How to use it
- Type the original price and the discount percentage, or tap one of the quick buttons (10%, 20%, 50%…).
- Optional: add an extra discount applied on top, and the sales tax rate.
- Read the final price and your savings. To find the % off from two prices, switch to “What % off is it?”.
Questions and answers
How do I calculate a discount?
Multiply the price by the discount percentage and divide by 100 to get the savings, then subtract: for 25% off $80, the savings are 80 × 25 ÷ 100 = $20 and you pay $60. In one step: 80 × (1 − 0.25) = 60.
Is 20% off plus an extra 10% the same as 30% off?
No. The second discount applies to the already reduced price: 100 → 80 → 72, which is 28% off in total, not 30%. The calculator shows this real total discount whenever you enter two.
Is sales tax applied before or after the discount?
For a store discount or a store coupon, tax is normally charged on the reduced price, and that is how this calculator does it. Rules for manufacturer coupons vary by US state, so the receipt may differ by a few cents.