Discount Calculator: sale price and savings, instantly
Type a price and a percent off to see the sale price and exactly what you save find the % off from two prices, stack two discounts, or add sales tax, in any currency.
How a discount is calculated (and the shortcut that saves you the arithmetic)
Every discount is two small steps: work out how much comes off, then take it away. Once you see it written down, you can do most of them in your head.
The formula behind every sale tag
Say a jacket is priced at $80 with 25% off. Twenty-five percent of 80 is $20, so you save $20 and pay $60. That’s the whole calculation the tool just does it instantly and to the exact cent.
The one-step shortcut
Paying after 25% off means paying the other 75%, so $80 × 0.75 lands straight on $60. To take any percentage off in one move, subtract it from 100, turn that into a decimal, and multiply: 20% off is × 0.80, 30% off is × 0.70, 40% off is × 0.60.
Quick trick: only know 10%? Move the decimal one place left. 10% of $46.90 is $4.69. Double it for 20%, halve it for 5% most real-world discounts are just 10% scaled up or down.
Work out any discount in four steps
The same method covers a Black Friday price tag, a stacked coupon code, or a store owner marking down last season’s stock.
Enter the price
Type the full, pre-discount price into the original price box and choose your currency dollars, pounds, euros, rupees or none.
Enter the percent off
Type the discount as a number: 25 for 25% off. Or switch to Find % off and enter what you actually paid to reveal the rate.
Read your price and savings
See the sale price big and bold, plus the exact amount you save and the breakdown behind it no rounding surprises.
Add tax or a second discount
Flip on sales tax to see the real checkout total, or use Stack 2 to apply a second coupon and reveal the true combined rate.
How much is 10%, 20% or 30% off? The percent-off chart
Here’s what each discount does to a $100 price the savings and the sale price side by side. Every row scales: for a $50 item, halve the numbers; for a $200 item, double them. Tap a rate to drop it into the calculator.
| Discount | You save on $100 | You pay on $100 | Multiply price by |
|---|---|---|---|
| 5% off | $5.00 | $95.00 | 0.95 |
| 10% off | $10.00 | $90.00 | 0.90 |
| 15% off | $15.00 | $85.00 | 0.85 |
| 20% off | $20.00 | $80.00 | 0.80 |
| 25% off | $25.00 | $75.00 | 0.75 |
| 30% off | $30.00 | $70.00 | 0.70 |
| 33% off | $33.00 | $67.00 | 0.67 |
| 40% off | $40.00 | $60.00 | 0.60 |
| 50% off | $50.00 | $50.00 | 0.50 |
| 60% off | $60.00 | $40.00 | 0.40 |
| 70% off | $70.00 | $30.00 | 0.30 |
| 75% off | $75.00 | $25.00 | 0.25 |
| 80% off | $80.00 | $20.00 | 0.20 |
To go the other way turning “you save” into a percentage subtract the sale price from the original, divide by the original, and multiply by 100. The Find % off mode does exactly this in one tap.
Reverse discounts and prices with tax
Two everyday cases the basic formula skips: finding the discount when you only know the prices, and knowing what you’ll actually hand over once tax is added at the till.
Find the percentage off from two prices
You spot a $60 price on something that was $80 and want to know the deal. You saved $20; $20 ÷ $80 is 0.25, so it’s 25% off. This is how you compare a “40% off” banner against a plain marked-down price and see which is truly cheaper.
Discount before tax, tax after
Sales tax is added after the discount, on the reduced price never before. On that $60 sale price, an 8% tax adds $4.80, so you pay $64.80 at the register. Toggle tax on and the calculator shows the discounted subtotal and the final total separately, so there are no surprises.
Worth knowing: a percent-off coupon and a tax rate never cancel out. “20% off” then “+8% tax” leaves you paying about 86% of the original, not the original the discount is always the bigger lever.
Why 20% + 10% off is really 28%, not 30%
The most expensive misunderstanding in couponing. When two discounts stack, the second one comes off the already reduced price so they never simply add up.
Discounts apply one after another
Start with a $100 item. Take 20% off and you’re at $80. Now the 10% off applies to that $80, not the original $100 — so it removes $8, landing you at $72. You’ve saved $28 total, which is a true discount of 28%.
The gap grows with bigger numbers: 50% then 50% off is 75%, not a free item. And the order doesn’t matter 10% then 20% lands on the exact same $72. Switch to Stack 2 mode and the tool shows the real combined rate every time.
Retailers know this: “extra 20% off sale prices” reads like a huge cut, but on a rack already at 30% off it’s a combined 44% generous, yet a long way from the 50% your eye adds up to.
One calculator, every kind of deal
Run your numbers, then let each of these jump you straight back to the tool with the right mode ready.
Sale & Black Friday shopping
See the real price behind a “40% off” tag before you commit, and compare two deals apples to apples instead of trusting the biggest number.
Take a percent off →Stacking coupons & codes
Layer a store sale with a promo code and see the true combined rate so you know whether “extra 15% off” is worth the checkout hassle.
Stack two discounts →Retail & markdown pricing
Marking down old stock? Work backwards from the sale price you want to the ticket price, and keep your margin in view while you cut.
Find the % off →Budgeting the real total
Add your local sales tax to the discounted price and see the exact amount leaving your account — the number that actually matters.
Add tax to a price →Other free calculators
No sign-up, no limits they run right in your browser.
Discount questions, answered
How is a 20% discount calculated?
How do I take 20% off a price?
How much is 10% off?
How do you make a 30% discount?
How do I find the percentage off from two prices?
Is 20% off plus 10% off the same as 30% off?
Is tax added before or after the discount?
Does this discount calculator work in rupees, pounds or euros?
Stop guessing what you’ll actually pay
Enter a price and a percent off see the sale price, your savings, and the real total with tax or a stacked coupon. One tap, exact to the cent.
This discount calculator is a free planning tool. Results are rounded to two decimal places and assume sales tax is applied to the discounted price, which is standard in most regions your local rules and rounding may differ slightly at checkout. Stacked-discount results apply each rate in sequence. Always confirm the final figure against your receipt or point-of-sale total.