BrowserTools

Discount Calculator

Sale prices and money saved instantly

By Guga — BrowserTools maintainer, Tbilisi, Georgia Updated 2026-09-12
Free Private No uploads
What is Discount Calculator?

Sales advertise percentages, and percentages applied to an already-reduced price do not add up. This tool makes that visible. Set the original price and a first discount, optionally add a second, and it shows the price after each step, the final figure, and — the number that actually tells you whether the offer is good — the effective discount across both. Thirty percent followed by twenty percent comes out at forty-four percent off, not fifty, because the second cut applies to the smaller number. That intermediate row is deliberate: it is where most people mis-estimate a stacked promotion. There is no coupon code field and no automatic lookup of live offers; it is arithmetic on the numbers you have in front of you at the checkout screen.

Find the final price after one or two stacked discounts, plus exactly how much you save. The quick sanity check for every sale, coupon and checkout screen.

Private Discount Calculator In Your Browser

Discount Calculator is processed locally with client-side JavaScript. Your files never touch a server, and there is no queue to wait in.

Step-by-Step

How to use Discount Calculator

1

Enter the shelf or list price in the Original price field.

2

Type the first percentage into the Discount field.

3

Add a second percentage in the Extra discount field if the promotion stacks; leave it at zero otherwise.

4

Compare the Final price with the After first discount row, and check the Effective discount for the true combined saving.

Key Capabilities
  • A second discount stage is applied to the already-reduced price, which is how promotions actually work and where most mental arithmetic goes wrong.
  • The effective discount is computed from the original and final prices rather than by adding the two percentages, so it stays correct at any combination.
  • The intermediate post-first-discount price is shown, making the compounding effect of stacking visible instead of implicit.
  • Savings are reported as a currency amount as well as a percentage, which is what matters for comparing two offers of different sizes.
Common Use Cases
  • A shopper checks a checkout screen advertising a stacked promotion before tapping pay.
  • A retail buyer compares a supplier's list price with two successive negotiated reductions.
  • A pricing analyst confirms what a two-stage markdown does to a margin.
Clear Answers

Frequently Asked Questions

Does 30 percent off plus 20 percent off equal 50 percent off?
No. The second 20 percent applies to 70 percent of the original price, giving 0.7 × 0.8 = 0.56, so 44 percent off. The effective discount row shows exactly that figure.
In what order are stacked discounts applied?
First discount, then the extra discount on the result. Some retailers reverse the order; the difference shows up in the final price and this tool does not model both orders.
What happens if I put zero in the extra discount field?
The second stage is skipped and the effective discount equals the first discount, which is the normal single-cut case.
Can I work out the original price from the discounted one?
Not directly here — this tool runs forwards from the list price. You would need to divide the sale price by the remaining fraction, which is 0.7 × 0.8 = 0.56 for the example above.