🏷️ Discount / Sale Price Calculator

The Discount Calculator is a sale price calculator, percent off calculator, and original price calculator in one — it helps shoppers and retailers work out exactly what a sale price will be, how much will I save on a purchase, what discount percentage or discount rate was actually applied, or how much a series of stacked discounts really adds up to. It's built for everyday use as a markdown calculator and coupon calculator — figuring out a checkout total before you buy, verifying a store's advertised savings, or comparing coupon codes that combine with an existing price drop.

How It Works

The Price After Discount tool acts as a discount amount calculator: it takes an original price plus either a percentage or a flat dollar discount — anything from a 20 percent off calculator to a 30 percent off calculator scenario — subtracts the savings, and optionally applies sales tax to the reduced price to show the final price after discount, matching how most retailers calculate tax after discount, not before. Find Discount % works as a discount percentage calculator and lets you find discount rate in reverse: given an original and a sale price, it calculates the percentage discount that was applied. Stacked Discounts is a dedicated stacked discount calculator and successive discount calculator — sometimes called a double discount calculator — that chains multiple discounts together in sequence, applying each one to the already-reduced price rather than adding the percentages, which is how successive discounts and coupon stacking actually work at checkout.

Formula & Worked Examples

Every tab uses a specific formula, and each one matches this calculator's own default numbers so you can check the math yourself. Price After Discount: Savings = Original Price × (Discount % ÷ 100); Final Price = (Original Price − Savings) × (1 + Tax % ÷ 100). With the default $80 original price at 25% off, Savings = $80 × (25 ÷ 100) = $20, so the price before tax is $80 − $20 = $60. Add an 8% sales tax on top and this discount calculator shows a final price after discount of $60 × (1 + 8 ÷ 100) = $64.80, since tax is applied to the discounted price, not the original one. Find Discount %: Discount % = ((Original Price − Sale Price) ÷ Original Price) × 100. With the default $50 original price and $35 sale price, that's (($50 − $35) ÷ $50) × 100 = (15 ÷ 50) × 100 = 30% — a fast way to find discount rate on any advertised sale price calculator claim. Stacked Discounts: Final Price = Original Price × (1 − d1) × (1 − d2) × …, multiplying the remaining fractions rather than adding percentages. With the default $200 item and two successive discounts of 20% then 10%: Step 1 applies 20% to $200 → $200 × (1 − 0.20) = $160; Step 2 applies 10% to the already-reduced $160 → $160 × (1 − 0.10) = $144. Total Saved = $200 − $144 = $56, and the Effective Discount = ($56 ÷ $200) × 100 = 28% — noticeably less than the 30% Simple Sum of the two percentages, which is exactly why a stacked discount calculator or successive discount calculator gives a different answer than simple addition.

Why It Matters

A common shopping mistake is assuming two discounts add together — "20% off, then an extra 10% off" feels like 30% off, but it's actually only 28% off, because the second discount applies to the already-discounted price. Knowing the real effective discount, and whether tax is calculated before or after the markdown, prevents surprises at checkout and helps this sale savings calculator show which of several promotions actually saves the most money.

Tips for Accurate Results

• Check whether a store applies tax before or after the discount — this calculator assumes the standard "tax after discount" order, which is how most retailers operate.
• When stacking discounts, enter them in the order they're actually applied at checkout, since the sequence can slightly change the final price if any discount is a flat amount rather than a percentage.
• Use Find Discount % to sanity-check advertised sale claims — a "50% off" sticker next to a barely-reduced price is a common retail trick this tool exposes instantly.
• Use it as a quick original price calculator too — if you only know the sale price and the discount percentage, work backward to confirm the original price matches what the store lists.