How the math works
Percent coupon saves price × rate. Flat coupon saves the face value, but only if you meet the minimum spend.
Example
- Enter your cart total.
- Enter a percent-off coupon and/or a flat amount coupon.
- Add any minimum spend.
- Use the better valid option — or neither, if the minimum forces extra spending.
Catch the catches
- Spending $20 extra to unlock a $5 coupon is not a $5 win.
- Stacking rules vary. Never assume a store coupon plus a cashback portal plus a code all apply together.
Questions
Should I spend extra to hit a coupon minimum?
Only if the extra items were already on your list. Spending $20 to unlock $5 off is a $15 loss if those extras were optional.
Are these calculators free?
Yes. They run in your browser. You do not need an account, and we do not require personal financial data to use them.
Should I treat the result as a bank or store quote?
No. Results are educational math. Merchants, lenders, and tax rules can differ. Verify the live terms before you pay.