Discount calculator
Enter the original price and the percentage off to see the sale price and how much you save. Stack a second discount, add sales tax, or enter two prices to find the discount percentage.
The price before any discount.
Common discounts
For an extra % off at checkout, a coupon on a sale item, or a member discount.
Added to the sale price.
- Original price
- $80.00
- 25% off
- −$20.00
- Sale price
- $60.00
- You save
- $20.00
Other discounts on $80.00
- 10% off (save $8.00)
- $72.00
- 20% off (save $16.00)
- $64.00
- 25% off (save $20.00)
- $60.00
- 30% off (save $24.00)
- $56.00
- 40% off (save $32.00)
- $48.00
- 50% off (save $40.00)
- $40.00
- 60% off (save $48.00)
- $32.00
- 70% off (save $56.00)
- $24.00
- Nothing is uploaded
- Free, no sign-up
- Works on phone and desktop
How to calculate a discount
- 1
Enter the original price and the percentage off, or tap a common discount such as 20% or 30%.
- 2
Got an extra coupon on top? Turn on Add a second discount. It comes off the already reduced price.
- 3
Add your sales tax rate to see the total you will pay at the register.
- 4
Know the old and new prices? Choose Find the % off to see how big the discount really is.
Features
Stacked discounts
See what 30% off plus an extra 20% really comes to: 44% off, not 50%.
Sales tax included
Add your local rate to see the total at the register, worked out on the discounted price.
One-tap discounts
Common discounts from 10% to 75% off are one tap away, with a price list for the rest.
Check a deal
Enter the original and sale prices to see the real percentage off, or spot a price that went up.
The discount formulas
- Amount saved = original price × percent off ÷ 100
- Sale price = original price × (1 − percent off ÷ 100)
- Percent off = (original price − sale price) ÷ original price × 100
- Two discounts together = 1 − (1 − first) × (1 − second)
What you pay at common discounts
| Discount | Multiply the price by | $50 item | $100 item |
|---|---|---|---|
| 10% off | 0.90 | $45.00 | $90.00 |
| 15% off | 0.85 | $42.50 | $85.00 |
| 20% off | 0.80 | $40.00 | $80.00 |
| 25% off | 0.75 | $37.50 | $75.00 |
| 30% off | 0.70 | $35.00 | $70.00 |
| 40% off | 0.60 | $30.00 | $60.00 |
| 50% off | 0.50 | $25.00 | $50.00 |
| 60% off | 0.40 | $20.00 | $40.00 |
| 70% off | 0.30 | $15.00 | $30.00 |
| 75% off | 0.25 | $12.50 | $25.00 |
Worked examples
- One discount: a $129.99 jacket at 30% off costs $90.99. You save $39.
- Sale price plus a coupon: $64 shoes are 40% off, and a coupon takes another 15% off at checkout. The first discount brings them to $38.40, the coupon takes off another $5.76, and you pay $32.64. That's 49% off in total, not 55%.
- With sales tax: a $1,199 laptop at 15% off is $1,019.15. With 7% sales tax on the sale price ($71.34), the total at the register is $1,090.49.
- Was and now: a sofa marked down from $250 to $175 is 30% off. Use Find the % off to check any price tag.
Why stacked discounts are smaller than they look
When a store offers "an extra 20% off sale prices", the extra discount applies to the price that's already been cut. Each discount shrinks the amount the next one works on, so two discounts always add up to less than their sum.
| First discount | Then | Total off |
|---|---|---|
| 20% | 10% | 28% |
| 25% | 10% | 32.5% |
| 30% | 20% | 44% |
| 40% | 10% | 46% |
| 50% | 20% | 60% |
| 50% | 50% | 75% |
Even 50% off and then another 50% off is 75% off, not free.
Sales tax and coupons
In the US, sales tax is added at the register, so the price on the tag usually doesn't include it. When a store lowers its own price, tax is normally charged on the lower price. Manufacturer coupons can work differently: several state revenue departments, including Florida's and Colorado's, tax the price before a manufacturer coupon because the store is paid back for it, while Massachusetts treats both kinds of coupon as a discount. Rules vary by state (checked October 2026), so treat the tax line here as an estimate. In the UK and Europe, shelf prices already include VAT; to see how much VAT is in a sale price, use the VAT calculator.
Running a sale? Check your margin first
A discount comes straight out of profit. Take 20% off an item that cost you $60 and normally sells for $100, and the margin falls from 40% to 25%, while every unit still costs the same. Before setting a sale price, check what's left with the margin calculator, see how many extra sales you'd need in the break-even calculator, or rebuild the price from cost with the markup calculator.
Frequently asked questions
How do I calculate a discount?
Multiply the original price by the percentage off and divide by 100 to get the savings, then subtract that from the price. For $80 at 25% off: $80 × 25 ÷ 100 = $20 saved, so you pay $60. A shortcut is to multiply by what you keep: $80 × 0.75 = $60.
How do I take 20% off a price?
Multiply the price by 0.8, because you pay 80% of it. A $45 item at 20% off costs $36. For 30% off multiply by 0.7, for 15% off by 0.85, and for 40% off by 0.6.
Is 20% off and then 10% off the same as 30% off?
No, it's 28% off. The second discount is taken from the reduced price, not the original: $100 becomes $80, then 10% off that is $72. To combine two discounts, multiply what you keep (0.8 × 0.9 = 0.72) and take it from 1.
How do I find the percentage off between two prices?
Subtract the sale price from the original, divide by the original and multiply by 100. A coat that was $250 and is now $175 is $75 cheaper: $75 ÷ $250 = 0.3, so 30% off.
Is sales tax charged before or after a discount?
A store's own discount or sale price usually lowers the price that sales tax is charged on. Manufacturer coupons are treated differently from state to state: in many states tax is charged on the price before the coupon, because the manufacturer pays the store back. Check with your state's department of revenue if it matters.
Does the order of two discounts matter?
Not when both are percentages: 20% then 10% gives the same price as 10% then 20%. It does matter when one is a dollar amount. On $100, $10 off then 20% off leaves $72, while 20% off then $10 off leaves $70.
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