Discount Calculator

Handy for shopping, Black Friday comparisons, margin checks and any moment a shop window says 40% off and you want the real number before you reach the till.

How to use the discount calculator

Enter the original price.

Enter the discount percentage, and tax if it applies.

See the final price and exactly what you save.

Why use the Convert Now discount calculator

Tax support

Add sales tax or VAT on top of the discounted price.

Clear savings figure

See the money saved, not just the new price.

Any currency

Set your own currency symbol.

Instant

Results update as you type.

Stacked discounts do not add up

An extra 20% off an item already reduced by 30% is not 50% off. The second discount applies to the already-reduced price, so you pay 0.7 × 0.8 = 0.56 of the original – a 44% reduction, not 50%. To model this, run the calculator twice, using the first result as the starting price for the second discount.

Working backwards from a sale price

If a tag shows a sale price and an original price and you want the percentage, divide the saving by the original price and multiply by 100 – or use our percentage calculator's increase/decrease mode, which does exactly that. It is a useful check when a shop advertises "up to 70% off" and the item in your hand is closer to 15%.

Tax and the order of operations

Discounts are applied before sales tax almost everywhere, because tax is charged on the amount you actually pay. That is the order used here: the discount comes off first, then the tax percentage is applied to the reduced price. If you enter a VAT-inclusive price, leave the tax field at zero.

Read the guide: How to Calculate Percentage: Formulas & Examples

Frequently asked questions

How do I calculate a discount?

Multiply the price by the discount percentage and divide by 100 to get the saving, then subtract it. Enter both figures and the calculator does it instantly.

How do I work out 20% off?

Multiply the price by 0.8. For example, 20% off 50 is 50 × 0.8 = 40.

How do stacked discounts work?

They multiply rather than add. 30% off then a further 20% off leaves you paying 56% of the original, a 44% total discount.

Is tax applied before or after the discount?

After, in almost all jurisdictions – tax is charged on what you actually pay. The calculator follows that order.

How do I find the original price from a sale price?

Divide the sale price by (1 − discount ÷ 100). A 25%-off item costing 60 was originally 60 ÷ 0.75 = 80.

Is it free?

Yes, completely, with no sign-up.