“25% off, plus an extra 10% off” sounds like a 35% discount at first glance — but it isn’t, because the second discount is calculated on the already-reduced price, not the original. This calculator makes the real, smaller effective discount visible.
What Is the Discount Calculator?
A tool that computes the final price, amount saved, and effective discount rate for an original price with up to two sequential (“stacked”) percentage discounts applied in order.
How to Use It
- Open the tool at /tools/discount-calculator.
- Enter the original price and the first discount percentage.
- Optionally, add a second stacked discount percentage.
- Read the amount saved, final price, and effective combined discount rate.
Key Features
- Sequential stacking logic, applying the second discount to the already-discounted price, matching real-world “extra X% off” promotions.
- Effective discount rate, showing the true combined percentage saved — always less than simply adding the two percentages.
- Single-discount support, just leave the second field at 0% for a standard one-discount calculation.
- Instant, live recalculation as you adjust any value.
When to Use This Tool
- Shopping during sales, quickly checking the real final price of a stacked-discount deal.
- Retail and e-commerce work, verifying discount math before publishing a promotion.
- Comparing deals, seeing which of two different stacked-discount offers actually saves more.
Try It Now
Open Discount Calculator directly, or press ⌘K and type the tool name from anywhere on the site.
Part of the Math & Numbers collection on WebdevToolbox — free, browser-based developer tools with no login required.