Calculate sale prices, savings amounts, and discount percentages instantly. Shop smarter with accurate calculations.
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Calculate Your Discount
Enter the original price and discount to find your savings and final price.
You Save
Final Price
Find the Discount Percentage
Know the original and sale price? Find out the discount percentage.
Discount Percentage
What is a Discount Calculator?
A discount calculator helps you quickly determine the final price after a percentage discount is applied. Whether browsing online sales, comparing deals at stores, or planning your shopping budget, this calculator provides instant, accurate results for informed purchasing decisions.
How Discounts Are Calculated
Calculating Savings
Savings = Original Price × (Discount % ÷ 100)
Final Price = Original Price - Savings
Example: A $80 jacket is 30% off.
Savings = $80 × 0.30 = $24
Final Price = $80 - $24 = $56
Finding the Discount Percentage
Discount % = ((Original - Sale) ÷ Original) × 100
Example: A TV was $500, now $375. What's the discount?
Discount = (($500 - $375) ÷ $500) × 100 = 25% off
Understanding Double Discounts
When stores offer "30% off plus additional 20% off," the total is NOT 50%:
$100 item with "30% + 20%":
After 30%: $100 - $30 = $70
After 20% of $70: $70 - $14 = $56
Actual discount: 44% (not 50%!)
Smart Shopping Tips
Compare unit prices — bigger isn't always better value
Check original prices — some retailers inflate them before sales
Set a budget before shopping to avoid impulse purchases
Stack discounts: coupons + sale prices + loyalty points
Frequently Asked Questions
Not necessarily. A 50% discount on an overpriced item might cost more than 20% off a fairly priced competitor. Compare final prices, not just percentages.
Our calculator shows the discounted price before tax. Use our VAT calculator to add tax to your discounted price.
A discount calculator works out the final price after a percentage reduction, along with the amount saved. It also handles the awkward cases: stacked discounts applied one after another, reversing a sale price back to the original, and comparing offers presented in different formats. Retail pricing is deliberately structured to be difficult to compare at a glance, which is exactly why calculating it is worthwhile.
How to Use This Discount Calculator
Enter the original price.The pre-discount figure, before any reduction is applied.
Enter the discount percentage.Just the number, such as 25 for 25 percent off.
Read the final price and saving.You get both the amount you pay and the amount you save.
The Formulas
Saving = Original Price x (discount % / 100) Final Price = Original Price - Saving
One-step method: Final Price = Original x (1 - discount as decimal)
For 30% off: Final = Original x 0.70
Reverse: Original = Final Price / (1 - discount as decimal)
Worked Example
A jacket priced at 180 with 35 percent off
Method 1: Calculate the saving, then subtract
Saving = 180 x 0.35 = 63
Final price = 180 - 63 = 117
Method 2: One step
Final price = 180 x (1 - 0.35)
Final price = 180 x 0.65 = 117
You pay 117 and save 63
Why Stacked Discounts Disappoint
A sign reading "30% off, plus an extra 20% off at the till" does not give 50 percent off. Each discount applies in sequence to a progressively smaller number.
An item at 200, with 30 percent off then a further 20 percent
After first discount: 200 x 0.70 = 140
After second discount: 140 x 0.80 = 112
Combined multiplier: 0.70 x 0.80 = 0.56
Actual total discount: 44%, not 50%
You pay 112, an effective 44 percent off — six percentage points less than the headline suggests
The order does not matter
Applying 30 percent then 20 percent gives the same result as 20 percent then 30 percent, because multiplication is commutative. What matters is that the discounts multiply rather than add. Two 50 percent discounts give 75 percent off, not 100 percent, which is a useful thing to remember before assuming something is free.
Common Discounts at a Glance
Discount
Multiply By
Price of 100 becomes
10% off
0.90
90
15% off
0.85
85
25% off
0.75
75
33% off
0.67
67
40% off
0.60
60
50% off
0.50
50
70% off
0.30
30
Comparing Offers in Different Formats
Retailers present discounts in formats that resist direct comparison. Converting everything to an effective percentage makes them comparable.
Offer
Effective Discount
Condition
Buy one get one free
50%
Must buy 2
Buy two get one free
33.3%
Must buy 3
Buy three get one free
25%
Must buy 4
Second item half price
25%
Must buy 2
20 off when you spend 100
20%
Only at exactly 100
A discount on something you did not need is not a saving
Buy-one-get-one-free offers only deliver their headline discount if you genuinely wanted two. Spending 100 to unlock a 20 discount when you intended to spend 60 means you spent 40 more, not saved 20. The arithmetic of the offer is correct; the arithmetic of your budget is what matters.
Discount and Tax Together
When both apply, the discount comes first and tax is calculated on the reduced amount.
An item at 250, with 20 percent off and 8 percent sales tax
After discount: 250 x 0.80 = 200
Tax on the discounted price: 200 x 0.08 = 16
Total to pay: 200 + 16 = 216
Total is 216 — tax is charged on what you actually pay, not the original price
People Also Ask
Multiply the original price by the discount percentage as a decimal to find the saving, then subtract it from the original price. A quicker route is to multiply the original price by one minus the discount: for 30 percent off, multiply by 0.70 to get the final price directly.
Stacked discounts apply one after another, not added together. A 20 percent discount followed by another 10 percent is not 30 percent off. The second discount applies to the already-reduced price, giving a combined 28 percent. The multiplier method makes this clear: 0.80 times 0.90 equals 0.72.
Divide the sale price by one minus the discount as a decimal. An item on sale for 63 after 30 percent off had an original price of 63 divided by 0.70, which is 90. This is the same reversal logic used when removing VAT from a gross price.
Only if you buy exactly two items. Across two items the effective discount is 50 percent, but you must purchase both to get it. Buy-two-get-one-free works out to 33.3 percent off across three items. These offers are structured to increase the quantity purchased, which is precisely why they are framed that way.
Apply the discount first, then add tax to the reduced price. Tax is normally charged on the amount actually paid, not the pre-discount price. Reversing the order overstates the tax owed, though rules can differ for certain kinds of promotional discounts in some jurisdictions.
This calculator is provided for general information. Retailer terms, tax treatment of discounts and promotional rules vary by jurisdiction and merchant.