Discount Calculator
Five modes for every shopping scenario. Stack coupons, reverse-engineer original prices, and queue multiple items to see your total savings.
Stacked discounts apply one after another. 20% off then 10% off is not 30% off, it is 28% off.
Returns the discount percentage that was applied.
Returns the original price before the discount was applied.
A flat money-off coupon. Use this for fixed-value vouchers.
Saved items
- Items
- 0
- Subtotal (originals)
- 0.00
- Total savings
- 0.00
- You pay
- 0.00
How to use
- Pick a calculation mode at the top.
- Enter the values; the final price and savings appear instantly.
- Click Add to list to queue items and see combined totals.
- Use CSV to export your list, or Copy for a single result.
- Tax, when enabled, is applied to the discounted price like normal retail pricing.
Why stacked discounts are not additive
If a 100 item is 20% off, you pay 80. An extra 10% off the 80 takes off 8, not 10. Final price is 72, an effective 28% discount, not 30%.
Frequently asked questions
How do stacked discounts work?
Each discount applies in turn to the running total. Two consecutive 20% offers do not equal 40% off; together they remove only 36% of the original price, because the second 20% applies to the already-reduced amount.
Does the calculator include tax?
Yes if you enable the tax option. It defaults to a tax-inclusive view for everyday shopping comparisons but can be toggled off.
What is the effective discount percentage?
It is the total savings divided by the original price, expressed as a percent. It is the single most useful number when comparing two deals that combine different stacked offers.
Can I print or share a price comparison?
Yes. Use the copy button to grab a plain-text breakdown, or screenshot the breakdown card to share quickly in chat.
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