Enter original price, discount, and tax rates.
Finance Math Calculator
Discount & Tax Calculator
Calculate discount savings, price after discount, tax on the discounted price, and final payable amount.
Instant answer
Formula breakdown
Browser-based
Mobile friendly
Interactive calculator
Enter your values
Use the example values or replace them with your own. Required validation happens before the calculation.
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Calculated answer
Result
Simple workflow
How to use the Discount & Tax Calculator
Follow these steps to get a reliable result and understand how it was produced.
Subtract the discount from the original price.
Apply tax to the discounted price and total the payable amount.
Understanding the calculation
The discount is subtracted first. Tax is then calculated on the discounted amount, matching the common retail sequence.
Discount = price×d/100; tax = discounted price×t/100The result panel substitutes your numbers into this relationship and shows the important intermediate values.
Common uses
- Sale-price checks
- GST or VAT estimates
- Retail budgeting
Accuracy tips
- Tax is calculated after discount in this model.
- Use zero for tax when none applies.
- Store policies may apply coupons, shipping, or tax in a different order.
Helpful answers
Discount & Tax Calculator FAQs
Important details about formulas, inputs, limitations, and result interpretation.
Is tax calculated before or after discount?
This calculator applies tax after subtracting the discount.
Can the discount exceed 100%?
A normal sale discount should not exceed 100%; values above that are not meaningful for a standard price.
Can I calculate only a discount?
Yes. Enter zero for tax.
Why might checkout totals differ?
Shipping, fees, product-level tax rules, coupon order, and rounding can change the final amount.