter percentage off (e.g. 30 for 30% off)

OR Discount Amount ($)(optional)

Enter a fixed dollar discount instead of a percentage

Results update as you type.

Final Price

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You Save—

Discount Percentage—

How it works

Discount calculators are essential for smart shopping. Whether you're looking at a '30% off' sale, a '$20 off coupon,' or trying to figure out if a deal is actually a deal, this calculator shows you the exact final price and how much you're saving. Retailers use percentage discounts most often because they scale with the original price and feel larger. A '30% off' sale on a $300 item saves $90 — but on a $30 item, that's only $9. Fixed dollar discounts ($20 off) work differently: they're a better deal on cheaper items (20% off a $100 item = $20) and a smaller deal on expensive items (4% off a $500 item = $20). When comparing deals, calculate the final price — not just the discount amount. A 50% off item from an inflated original price may not be cheaper than a 10% off from a fair retail price. Always compare final prices, not discount percentages.

Formula

Sale Price = Original Price × (1 − Discount%) ; Savings = Original − Final

Subtracting the discount rate from one leaves the fraction of the price you still pay, so multiplying the original price by that fraction lands directly on the sale price without a separate subtraction step. A fixed dollar discount is simpler still — it comes straight off the price — but it represents a different share of a cheap item than an expensive one, which is why the percentage method is applied first when both are supplied.

Source:Standard percentage discount

We review all our tools from time to time to ensure accuracy.

Worked example

Original Price ($):79.99Discount Percentage (%):25OR Discount Amount ($):0

25% off $79.99: Savings = $79.99 × 0.25 = $20.00. Final price = $79.99 − $20.00 = $59.99. The sale price rounds to $59.99.

How to use this calculator

1
Enter your values
Enter original price ($).
2
Adjust the options
Adjust discount percentage (%) and or discount amount ($) if they apply — sensible defaults are already set.
3
Read your result
Final Price updates instantly as you type — no button to press.

Frequently asked questions

How do I calculate a percentage off in my head?

For 10% off: move the decimal point one place left. $85 × 10% = $8.50 off. For 20% off: double the 10% amount. $8.50 × 2 = $17 off, so $85 − $17 = $68. For 25% off: divide by 4. $80 ÷ 4 = $20 off, so $60 final price. For 50% off: divide by 2. For 30% off: 3 × 10%. For 15% off: 10% + half of 10%. For 5% off: half of 10%. Combining these building blocks lets you calculate most common discounts mentally.

How do I find the original price if I know the sale price and discount?

Rearrange the discount formula: Original = Sale Price / (1 − Discount%/100). For example, a $70 item is already marked as 30% off. Original price = $70 / (1 − 0.30) = $70 / 0.70 = $100. This calculation is useful when a sale price is shown without the original, or when you want to verify that the 'original price' a retailer shows was legitimate and not inflated just to make the discount look bigger.

How do stacked discounts work?

Stacked discounts (multiple discounts applied sequentially) do NOT simply add together. A 20% off followed by an additional 10% off is NOT 30% off. It's: first reduce by 20%, then reduce the result by 10%. Example: $100 → 20% off = $80 → 10% off = $72. The combined effective discount is 28%, not 30%. Formula for two stacked discounts: Effective% = 1 − (1 − d1)(1 − d2). This is why a '20% off + extra 10% off' sale is slightly less valuable than a straight 30% off sale, even though it sounds the same.

Are sale prices always actually savings?

Not always. Retailers sometimes inflate the 'original price' to make the discount appear larger — a practice called price anchoring. Red flags: the item has been at the 'sale' price for months; the 'original' price is far above what any retailer charges; the item appears at the same 'sale' price across multiple retailers. Browser extensions like Honey, Capital One Shopping, and CamelCamelCamel (for Amazon) track price history so you can verify whether a 'sale' price is genuinely lower than the historical average. Seasonal sales (Black Friday, end-of-season clearance) typically offer real discounts.

How do I calculate the discount percentage if I know original and sale prices?

Discount% = (Original − Sale Price) / Original × 100. For example, an item originally $120, on sale for $84: Discount% = ($120 − $84) / $120 × 100 = $36 / $120 × 100 = 30% off. This is useful when a tag shows both prices but not the percentage, or when comparing discounts across different items. Note that the absolute savings ($36) and the percentage (30%) tell different stories — a $36 savings on a $120 item vs. a $36 savings on a $1,200 item represent very different discount levels (30% vs. 3%).