orbitHow to calculate a discount
Enter the original price and the discount in percent. The calculator shows the final price and the amount you save, rounded to two decimal places, and updates as you type. It works with any currency.
The formula
Final price = original price × (1 − discount ÷ 100). Savings = original price × discount ÷ 100.
Example: a pair of shoes costs 120 and is reduced by 35%. The savings are 120 × 0.35 = 42, so the final price is 120 − 42 = 78.
Stacked discounts are not added together
Shops sometimes offer “an extra 20% off sale prices”. Two discounts of 30% and 20% do not make 50%. The second discount is applied to the already reduced price: 100 → 70 → 56, which is a total discount of 44%. To calculate it here, run the calculator twice, using the first final price as the second original price.
Smart shopping tips
- Compare the final price, not the percentage. 30% off a higher original price can still be more expensive.
- Check the price per unit (per kilogram, litre or item) when comparing pack sizes.
- Include shipping and fees before deciding whether a deal is worth it.
Frequently asked questions
How do I work out the discount percentage from two prices?
Use the “Percentage change” mode of the Percentage calculator: enter the original price as the old value and the sale price as the new value.
Is sales tax included?
The calculator works with whatever price you enter. If tax is added at checkout, add it to the final price afterwards.