How do I calculate a percentage discount?

To calculate a percentage discount, multiply the original price by the discount percentage and divide by 100. That gives you the discount amount. Then subtract it from the original price to get the sale price. For example, a 20% discount on a $50 item: $50 × 20 ÷ 100 = $10 saved. Final price = $50 − $10 = $40.

How do I find the original price if I only know the sale price?

Divide the sale price by (1 minus the discount rate as a decimal). For example, if the sale price is $80 after a 20% discount: $80 ÷ (1 − 0.20) = $80 ÷ 0.80 = $100 original price. This reverse discount formula works for any percentage off.

What is the difference between percent off and dollar off?

Percent off means the discount scales with the price — 20% off a $200 item saves $40, but 20% off a $50 item only saves $10. Dollar off is a flat fixed amount — $10 off saves the same $10 regardless of the original price. Percent off is more common in retail sales and seasonal markdowns. Dollar off is common with coupons and loyalty rewards.

How do I calculate savings on multiple items with different discounts?

Calculate the discount amount and sale price for each item separately, then add the sale prices together for the cart total. Add the individual savings amounts to find total savings. Our multi-item discount tool lets you enter several items at once and see the combined total, total saved, and overall effective discount rate across your whole cart.

Does the discount apply before or after tax?

In most stores and countries, discounts apply to the pre-tax price. Tax is then calculated on the discounted sale price, not the original price. This means a lower price also means less tax to pay. Our calculator lets you add a tax rate after the discount to see your true checkout total including tax.

Discount Calculator – Sale Price, Savings Amount & Percent Off

Discount Calculator

Enter an original price and percent off to instantly find the sale price, money saved, and final checkout total — free and works in any currency.

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Instant results

Mobile friendly

100% free

Works globally

Enter Discount Details

Original Price ($)

Discount (%)

Enter 0–100 for a percent off

Currency Symbol

Quantity

Number of items at this price

Tax Rate (%)

Applied after the discount

Additional $ Off

Fixed coupon or loyalty reward

Calculation Mode

Your Savings Breakdown

Enter a price and discount above, then click Calculate to see your savings.

You Pay

—

saving — off the original price

Full Breakdown

Original Price —

Discount Amount —

Discount Rate —

Extra $ Off —

Tax (—%) —

Total with Tax —

Total for — items —

Cart Total (all items) —

Total Cart Savings —

2nd Stacked Discount —

Shipping / Handling —

Loyalty Points —

Grand Total —

vs. Competitor Price —

Price Breakdown

Original vs Sale Price

How Discount Calculation Works

A discount reduces the price you pay below the original listed price. The most common type is a percentage off — like 20% off or 50% off. You multiply the original price by the discount rate to find how much money you save. Then you subtract that from the original price to get the sale price.

Some stores also use a flat dollar off coupon, like $10 off your order. You can combine both types — for example, 15% off plus an extra $5 voucher. Our calculator supports both and applies them in order.

If you need to find the original price when you only know the sale price, you can use the reverse discount mode. And if you want to know what percentage you are already getting, use the find % off mode.

Discount Formula

The math behind every discount:

Savings = Original Price × (Discount % ÷ 100)
Sale Price = Original Price − Savings
Sale Price (shortcut) = Original × (1 − Discount% ÷ 100)
Original (reverse) = Sale Price ÷ (1 − Discount% ÷ 100)
% Off (from both prices) = (Savings ÷ Original) × 100

Example: $120 original, 30% off. Savings = $36. Sale price = $84. With 8% tax on the sale price: tax = $6.72. You pay $90.72 at checkout.

Quick Reference – Sale Prices

Original Price	10% Off	20% Off	30% Off	50% Off	70% Off
$10	$9.00	$8.00	$7.00	$5.00	$3.00
$25	$22.50	$20.00	$17.50	$12.50	$7.50
$50	$45.00	$40.00	$35.00	$25.00	$15.00
$100	$90.00	$80.00	$70.00	$50.00	$30.00
$200	$180.00	$160.00	$140.00	$100.00	$60.00
$500	$450.00	$400.00	$350.00	$250.00	$150.00

Types of Discounts Explained

Not all discounts work the same way. Here are the most common types:

Percentage off: The most common type. A fixed percentage is removed from the original price. The higher the original price, the more you save in absolute terms.
Flat dollar off: A fixed amount is deducted regardless of the original price. Great when you have a store coupon.
Buy X get Y free: You pay for a set number and get extra items at no cost. Works out as a percentage off the total package.
Cashback: You pay full price and receive a portion back later via app, card, or rebate. The final saving is the same mathematically.
Bundle discount: Buying multiple items together at a lower combined price than buying separately.

Frequently Asked Questions

Multiply the original price by the discount percentage and divide by 100 to get the discount amount. Then subtract it from the original price. Example: $80 with 25% off — $80 × 25 ÷ 100 = $20 saved. You pay $80 − $20 = $60. A quick shortcut: multiply by (1 − discount/100). So $80 × 0.75 = $60 directly.

It depends on the product category. For everyday retail items like clothing, 20–40% off is a solid deal. For electronics, even 10–15% off can be significant given high prices. Black Friday and end-of-season sales often offer 40–70% off. Grocery markdowns are usually 10–30%. Anything above 50% on a quality product is generally considered an excellent deal. Always compare to the item's normal selling price, not an inflated "original" price.

Stacked discounts apply one after another, not added together. A 20% off followed by an extra 10% off is not the same as 30% off. The second discount applies to the already-reduced price. So on a $100 item: 20% off = $80. Then 10% off $80 = $72. That is 28% total savings, not 30%. Our Advanced Options let you stack a percentage off and a flat coupon in one calculation.

In most places, sales tax is applied to the discounted price, not the original price. So a 20% discount also lowers the tax you pay. For example, a $100 item at 20% off has a sale price of $80. With 10% tax: tax = $8, checkout total = $88. Without the discount, you would pay $10 in tax. Our calculator applies tax to the post-discount price by default.

Subtract the sale price from the original price to find the savings. Then divide savings by the original price and multiply by 100. Example: original $120, sale price $90. Savings = $30. Percentage off = (30 ÷ 120) × 100 = 25%. Use our "Find % Off from Both Prices" mode in Advanced Options to do this automatically.

A reverse discount finds the original price when you only know the sale price and the discount percentage. The formula is: Original = Sale Price ÷ (1 − Discount% ÷ 100). For example, if a jacket costs $60 after 40% off, the original price was $60 ÷ 0.60 = $100. This is useful when a shop shows only the sale price on a tag. Use the "Sale Price → Find Original" mode in Advanced Options.

Sale Prices by Original Price & Discount %

What you pay after each discount. Currency: $

Original Price	5% Off	10% Off	15% Off	20% Off	25% Off	30% Off	40% Off	50% Off

Sale Price = Original × (1 − Discount% ÷ 100). Currency: $

Savings Amount by Price & Discount %

How much money you save in $ at each price and discount combination.

Original Price	5% Off	10% Off	20% Off	30% Off	40% Off	50% Off	70% Off

Savings = Original Price × Discount% ÷ 100.

Checkout Total After Discount + Tax

What you actually pay at checkout with a 20% discount and different tax rates. Currency: $

Original Price	Sale Price20% off	+ 5% Tax	+ 8% Tax	+ 10% Tax	+ 13% Tax	+ 15% Tax	+ 20% Tax

Tax is applied to the sale price (post-discount). Sale price = Original × 0.80 for a 20% discount.

Total Savings by Quantity & Discount

How much you save in total when buying multiple units at a discounted price. Currency: $

Unit Price	Qty × 2	Qty × 3	Qty × 5	Qty × 10	Discount	Total Saved

Assumes a 20% discount on the unit price. Total Saved = Unit Savings × Quantity.

Stacked Discount Results

Effective saving when two percentage discounts are applied one after another (not added). Currency: $

First Discount	+ 5% Extra	+ 10% Extra	+ 15% Extra	+ 20% Extra	+ 25% Extra	Combined % Off

Stacked % ≠ sum of both. Combined = 1 − (1 − D1)(1 − D2). Based on a $100 starting price.

Original Price from Sale Price & Discount %

Find what the original price was given a known sale price and discount. Currency: $

Sale Price	10% Off originally	15% Off	20% Off	25% Off	30% Off	40% Off	50% Off

Original Price = Sale Price ÷ (1 − Discount% ÷ 100).