Calculate the discounted sale price, savings amount, and final price after US sales tax or UK VAT — instantly. Enter original price and discount percentage or discount amount.
Whether you are shopping the Black Friday sales in the United States, hunting Boxing Day deals in the United Kingdom, or comparing coupon discounts at the checkout — our percent off calculator gives you the exact sale price, savings amount, and final total after tax in seconds. Simply enter the original price and the percentage off (or flat discount amount), and optionally add your state's US sales tax or the standard UK VAT rate of 20%.
The formula for calculating a percentage discount is straightforward:
Example: 25% off a $120 item
You do not always have a calculator handy. Here are some quick mental math techniques:
The most common form. A percentage of the original price is subtracted. "25% off" on a $120 item saves exactly $30 regardless of whether it was marked up from $60 or marked down from $200.
"$20 off" coupons give a fixed saving regardless of price. This is better value on cheaper items (saving $20 on a $50 item is 40% off) and less impressive on expensive items ($20 off a $1,000 item is only 2% off).
BOGO free is effectively 50% off when you buy two items. BOGO 50% off is 25% off when you buy two. Always calculate the effective discount per item to compare deals accurately.
Cashback rewards (from credit cards or cashback sites) are effectively a delayed percentage-off. 5% cashback on a $200 purchase equals $10 back — but you pay the full price upfront.
In the United Kingdom, Value Added Tax (VAT) is applied to the discounted price — not the original price. This is important: if you buy a £100 item at 20% off for £80, the VAT (at 20%) is calculated on £80, not £100.
The standard UK VAT rate is 20%. Some goods are zero-rated (most food, children's clothing, books) and some are reduced-rated at 5% (domestic fuel, children's car seats). When shopping in a UK store with included VAT pricing, the tax is already embedded in the displayed price — the "inc. VAT" price includes the tax.
Our calculator handles UK VAT correctly: it applies the tax rate to the discounted price, not the original.
In the United States, sales tax is added to the sale price at the register. Tax rates vary dramatically by state: from 0% (Oregon, Montana, New Hampshire, Delaware, Alaska) to over 10% in combined state + local rates in some Tennessee and Louisiana jurisdictions.
Unlike UK VAT (which is always included in the displayed price), US sales tax is added at checkout. So a "$90 sale price" in a store with 8% sales tax actually costs $90 × 1.08 = $97.20 at the register.
Common US state sales tax rates: California 7.25% (base), Texas 6.25% (base), New York 4% (state) + up to 4.875% local, Florida 6%, Illinois 6.25% (base). Your total may include city and county additions.
Black Friday (the day after US Thanksgiving, late November) is the biggest shopping event in the United States. Average discounts across all categories typically run 20–40%, with electronics sometimes hitting 50–60% off.
In the United Kingdom, Boxing Day (December 26th) is the traditional start of major post-Christmas sales. UK retailers typically offer 30–60% off in the days following Christmas. The January sales that follow can extend deals for several weeks.
In both countries, understanding the actual discount on an item — and the final price after tax — is essential to compare deals across stores. Our percent off calculator makes this comparison instant.
Retailers apply a markup to their wholesale cost to set the selling price. A 50% markup means the item is priced at 150% of cost. This is very different from a 50% margin (profit as a percentage of selling price).
When a retailer offers "50% off," they may still be making a profit if the original markup was large. The original price may reflect a high margin that leaves room to discount significantly while remaining profitable. This is particularly common in fashion retail and furniture.
Sale Price = Original Price × (1 − Discount%/100). For 25% off a $120 item: $120 × 0.75 = $90. Alternatively: Discount = $120 × 0.25 = $30; Sale Price = $120 − $30 = $90.
UK VAT is applied to the discounted price. On a £100 item at 20% off, you pay £80 plus VAT on £80 (= £16 VAT), totalling £96 — not £100 + VAT.
BOGO free and 50% off are mathematically identical when buying exactly two items. Both result in paying for one and getting one free. For more than two items, 50% off every item is better than BOGO free (where only every other item is free).
Coupons typically cannot be "stacked" (applied simultaneously) unless the store explicitly allows it. If two coupons can be stacked: apply one first, then the second to the already-discounted price. A 20% off coupon followed by a 10% off coupon gives 28% total off, not 30%: 0.80 × 0.90 = 0.72, so 28% total saving.
Sales tax is applied to the sale price (after discount), not the original price. On a $90 sale item in a state with 8% tax: $90 × 1.08 = $97.20. You pay tax on what you actually spend.
Percentage Off = (Original Price − Sale Price) / Original Price × 100. If something was $120 and is now $90: (120−90)/120 × 100 = 25% off.
True Black Friday discounts of 30% or more on the genuine regular price are considered good. Watch for "fake" discounts where the pre-sale price was artificially inflated. Use price tracking tools to verify that the sale price is genuinely lower than it has been over the past 90 days.
Yes. Original Price = Sale Price / (1 − Discount%/100). If an item costs $90 after 25% off: $90 / (1 − 0.25) = $90 / 0.75 = $120 original price.
Results are estimates for educational purposes. US sales tax rates vary by state and locality. UK VAT rates vary by product category. Verify with official sources before making financial decisions.