Calculate sale price after a percent discount and total savings.
Overview
Retail promotions quote percent off the original price. A 30% off tag means you pay 70% of list price, not that the price drops by 30 currency units unless the item happens to cost 100.
Sale price = original × (1 − discount/100). Savings = original − sale price. Stacked coupons apply sequentially to the current price, which can differ from summing percentages mentally.
Tax is usually computed on the discounted price in many jurisdictions, but policies vary. This calculator focuses on the discount math before tax and shipping, which can dominate online checkout totals.
Compare unit prices after discount when bundle sizes differ. A steeper percent off on a smaller package may still cost more per ounce than a modest discount on bulk.
Steps
List or MSRP before discount.
Promotion percentage.
Multiply by remaining fraction.
Subtract sale from original.
Re-run on new price if sequential coupons apply.
Apply local tax rules after discount if needed.
Math
Sale = Original × (1 − Discount/100); Savings = Original − Sale
Discount removes a fraction of price; remaining fraction is what you pay.
Worked cases
120 × 0.70 = 84
Sale $84, save $36.
49.99 × 0.85
Sale ≈ $42.49.
84 × 0.90
Final ≈ $75.60 (sequential stacking).
Why use this
Questions