Sales & Promo Discount Calculator

How to use

1. Select the promo type: percentage discount, Buy 2 Get 1 Free, 2nd item discount, or Buy 3 Get 1.
2. Enter the regular item price.
3. Specify the discount percentage or promotional parameters.
4. View the final discounted unit price, total price, and real savings.

What does the discount calculator compute?

• Discounted price — final price after applying the promotional markdown.
• Cash savings — the exact amount of money saved on the purchase.
• True discount percentage — the effective percentage saved compared to retail price.
• Stacked discounts — final price when multiple discounts apply sequentially.
• Promo comparison — evaluate which promotional structure yields maximum savings.

How do consecutive (stacked) discounts work?

When a store offers 20% off plus an extra 10% coupon, the percentages do not simply add up (20% + 10% ≠ 30%).

The second discount applies to the already discounted price: on a $100 item, 20% off lowers it to $80, and the extra 10% reduces it to $72. Total savings is $28 (28%), not $30.

Comparing common retail promotional formats

• Buy 2 Get 1 Free (1+1=3): provides an effective 33.3% discount on all three items.
• Buy 1 Get 1 at 50% off: provides an effective 25% discount across both items.
• Buy 3 Get 1 Free (3+1): provides an effective 25% discount on each item.
• Flat 30% off: saves more than buy 1 get 1 at 50% off (30% vs 25%) and does not force you to buy extra units.

How to verify whether a promotion is genuine

• Check historical price tags to ensure base prices were not inflated right before the sale.
• Calculate the cost per unit, liter, or kilogram rather than looking only at total bundle pricing.
• Factor in shipping fees and minimum order requirements that could offset promo gains.