🏷️ Math 3 modes Last tested2026-05-25
Discount Calculator 3 ways to solve it.
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Quick answer
A $120 item at 35% off costs $78 — you save $42. Switch modes to find the discount %, original price, or how much you'd save buying 2–3 units.
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Discount Calculator
$
%
Sale Price
$78.00
You Save
$42.00
Discount %
35.0%
Bulk Savings
×1 unit
$78.00
×2 units
$156.00
save $84.00
×3 units
$234.00
save $126.00
✨ Live · Switch modes to solve for any unknown
CE
🧮 Three formulas
One unknown, three ways.
Mode 1: % Off
Sale = Original × (1 − %/100)
$120 at 35% off → $120 × 0.65 = $78
Mode 2: Sale Price → %
% = ((Orig − Sale) / Orig) × 100
$120 → $78 → ((120−78)/120) × 100 = 35%
Mode 3: Find Original
Orig = Sale / (1 − %/100)
Paid $78 at 35% off → $78 / 0.65 = $120
❓ FAQ
Common questions.
How do I calculate a percentage discount?
Sale price = Original price × (1 − discount% / 100). For example, $120 at 35% off: 120 × (1 − 0.35) = 120 × 0.65 = $78. You save $42.
How do I find the discount percentage from two prices?
Discount % = ((Original − Sale) / Original) × 100. For example, $120 original, $78 sale: ((120 − 78) / 120) × 100 = 35%. Use "Sale Price" mode in the calculator.
How do I find the original price from a discounted price?
Original price = Sale price / (1 − discount% / 100). If you paid $78 and there was a 35% discount: 78 / 0.65 = $120. Use "Original" mode in the calculator.
What is the bulk savings feature?
The bulk savings row shows the total cost and total savings if you buy 1, 2, or 3 units at the same discounted price. Useful for comparing multi-unit purchases.
Does this calculator handle tiered or stacked discounts?
This calculator handles a single discount. For stacked discounts (e.g., 20% off then an extra 10% off), apply the first discount to get a new price, then apply the second discount to that result.