Everyday money

Discount Calculator

Calculate savings, discounted price, an optional second discount and the final price after sales tax.

Successive discounts are applied one after another; they are not simply added together.

How multiple discounts work

A second discount applies to the already-discounted price. For example, 20% off followed by 10% off produces a 28% combined reduction—not 30%.

Sales Tax CalculatorPercentage Calculator

Educational calculation only. Taxability and displayed prices vary by jurisdiction and seller.

Published by RVR — Founder & Editor, IQlatorMethodology reviewed September 24, 2026Educational information

Check the final price instead of relying on the discount label

A discount percentage describes the reduction from the original price. The amount saved equals original price multiplied by the discount rate, and the sale price equals original price minus that savings. Taxes, shipping and fees may still change the checkout total.

How to use this page

Convert the percentage to a decimal, multiply it by the original price, and subtract the result. For successive discounts, apply each discount to the new price; adding the percentages together usually overstates the savings.

Practical exampleA 20% discount on $100 saves $20 and produces an $80 sale price before tax. A second 10% discount applies to $80, producing $72—not $70.

Inputs to verify

  • Confirm the original price is the actual comparison price.
  • Apply coupons in the order required by the retailer.
  • Add sales tax and non-discounted fees when comparing final totals.

Common questions

Is 20% off plus 10% off equal to 30%?

Normally no. Successive discounts multiply, so the combined reduction in this example is 28%.

How do I find the discount from two prices?

Subtract the sale price from the original, divide by the original, and multiply by 100.

Methodology and sources: Uses standard percentage arithmetic; retailer exclusions and checkout rules may differ.