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Discount Calculator — Free Online Tool
Discount Calculator finds the sale price and how much you save, including stacked offers where a second discount applies on top of the first. It can also add sales tax or GST after the discount, which is how most shops actually calculate it.
🚀 Try Discount Calculator now
Free · No signup · Runs in your browser · Instant results
Open Discount Calculator →📌 What is Discount Calculator?
The trap with sale pricing is stacked discounts. An offer of 20% off plus an extra 10% off is not 30% off — the second discount applies to the already-reduced price, so the real saving is 28%. This calculator shows the effective discount so you can see what an offer is genuinely worth.
🚀 How to use Discount Calculator
- Open the Discount Calculator using the button below
- Enter the original price and your currency
- Enter the discount percentage, and a second one if the offer stacks
- Optionally add a tax rate to apply after the discount
👉 Ready? Discount Calculator tool and get started now!
✨ Features and benefits
- 100% free — no registration or signup required
- Calculated in your browser — the numbers you enter are never uploaded
- Instant results — figures update as you type, with no button to press
- Works on all devices — mobile, tablet and desktop
- Nothing to install — runs directly in your browser
❓ Frequently asked questions
Is 20% off plus 10% off the same as 30% off?
No. The second discount applies to the reduced price, so the combined effect is 28% off, not 30%. The calculator shows the true effective discount.
How do I find the discount percentage from two prices?
Subtract the sale price from the original, divide by the original, then multiply by 100.
When is tax applied?
After the discount, which matches how most retailers calculate it. Leave the tax field at zero if your price already includes tax.
Does it store my figures?
No. Everything is worked out in your browser and nothing is uploaded.
✅ That's all there is to it
Discount Calculator is free to try — no registration required.
Open Tool →