Discount Calculator
Enter a price and a discount percentage to see the final price and how much you save — or work backwards from old and new prices.
- Free
- No sign-up
- Runs in your browser
All calculations happen in your browser.
How to use Discount Calculator
- Enter the original price and the discount percentage.
- The final price and the amount saved appear instantly.
- Use the second mode to find the discount percentage from old and new prices.
About this tool
Sales rarely come with the maths already done. This calculator shows the price after discount, the exact amount saved, and — when you only know the before and after prices — the effective discount rate.
When to use it: sale shopping and checking what a deal really saves.
Frequently asked questions
Does it support fixed-amount discounts?
Yes — the “fixed amount” mode subtracts a flat sum (like a £10 voucher) instead of a percentage.
How is the discount calculated?
Savings = price × percent ÷ 100, and the final price is the original minus the savings — the result appears as you type.
How do stacked discounts combine?
In sequence, not by adding: 20% off and then 10% off is 28% off overall, not 30%.
Does the price include tax?
The tool works on whatever number you enter. If your shelf price already includes tax, the result does too.
Any quick mental trick for sale racks?
Find 10% by moving the decimal point, halve it for 5%, and combine: 15% = 10% + 5%. Fast enough while shopping.
Can I work backwards from two prices?
Yes — the second mode computes the effective discount percentage from the old and new price.
Related tools
How to use Discount Calculator
Enter the required values into the Discount Calculator fields. The calculation updates as you adjust inputs. Use the result for planning, comparison, or documentation.
Practical benefits
- Complete tasks faster without installing additional software.
- Keep files private since processing happens in your browser.
- Produce consistent results that integrate into your workflow.
Frequently asked questions
Is this tool free to use?
Yes. Discount Calculator is fully free with no account or subscription required.
Does it upload my files?
No. All processing occurs locally within your browser session.
Can I use this for professional projects?
Yes, the tool is designed for both casual and professional use. Always verify critical outputs.