How the discount is calculated
The sale price is the original price multiplied by (1 − discount ÷ 100). A 25% discount on 200 gives 200 × 0.75 = 150, so you save 50.
Why two discounts are not added together
When a shop offers "25% off, plus an extra 10% off", the second discount applies to the already reduced price. On 200 that means 200 × 0.75 × 0.90 = 135. Your total saving is 65, which is 32.5% and not 35%. The tool does this for you.
Adding tax or VAT
In many countries tax is added after the discount. Enter the tax rate and the calculator adds it to the discounted price, so the figure labelled "You pay" is what the till should show. Prices that already include tax should be left with the tax field empty.
Is this deal actually good?
- Compare the sale price with the normal price at other shops, not only the "was" price on the label.
- Check whether delivery or other fees cancel out the saving.
- Think about whether you would buy the item at full price. If not, a discount does not make it a saving.
Frequently asked questions
How do I find the original price from the sale price?
Divide the sale price by (1 − discount ÷ 100). A sale price of 150 after 25% off means the original was 150 ÷ 0.75 = 200.
Can I use it for markups?
Not directly. For an increase use the percentage calculator.