KitJade
Calculators & ProductivityRuns in your browserNew

Discount Calculator

Sale price, savings and stacked discounts.

Use the Discount Calculator tool

Runs in your browserUpdated Report a problem

What this discount calculator does

Discount Calculator takes an original price and a percentage discount and returns what you pay, what you save and the effective reduction. Add a second discount to model promotions that apply one reduction after another, such as 20% off then an extra 10% at checkout.

The second discount applies to the already reduced price, not the original. That is why two 20% discounts produce a 36% total saving rather than 40%. The tool computes the real figure so a checkout total never comes as a surprise.

Why use it

  • Check a sale price before paying.
  • Compare a single discount with a stacked offer.
  • Confirm the effective percentage a promotion really gives.

How to use it

  1. 1Enter the original price.
  2. 2Enter the first discount percentage.
  3. 3Add a second discount if the offer stacks, then read the final price and saving.

Worked examples

Single discount

Input

Price 2,499 · 20% off

Output

Pay 1,999.20 · save 499.80

Stacked discounts

Input

Price 100 · 20% then 10%

Output

Pay 72.00 · effective discount 28%

Common mistakes

  • Adding stacked percentages together instead of multiplying the remaining price.
  • Applying a discount to the post-tax total when the promotion applies before tax.
  • Rounding each step in a long chain, which shifts the final total.

Frequently asked questions

Why is 20% + 10% not 30%?
The second discount applies to the reduced price. 100 becomes 80, then 10% of 80 is 8, leaving 72 — a 28% total reduction.
Does the calculator handle tax?
No. It works on the price you enter. Apply tax after the discount if that is how the seller calculates it.
Can I calculate the original price from a sale price?
Divide the sale price by (1 − discount/100). This tool goes the other direction; the percentage calculator handles reverse percentage questions.

Related tools

All tools

Percentage Calculator

Percent of a number, percent share and percent change.

Runs locally

Campaign ROI Calculator

Profit, ROI, ROAS and payback from two numbers.

Runs locallyNew

GST Calculator

Add or remove GST with the CGST/SGST breakdown.

Runs locally

Age Calculator

Exact age plus a next-birthday countdown.

Runs locally