Discount Calculator

ABOUT THIS TOOL

This calculator works two ways: enter an original price and a discount percentage to see the amount saved and the final price, or enter the original and sale price to find out what percentage discount was actually applied. It also handles stacked discounts, which isn't as simple as adding percentages together, since a second discount applies to an already-reduced price rather than the original. Shoppers use it to sanity-check '50% off' signage, compare competing sales across stores, catch inflated 'original prices' designed to make a discount look bigger than it is, and work out real per-unit savings on bulk or bundle deals before checking out.

HOW TO USE

1. Enter the original price of the item.
2. Enter either the discount percentage or the sale price you were quoted.
3. Read the savings amount and final price the tool calculates.
4. For a second discount or coupon, apply it to the new subtotal, not the original price.
5. Compare results across stores to see which deal is genuinely better.

COMMON USE CASES

• Comparing two stores both advertising sales to see which actual price is lower.
• Figuring out the true final cost of an item with a store discount plus a coupon code.
• Checking whether a 'was $X now $Y' tag matches the percentage off advertised on the sign.
• Budgeting for a big purchase like furniture or electronics during a seasonal sale.
• Splitting a bulk 'buy more, save more' discount across items to find the real per-unit price.

TIPS & COMMON MISTAKES

• Stacked percentage discounts multiply, not add — 20% off followed by 10% off equals 28% off total, not 30%.
• Watch for inflated 'original' prices that make a discount look larger than the real savings.
• Sales tax is usually calculated on the discounted price, not the original, but rules vary by location.
• For budgeting or returns, treat the discounted price as your actual cost basis, not the sticker price.

MORE QUESTIONS

Why doesn't 20% off plus 10% off equal 30% off?

Because the second discount is applied to the already-reduced price, not the original. Mathematically it's 0.80 × 0.90 = 0.72, meaning you pay 72% of the original price, an effective 28% discount rather than 30%.

Does this calculator include sales tax?

No. It calculates price adjustments only. Tax rates and whether tax is applied before or after a discount vary by jurisdiction and item category, so apply tax separately based on local rules.

How do I find the discount percentage if I already know both prices?

Divide the amount saved (original minus sale price) by the original price, then multiply by 100. The calculator does this automatically when you enter both prices instead of a percentage.

Can this help spot a fake discount?

It can confirm the math is consistent with the advertised percentage, but it can't verify the retailer's true prior price. If you suspect the 'original price' was raised right before the sale, compare against a price-history source if one is available.

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