Math calculator

Discount Calculator

See what you save and what you pay after a discount and tax.

Deterministic math. No account required.

Your details

Your results

Discount savings$30.00
Discounted price before tax$90.00
Sales tax$6.30

Percentage discounts apply successively, then the fixed coupon, floored at zero. Sales tax applies afterward, with shipping taxed only when selected. Monetary components round to cents. Verify store-specific rules.

Price after discount and tax$96.30
25% off the original price

How the discount calculator works

Calculate a sale price, discount savings, and the final price after an entered sales-tax rate.

Formula

Savings = original price × discount ÷ 100. Total = discounted price + tax on the discounted price, rounded to cents.

Example

A $120 item at 25% off saves $30. The discounted price is $90; with 7% tax, the total is $96.30.

What affects the result

  • The discount applies to the original price.
  • Tax is applied after the discount in this model.
  • Shipping and additional discounts are not included.

Frequently asked questions

Can I calculate a price without tax?

Yes. Enter a sales-tax rate of 0%.

Do two discounts simply add together?

Not usually. Sequential discounts multiply: 20% off followed by 10% off leaves 72% of the original price, a 28% combined discount. This tool models one discount.

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