Shopping Discount Calculator
Sale banners stack offers to look bigger. Enter them all and see what you actually pay and the real discount.
QUICK ANSWERStacked discounts multiply, they do not add. 40% off then an extra 10% off is 1 − 0.6 × 0.9 = 46% off, not 50%. Buy 2 Get 1 is 33% off only if you need three. Cashback comes later and is usually capped, so compare checkout prices too.
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Want this synced, automatic and collecting payments?
- Same workflow in a free FastFee account, on every device and for your whole team
- Automatic WhatsApp reminders before and after due dates
- Payment links, UPI and AutoPay with auto receipts and live “paid” status
What you get free in the Shopping Discount Calculator (Stacked Offers)
- ✅ Discount + extra discount
- ✅ BOGO offers
- ✅ Coupon / flat off
- ✅ Card cashback with cap
- ✅ Real discount %
How to use the Shopping Discount Calculator (Stacked Offers)
- STEP 1Enter your numbersMRP, quantity and every offer on the page.
- STEP 2Read the resultCheckout price, final cost after cashback and real discount.
- STEP 3Share or saveShare the result on WhatsApp or save it as PDF.
Frequently asked questions
Is 50% + 20% off the same as 70% off?
No. The 20% applies on the already-halved price, so the total is 60% off.
Is this tool free? Do I need to sign up?
Yes, it is completely free with no login and no limit on entries. Signing up for FastFee is optional. The free plan keeps your records synced across devices; automatic WhatsApp reminders, UPI AutoPay and team logins are on FastFee Premium.
Where is my data stored?
Only in your browser on this device (local storage). Nothing is uploaded to FastFee. Clearing browser data deletes it, so export a CSV or PDF backup regularly.
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