Discount Calculator
Calculate sale price, savings, and final cost after discount.
Last updated: June 13, 2026
Calculator
Results
25% off
How to Use This Calculator
- 1Enter the original price.
- 2Enter the discount percentage.
- 3Enter the sales tax rate (optional).
- 4View sale price, savings, tax, and final cost.
Formula Explanation
The discount is applied to the original price first, then sales tax is calculated on the discounted price.
Variables:
Worked Examples
$99.99 item at 25% off, 8% tax
- 1. Savings = $99.99 × 0.25 = $25.00
- 2. Sale price = $99.99 - $25.00 = $74.99
- 3. Tax = $74.99 × 0.08 = $6.00
- 4. Final = $74.99 + $6.00 = $80.99
$49.99 at 50% off, no tax
- 1. Savings = $49.99 × 0.50 = $25.00
- 2. Sale price = $24.99
Why Use This Calculator
- See exactly how much you save.
- Includes sales tax in final price.
- Great for shopping comparisons.
- Works with any discount percentage.
Tips & Best Practices
- Stack discounts multiply, not add: 20% off + 10% off = 28% total off, not 30%.
- Tax is calculated AFTER the discount in most states.
- Compare price per unit or ounce for the best deal, not just the percentage off.
Common Mistakes to Avoid
❌ Thinking a 50% off + 20% off coupon equals 70% off.
✅ Stacking discounts: $100 × 50% = $50, then $50 × 20% = $40. That is 60% off total, not 70%.
❌ Not including sales tax when comparing online vs in-store prices.
✅ Some online retailers charge no sales tax, making their effective price lower even with smaller discounts.
Frequently Asked Questions
How do I calculate the original price from a sale price?
Is tax calculated before or after the discount?
Embed This Calculator
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<iframe src="https://redicalc.com/embed/math/discount-calculator" width="100%" height="600" style="border:none;border-radius:12px;box-shadow:0 1px 3px rgba(0,0,0,0.1);" title="Discount Calculator — RediCalc.com" loading="lazy" allowtransparency="true"></iframe>Disclaimer: This calculator is provided for informational and educational purposes only. Results are estimates and should not be used as a substitute for professional advice. RediCalc.com makes no guarantees regarding the accuracy, completeness, or suitability of any calculations. Always consult a qualified professional before making financial, health, construction, or other important decisions.
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