Discount Calculator — Free Sale Price Calculator
Work out any discount in seconds — the sale price, how much you save, the discount percentage, the original price, or discount plus tax. Free, instant, no sign-up.
✦ Free forever • No sign-up • Exact maths • 5 calculators
◆Sale price after a discount
Type the original price and the discount percentage — get the final sale price and how much you save.
Example:
◆How much do I save?
Type the original price and the discount percentage — see exactly how much money stays in your pocket.
Example:
◆Discount percentage from two prices
Type the original price and the sale price — find out what percentage off the item really is.
Example:
◆Original price from sale price
Type the sale price and the discount percentage — work backwards to the price before the discount.
Example:
◆Discount + tax combined
Type the price, the discount and the tax rate — the discount comes first, then tax on the discounted price, exactly like a real shop.
Example:
How to calculate a discount
Three steps: type the original price, type the discount percentage, press Calculate. The result shows the sale price, the amount saved and the formula used, so you can check it yourself. Read the full step-by-step guide with worked examples →
Why use this discount calculator?
✓ Exact sale prices
Every answer is worked out to the cent, with the formula shown — for example, $80 at 25% off is $80 x 0.75 = $60.00, and you save $20.00. No guessing, no rounding surprises.
✓ Five calculators in one
Sale price, amount saved, discount percentage, original price and discount plus tax — every version of the discount question, answered on one page.
✓ Discount first, then tax
The discount-plus-tax calculator applies the discount first and charges tax on the discounted price — $100 at 10% off plus 8% tax is $97.20 — exactly how real shops work.
✓ Work backwards too
Only know the sale price? The reverse calculator finds the original price: $60 at 25% off was $80.00 before the discount.
✓ Free forever
No account, no sign-up, no limits, no fees. Calculate as many discounts as you like, on any device.
✓ Nothing is stored
Your prices never leave your browser. Every calculation happens on your own device — nothing is sent to any server.
Guides — calculate discounts with confidence
◆ How to Calculate a Discount
Find the sale price, the amount saved, the discount percentage and the original price — with worked examples, the discount-plus-tax order, and the five mistakes that cost people money.
◆ Try the calculators above
All five calculators are free and instant — sale price, savings, discount percentage, original price and discount plus tax, each with a worked example you can tap to try.
Calculate any discount, free
A discount looks simple until you are standing in a shop trying to work out whether 25% off $80 is really a good deal — it is $60, and you save $20. This free discount calculator answers every version of that question in seconds: the sale price after a discount, how much money you save, the discount percentage between an original price and a sale price, the original price behind a sale price, and the final price when discount and tax are combined. Every answer shows the formula it used, so you can check the maths yourself.
Everything is free and nothing is stored: no sign-up, no install, no account. All five calculators run in your browser — your prices are never sent to any server. Discounts are calculated exactly, to the cent, and the discount-plus-tax calculator always applies the discount first and then charges tax on the discounted price, which is how shops really work. For step-by-step help with worked examples, read the free guide on how to calculate a discount.
Frequently asked questions
How do I calculate a discount?
Take the original price and multiply it by the discount percentage, then subtract that amount from the original price. For example, 25% off an $80 item is $80 x 25% = $20 off, so the sale price is $80 - $20 = $60. The calculator on this page does it for you — type the price and the percentage and press Calculate.
What is the formula for the sale price?
Sale price = original price x (1 - discount % / 100). For example, $80 at 25% off is $80 x (1 - 0.25) = $80 x 0.75 = $60.00. The amount you save is original price x discount % / 100, which is $80 x 0.25 = $20.00.
How do I find the discount percentage from two prices?
Discount % = (original price - sale price) / original price x 100. For example, an item reduced from $80 to $60 is ($80 - $60) / $80 x 100 = $20 / $80 x 100 = 25% off. Use the third calculator on this page — type both prices and it shows the percentage.
How do I find the original price from a sale price?
Original price = sale price / (1 - discount % / 100). For example, a $60 sale price at 25% off means the original price was $60 / (1 - 0.25) = $60 / 0.75 = $80.00. Use the fourth calculator on this page for this reverse calculation.
Is tax added before or after the discount?
In almost every shop, the discount comes first and tax is charged on the discounted price. For example, a $100 item at 10% off is $90, and then 8% tax on $90 is $7.20, so you pay $97.20 in total. The fifth calculator on this page uses exactly this order — discount first, then tax.
Is this discount calculator really free?
Yes. Discount Calculator is 100% free. There is no account, no sign-up, no limit and no fee — calculate as many discounts as you like, on any device. Your numbers never leave your browser.
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