A walkthrough, end to end.
- 1
Pick a mode: compute sale price from list price + percent off, or compute percent off from list and sale prices.
- 2
Enter the values; the calculator returns the result and the amount saved.
- 3
Stack multiple discounts using sequential applications.
Discount math
A percent-off discount multiplies the original price by (1 − pct/100). Stacked discounts are applied sequentially, NOT additively — 20% off then 10% off is 28% total off, not 30%.
What you can do with this.
Black Friday sale price
List price $1,200 with 35% off → sale price $780. Use the calculator to spot-check that the displayed sale price matches the advertised percent off — sometimes they don't quite line up.
Stacked coupon discounts
20% off coupon + extra 10% off store-wide. Final = $100 × 0.80 × 0.90 = $72 (28% off, not 30%). Multiplicative, not additive — important for negotiation.
Reverse: what's the discount %?
Original $89, sale $59.99 → 32.6% off. Useful when the store doesn't display the percent — back-calculate to compare against advertised promotions.
Bulk volume discount
Suppliers often quote tiered discounts. Use the calculator to find your effective rate per tier and choose the right purchase quantity.
Member / loyalty pricing
Confirm a 'member 15% off' actually applies on top of clearance, not just full price. Sometimes loyalty discounts exclude already-discounted items.
Coupon stacking strategy
Apply percent-off coupons FIRST, then dollar-off coupons (when allowed). $100 item, 25% off, then $20 off = $55 final. Reverse order = $60 final. Order matters.
Discount calculator 2026 — what's current
Browser extensions (Honey, Capital One Shopping) auto-find and apply coupons at checkout. Even with these, the calculator helps verify the savings actually match the claimed percent.
Frequently asked.
No — they multiply. 20% + 10% off = 28% total, not 30%. Each subsequent percent applies to the already-discounted price.
After. Tax applies to the price actually paid (after discount). Some receipts show tax on full price then a 'discount applied' line — the math should still work out the same total.
Apply percent off first, then dollar off — almost always the better deal for the buyer. Verify your store/site doesn't override the order.
No. Calculations run entirely in your browser.