How to use the discount calculator
- Enter the original price and the discount percent.
- See the final price and your savings instantly.
The formula
Sale price = original × (1 − discount ÷ 100). Your savings is simply the original price minus the sale price.
Benefits
- Shows the final sale price and how much you save, instantly.
- Takes the guesswork out of "percent off" deals.
- Mobile-friendly for checking prices while you shop.
- Free, with no sign-up.
Limitations to know
- It focuses on a single discount at a time.
- It does not automatically add sales tax.
- Results are rounded to standard currency decimals.
Common mistakes to avoid
- Adding two percentages together — 20% off then an extra 10% off is not 30% off.
- Forgetting that tax is usually applied after the discount.
- Comparing a "percent off" deal against a "final price" deal without converting them to the same terms.
Alternatives
For general percentage math use the Percentage Calculator; to split a bill use the Tip Calculator; and for loan costs use the Loan Calculator.
Last updated: August 2026 · Reviewed by the AI Toolbox editorial team.
Frequently asked questions
Can I stack two discounts?
Apply them one after another — take the first discount, then apply the second to the new price (not added together).
Is it free?
Yes, completely free with no sign-up.