CouponCodes
Stop guessing. Use our calculators to find the best coupon order and know when free shipping actually saves you money. Plus practical guides that answer real coupon questions.
Coupon Stacking Optimizer
Enter your coupons and cart total. We calculate every possible order and show you the cheapest combination.
Free Shipping Calculator
Find out if adding items to hit free shipping actually saves money — or costs you more than just paying for shipping.
Can You Stack Coupons?
When you can use multiple coupon codes on one order — and when you can't.
The Free Shipping Trap
When "free" shipping costs you more than paying for delivery.
Why Your Coupon Code Isn't Working
8 common reasons promo codes fail at checkout — and what to do about each one.
Percentage Off vs. Dollar Off
The math behind when 20% off beats $10 off — and when it doesn't.
About CouponCodes
CouponCodes helps online shoppers make smarter decisions about coupons, promo codes, and shipping thresholds. Instead of just listing coupon codes (there are plenty of sites for that), we focus on the math and strategy behind using them well.
Why coupon order matters
When you have multiple coupons — say 20% off and $10 off — the order you apply them changes your total. On a $100 cart, applying 20% first gives you $70. Applying $10 first gives you $72. That $2 difference adds up. Our Coupon Stacking Optimizer calculates every possible order so you always get the lowest price.
The free shipping math most people skip
Your cart is $42 and free shipping starts at $50. Shipping costs $6.99. You could add an $8 item to qualify — but you just spent $8 to save $6.99. You lost $1.01. Our Free Shipping Calculator does this math instantly so you never overspend to "save."
Guides that answer real questions
We write guides based on questions real shoppers actually ask. Can you use two coupons at once? Why isn't your promo code working? Is 20% off or $10 off the better deal? Each guide gives you a straight answer with the math to back it up. Browse our growing library above.
All tools run in your browser. No accounts, no data collection, no tracking. Your shopping stays your business.