Type in any original price and discount percentage to instantly see the exact amount you save and the final price you pay after the markdown.
Common discounts:
You Save
Final Price
You Pay
Use this table to see what you'd save and pay per 100 at each discount level. Scale up or down for your actual price.
| Discount | You Save (per 100) | You Pay (per 100) |
|---|
The math behind a percentage discount is two steps:
Step 1: Discount Amount = Original Price × (Percentage Off ÷ 100)
Step 2: Final Price = Original Price − Discount Amount
For the core query example — what is 30% off $85? — it works out as: $85 × 0.30 = $25.50 savings, leaving a final price of $59.50.
A shortcut: multiply the original price by (1 − discount rate). So 30% off means you multiply by 0.70. On $85, that's $85 × 0.70 = $59.50 — same result, one step.
When a store runs "20% off, plus an extra 15% at checkout," most people expect 35% off. The actual discount is smaller. The second percentage applies to the already-reduced price, not the original.
Example on a $200 item: 20% off brings it to $160. Then 15% off $160 takes off $24, giving you $136. That's a total saving of $64, or 32% — not 35%.
The general formula for stacked discounts: multiply the "pay" rates together. Here, 0.80 × 0.85 = 0.68, so you pay 68% of the original price (a 32% effective discount).
A fixed "$20 off" coupon and a "25% off" deal are only equal at one price point — in this case, $80. Below $80, the flat $20 off saves more. Above $80, the 25% discount wins.
Quick check: divide the fixed dollar amount by the percentage (as a decimal). $20 ÷ 0.25 = $80. That's your breakeven price. If the item costs more, go with the percentage deal.
This calculator provides estimates for informational purposes only. Actual checkout prices may differ due to sales tax, rounding, additional fees, or store-specific coupon policies. Always confirm the final price at the point of sale.