Discount Calculator
Work out the discount amount and final price from an original price and a discount percentage.
What this calculator does
This tool turns an original price and a discount percentage into the amount reduced and the final price. It is useful for checking a promotion, negotiating a client discount, or reviewing a price before it appears on an invoice.
How to use it
- Enter the price before the discount.
- Enter the discount percentage.
- Use the discount amount and final price shown to check your offer.
Formula
The discount amount is original price × discount rate. The final price is original price − discount amount.
For example, 200 reduced by 15% has a discount of 30 and a final price of 170.
How to interpret the result
The result shows one percentage reduction from the price you entered. It does not decide whether the discount is commercially sensible or whether tax, shipping, or other charges should be added before or after the reduction.
Common mistakes
- Adding percentages when applying consecutive discounts; two discounts are applied one after the other.
- Applying a discount to a VAT-inclusive price when your policy uses a pre-tax price.
- Forgetting to compare the discounted price with your cost.
Limitations
This calculator handles a single percentage discount. It does not model tiered offers, coupons, taxes, or contract-specific pricing rules.
What happens with two discounts?
Apply the first discount to the original price, then apply the second percentage to the reduced price. Adding the two percentages gives a different result.
Can the price be zero?
A 100% discount reduces a positive price to zero. Check your own commercial and invoicing rules before issuing a fully discounted item.
Check what remains after your cost with the Profit Margin Calculator, calculate VAT separately with the VAT Calculator, or apply a line-item reduction in the Invoice Generator.