How do I calculate a double discount (stacked discounts)?

Apply each discount sequentially, not by adding them. For 20% off then 10% off a $100 item: first discount gives $80, then 10% off $80 gives $72. This is less than a single 30% discount ($70).

Is a percentage off or fixed dollar off a better deal?

It depends on the price. Compare both: 20% off $50 saves $10, while a flat $15 off is better. Use this calculator to compare and choose the option that saves more.

What is the original price if I know the sale price and discount?

Divide the sale price by (1 - discount rate). If the sale price is $60 after a 25% discount: Original = $60 / (1 - 0.25) = $60 / 0.75 = $80.

Are Buy One Get One deals better than 50% off?

BOGO requires buying two items to get the savings, so you spend more total. If you only need one item, 50% off one item is the better deal. BOGO is only advantageous if you need multiple items.

How do I calculate the discount percentage from two prices?

Subtract the sale price from the original price, divide by the original price, and multiply by 100. If an item drops from $80 to $56: ($80 - $56) / $80 x 100 = 30% off.

Discount Calculator

Calculate sale prices, discount amounts, and total savings in seconds.

Discount Calculator

Original Price ($)

Discount (%)

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What Is a Discount Calculator?

A discount calculator takes the guesswork out of shopping. Whether you're eyeing a jacket marked 25% off, comparing competing store coupons, or trying to figure out how much you'll actually pay after stacking a promo code on top of a sale price, this tool does the math instantly. Just enter the original price and the discount percentage, and you'll see the exact sale price and how much you're saving.

Beyond retail shopping, discount calculators are just as useful for businesses. Wholesale buyers use them to evaluate supplier markdowns. Retailers use them to model margin impact before running a promotion. Knowing the true cost of a discount — not just the headline percentage — helps both shoppers and merchants make smarter pricing decisions. This calculator handles single discounts, stacked coupons, and reverse lookups (find what percentage you were charged).

How to Use This Calculator

1Enter the original price of the item before any discount is applied.
2Enter the discount percentage — for example, 25 for 25% off.
3If you have an additional coupon or second discount, enter that percentage in the stacked discount field.
4Click Calculate to instantly see the final sale price, total discount amount, and your total savings.

Discount Formulas

Discount Amount = Original Price × (Discount % / 100)
Sale Price      = Original Price − Discount Amount
Savings %       = (Discount Amount / Original Price) × 100

Stacked discounts (apply sequentially, NOT added):
Final Price = Original × (1 − D1/100) × (1 − D2/100)

Important: stacked discounts multiply, they do not add. A 20% discount followed by a 10% coupon is NOT 30% off — it is 28% off. Each discount applies to the already-reduced price, not the original.

Worked Examples

Example 1 — $120 jacket at 25% off

Discount Amount = $120 × (25 / 100) = $30. Sale Price = $120 − $30 = $90. You pay $90 and save $30.

Example 2 — $299 TV at 40% off with an extra 10% coupon (stacked)

Final Price = $299 × (1 − 0.40) × (1 − 0.10) = $299 × 0.60 × 0.90 = $161.46. Note: adding the discounts together would give 50% off ($149.50), which is wrong. Stacking correctly saves you $137.54, not $149.50.

Example 3 — Reverse lookup: you paid $63, original price was $90

Discount % = ((Original − Sale) / Original) × 100 = ((90 − 63) / 90) × 100 = (27 / 90) × 100 = 30%. You received a 30% discount.

Frequently Asked Questions

What is the difference between a discount and a markdown?▾

A discount is a temporary reduction offered to a customer — a sale, coupon, or promotional price. A markdown is a permanent price reduction, typically used in retail when a business lowers the everyday shelf price. Both reduce the amount you pay, but a markdown signals the new price is the baseline going forward, while a discount is typically time-limited.

How do BOGO deals work as a percentage discount?▾

Buy One Get One Free (BOGO) is equivalent to 50% off when you buy two items. If each item costs $40, you pay $40 for two items — that's $20 per item, or 50% off the per-unit price. Buy One Get One 50% Off works out to 25% off the total (you pay $40 + $20 = $60 for $80 worth of goods).

Is 50% off the same as buy one get one free?▾

Yes, mathematically they are equivalent when applied to the same item and quantity. Both result in you paying the price of one item for every two items you take home. However, BOGO requires you to buy two units, while 50% off applies to a single unit. If you only need one item, 50% off on one unit is better than BOGO.

How do I calculate the final price with tax after a discount?▾

Apply the discount first, then add tax to the sale price. For example: $100 item at 20% off = $80 sale price. With 8% sales tax: $80 × 1.08 = $86.40 final price. In most US states, sales tax is applied to the discounted price, not the original price — so taking the discount before tax is both mathematically correct and legally standard.

How do loyalty reward discounts work with percentage-off sales?▾

Loyalty discounts (like a 5% member discount) are typically stacked on top of sale prices, meaning they apply to the already-reduced price. If a $200 item is on sale for 30% off ($140), your 5% loyalty discount brings it to $140 × 0.95 = $133. The loyalty discount does not apply to the original $200 — it stacks sequentially, just like any other stacked coupon.