Add the numbers for your scenario.
01Everyday toolCalculated result
Discount Calculator
Final sale price and total savings, with stacked coupons and tax.
100% FreeRuns instantlyNo watermark
- 1Enter detailsAdd the numbers for your scenario.
- 2CalculateVootkit updates the result instantly.
- 3ReviewCheck totals, notes and breakdowns.
Private by designProcessed on your device where possible.
Works on any deviceDesktop, tablet and mobile browsers.
No installationOpen the page and start working.
Always free coreUse the free plan for everyday tasks.
How to use Discount Calculator
Vootkit updates the result instantly.
02Check totals, notes and breakdowns.
03Copy the answer into your workflow.
04Your files stay private
Your work is processed locally in your browser where possible and is never added to a Vootkit upload library.
Learn more about privacyA stacked discount is rarely the sum of its parts. "30% off plus an extra 20% with this code" is not 50% off, and the gap is usually where the offer earns its margin.
What Discount Calculator does
Works out what you actually pay after a discount, an optional stacked coupon and sales tax.
The order matters and is fixed for a reason: the coupon applies to the already-reduced price, and tax applies last, to what you actually pay. That is how nearly every till in the world does it.
How stacking really works
| Order applied | Discount → coupon on the reduced price → tax on the total |
|---|---|
| 30% then 20% | 44% off, not 50% |
| 50% then 50% | 75% off, not free |
| Discount range | 0–100% |
| Coupon range | 0–100%, optional |
| Sales tax | Optional, applied at the end |
| Currencies | USD, EUR, GBP, CAD, AUD, INR |
Detailed steps
- Enter the original price and the main discount.
- Add a coupon percentage if one stacks on top.
- Add sales tax if your region adds it at the till.
- Compare the final figure against the headline claim.
Worth knowing
Two stacked percentages multiply rather than add. Thirty percent then twenty percent leaves you paying 0.7 × 0.8 = 56% of the original, so 44% off rather than the 50% it sounds like. The difference is small on a jumper and substantial on a sofa.
Frequently Asked Questions
Why is 30% plus 20% not 50%?
Because the second discount applies to the already-reduced price, not the original. You pay 70% of the price, then 80% of that — 56% overall, so 44% off. Stacked percentages multiply; they never add.
Should tax go before or after the discount?
After, in almost every system. You are taxed on what you actually pay, so the discount comes off first. This tool follows that order.
Does the order of two discounts matter?
Not to the final price — multiplication is commutative, so 30% then 20% costs the same as 20% then 30%. It can matter to whether a retailer allows the combination at all.
How do I work out the original price from a sale price?
Divide rather than adding the percentage back. Something 25% off at 60 was 60 ÷ 0.75 = 80. Adding 25% to 60 gives 75, which is the classic error.
Is Discount Calculator free?
Yes. The Vootkit free plan includes 5 tool runs a day. Upgrade to Vootkit Pro for unlimited daily use, an ad-free workspace and saved workflows.
Are my files uploaded?
No. Discount Calculator runs entirely in your browser — your file is processed on your own device and never sent to a server. There is nothing for us to store or delete.
Do I need to install anything?
No. Discount Calculator works in any modern browser on desktop, tablet or phone. Open the page and start.
How often can I use it? Is there a daily limit?
On the free plan you get 5 tool runs a day. When you reach the limit you'll see a prompt to upgrade, and it resets the next day. Vootkit Pro removes the cap entirely for unlimited daily use.
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This tool processes everything locally in your browser. You can disconnect from the internet after the page loads and it will still work.