EStore Tools

Discount Calculator

Get the sale price and how much you save from a percentage or amount off, or find the percent off between two prices.

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Your numbers

$
%
items

Leave at 0 if the price already includes tax.

%

Your result · updates as you type

Sale price

$59.99

You save $20.00 (25%) on each item.

You save
$20.00
You pay
$59.99
Percent off
25%

Tax is worked out on the discounted price. For two discounts in a row (a sale plus a code), use the stacked discount calculator: they don't simply add up.

Price of $79.99 at each discount
10% off
$71.99
15% off
$67.99
20% off
$63.99
25% off
$59.99
30% off
$55.99
40% off
$47.99
50% off
$40.00

Breakdown

Original price
$79.99
Discount
−$20.00
Sale price
$59.99

How to calculate a discount

Sale price = original price × (1 − discount %)
Percent off = (original price − sale price) ÷ original price

Example: the default numbers

Original price
$79.99
Discount
25%

79.99 × 0.75 = $59.9925, so the sale price is $59.99 and you save $20.00.

Add a tax rate if tax goes on top at checkout. Tax is worked out on the discounted price.

For store owners: showing a discount

  • Shopify: set the Compare-at price higher than the Price on the product to show it as on sale.
  • WooCommerce: enter a Sale price on the product's General tab.
  • Codes and automatic discounts are set up in Shopify under Discounts, and in WooCommerce under Marketing → Coupons.
  • Before you run it, check how much extra you need to sell with the discount break-even calculator.

Two discounts aren't added together

A 30% sale plus an extra 20% off usually means 20% off the sale price, which is 44% off in total, not 50%. Use the stacked discount calculator for that.

Questions people ask

How do I work out 25% off?

Multiply the price by 0.75. $79.99 × 0.75 = $59.99.

How do I find what percent off a sale is?

Divide the saving by the original price. $80 down to $60 is $20 ÷ $80 = 25% off.

Is tax charged on the original or the discounted price?

Usually on the discounted price when the store gives the discount. Rules for manufacturer coupons can differ by state or country.

What's the difference between 50% off and buy one get one free?

If you buy two, they cost the same. If you only want one, 50% off is better, because BOGO needs you to buy two.

Related tools

Stacked Discount CalculatorFind the real percentage off when two or three discounts stack, applied one after another or all from the original price.Markdown CalculatorFind the deepest clearance markdown that still hits your sell-through target and your margin on the whole buy.Discount Break-Even CalculatorSee how many more units you need to sell before a discount actually makes you money.Markup CalculatorTurn a cost and markup into a selling price, or convert between markup and margin in either direction.

Want this builtinto your store?

I'm Emmanuel, a Shopify and WooCommerce developer. If this tool pointed at something you'd rather have fixed for you (a faster store, cleaner product data, a migration, a custom feature), send me a note.

Emmanuel Asika

Emmanuel Asika

Shopify & WooCommerce developer, Dublin

I build and fix online stores: new builds, migrations, speed, SEO and the custom bits apps can't do.

hello@emmanuelasika.com
See my work

Last reviewed 30 September 2026.

Sources: Shopify Help Center: Setting sale prices (compare-at price) · WooCommerce docs: Coupon management