Discount Calculator
Calculate sale prices, find discount percentages, and work out how much you save on any purchase.
About This Calculator
Discount Calculator is designed specifically for UK businesses and individuals. All calculations use current 2025/26 rates and follow HMRC guidelines.
Completely free with no signup required. Results are instant and calculated in your browser — no data is sent to our servers. For significant financial decisions, consult a qualified UK accountant or financial adviser.
How to use this calculator
- 1To find the sale price: enter the original price and the discount percentage. The calculator shows the amount saved and the final price after discount.
- 2To find the discount percentage: enter the original price and the sale price. The calculator works backwards to show what percentage discount was applied.
- 3For businesses, use this to plan sale pricing and check that discounted prices still cover your costs. Always calculate your margin on the discounted price, not the original price, to make sure you are not selling at a loss.
Use alongside
Pair this tool with our other free calculators: Profit Margin Calculator, UK VAT Calculator — Add or Remove VAT, Income Tax Calculator UK 2025/26 — Take Home Pay, Freelancer Day Rate Calculator.
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Frequently Asked Questions
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Last updated: 1 April 2026 · Rates for 2025/26 tax year