The percentage calculations that come up most often while shopping. For the underlying math, see How to Calculate a Percentage.
| Scenario | How to Calculate |
|---|---|
| Discount amount | Price × (Discount % ÷ 100) |
| Price after discount | Price × (1 − Discount % ÷ 100) |
| Sales tax total | Price × (1 + Tax % ÷ 100) |
| Tip amount | Bill × (Tip % ÷ 100) |
The Percentage Calculator calculates discounts, tax, and tips instantly.
Percentage Calculator
Find 10% by moving the decimal point one place left, then double that number.
It depends on the store, but discounts are typically applied to the pre-tax price first, and tax is then calculated on the discounted amount.
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