How do you use this tool?
- Enter the original (full) price in the first field.
- Enter the discount percentage (e.g., 20 for 20% off).
- Read off the discounted price and your dollar savings instantly.
- To reverse-calculate: enter the original price and the sale price — the tool returns the discount percentage.
What This Tool Does
The Discount Calculator takes two numbers — a price and a percentage — and instantly returns the discounted price and the dollar amount you save. It also runs in reverse: give it an original price and a sale price, and it computes the percentage off. No calculator app, no mental math, no rounding guesses.
How It Works
The forward calculation uses the standard retail discount formula:
| Input | Formula | Result |
|---|---|---|
| Original price $P$, Discount % $D$ | Sale price = P × (1 − D/100) | Discounted price |
| Original price $P$, Discount % $D$ | Savings = P × (D/100) | Dollar savings |
The reverse calculation:
| Input | Formula | Result |
|---|---|---|
| Original $P$, Sale price $S$ | Discount % = (P − S) ÷ P × 100 | Percentage off |
All calculations happen in your browser. Nothing is sent to a server.
What Are Common Use Cases?
Black Friday & Cyber Monday shopping — Retailers advertise “up to 70% off,” but the actual savings vary by item. Paste in the price tag and the advertised sale price to verify you’re actually getting the deal claimed.
Coupon stacking at checkout — Many US stores (Target, Kohls, Amazon) allow stacking a store coupon with a manufacturer coupon. Calculate each discount step in sequence to find your final out-of-pocket cost.
Wholesale and B2B purchasing — Distributors frequently quote net prices as “list minus 30%.” Enter the list price and 30% to confirm the number before signing a purchase order.
Student and military discounts — Programs like UNiDAYS and GovX offer 10–15% off. Quickly verify whether a brand’s discount is competitive before committing to a subscription.
Price-matching requests — US big-box stores (Best Buy, Walmart, Target) price-match competitors. Calculate what a competitor’s discount works out to in dollars, then present the exact amount to customer service.
Restaurant and app promo codes — Food delivery apps (DoorDash, Uber Eats) frequently offer 20–30% off your first order or $15 off orders over $30. Check which deal type saves you more for your order size.
Frequently Asked Questions
Why does stacking two 10% discounts not equal 20% off? Because each discount applies to the already-reduced price. First 10% off $100 = $90. Second 10% off $90 = $81. Total savings: $19, which is 19% — not 20%.
What is a “markdown” vs. a “discount”? In US retail terminology, a markdown is a permanent price reduction (the item’s new regular price is lower). A discount is a temporary reduction from the original price, often requiring a coupon or promotion code. Mathematically, the calculation is identical.
How do I find the original price if I only know the sale price and the discount? Original price = Sale price ÷ (1 − Discount%/100). Example: A $75 item is “25% off.” Original price = $75 ÷ 0.75 = $100. This tool handles that calculation automatically in reverse mode.
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