A free discount calculator that stacks discounts the way shops do, adds tax, and finds the price before a sale.
See what you pay after a discount, an extra % off, a coupon and tax, or find the price before a sale.
Your numbers
An extra % off comes off the already reduced price, the way shops apply it. The coupon comes off after both, then tax goes on top.
Your result
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This free discount calculator shows what you pay after a percent off, an extra percent off, a coupon and sales tax, and what you save. It can also work backward from a sale price to the price before the sale.
It shows the price at each step, so you can see where your money goes.
I built it because "25% off, then an extra 10% off" sounds like 35% off, and it isn't. Shops know that, and this calculator shows the real number.
Here's how discounts stack, a worked example, and how to tell a real deal from a dressed-up one.
TL;DRKey takeaways
What is a discount calculator?
A discount calculator takes a price and the discounts on it, and gives you the price you pay.
This one also handles the extra percent off many sales add at the till, a fixed coupon amount, and sales tax on top.
How to use the discount calculator
You need the price and the percent off.
Your numbers stay in this browser, and the link button shares the same sum with someone else.
A worked example
Here's the example the calculator loads when you press Try an example.
A jacket costs $80, with 25% off and an extra 10% off at the till, and 8.25% sales tax.
| Step | Price |
|---|---|
| Original price | $80.00 |
| After 25% off | $60.00 |
| After an extra 10% off | $54.00 |
| Sales tax of 8.25% | + $4.46 |
| You pay | $58.46 |
You save $26 on the price before tax. That's 32.5% off in all, because the extra 10% comes off $60, not $80.
How discounts stack
Each discount comes off the price the one before it left.
Percents multiply
25% off leaves 0.75 of the price, and 10% off leaves 0.9 of that. Together that's 0.75 × 0.9 = 0.675, so you pay 67.5% and save 32.5%.
The order of percents doesn't matter
10% then 25% gives the same $54. The order matters only for a fixed coupon amount, which saves more percent when it comes off a smaller price.
Tax comes last
In the US, sales tax goes on the price after discounts. Shopping abroad, the currency converter and the card fees abroad calculator show what the price costs you at home.
Mistakes to avoid
These are the ways a discount looks bigger than it is.
- Adding stacked discounts together instead of multiplying them
- Trusting a "was" price nobody ever paid
- Forgetting sales tax, shipping or a restocking fee
- Buying more than you need because the percent looked big
The unit price calculator shows whether the bigger pack on offer is cheaper for the same amount.
Who is the discount calculator for?
It's for shoppers, and for sellers who set prices, and these tools help around it.
- Percentage calculator – for every other percent question
- Unit price calculator – for comparing sizes and packs
- Currency converter – for prices in another currency
- Card fees abroad calculator – for what your card adds overseas
- Debt payoff calculator – for the cards a shopping spree lands on
Check the real percent before you buy, not after.
Plan your money with your AI
Take your numbers further in
Discount Calculator FAQs
Questions about the discount calculator? Here's what to know.
A discount calculator works out the price after a discount and what you save.
This free one adds an extra percent off, a coupon amount and sales tax, and works backward from a sale price.
Multiply the price by 1 minus the discount as a decimal.
25% off $80 is $80 × 0.75, which is $60.
Multiply both: price × (1 − first) × (1 − second).
25% and then 10% off $80 is $80 × 0.75 × 0.9, which is $54.
No, it's 32.5% off.
The extra 10% comes off the already reduced price.
Divide the sale price by 1 minus the discount.
For example, $54 after 32.5% off is $54 ÷ 0.675, which is $80.
In the US, sales tax goes on the price after discounts.
The calculator adds it last.
The calculator takes a coupon amount off after the percents, the way most shops ring it up.
Check the shop's own terms, because some apply it first.
One on a price people actually paid before the sale.
Check the item's price history, because some "was" prices are set only to be marked down.
Yes, pick any of 158 currencies.
The numbers format the way your country writes them.
Yes, it's free with no sign-up.
It runs in your browser.
I did.
I'm Navid Moazzez, and I made the discount calculator as one of my free tools on navid.me.
More about me.
Navid Moazzez
AI business strategist & AI OS builder
Navid Moazzez helps creators and founders master AI and build their own AI Operating System (AI OS) to automate their business and life.
Navid.me is reader-supported. When you buy through links on this site, I may earn an affiliate commission. Learn more.
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