Solve math problems instantly. Calculate discounts, percent change, and find what percent one number is of another.
Percentages are everywhere in daily life—from shopping discounts and restaurant tips to bank interest rates and statistical analysis. Our Free Percentage Calculator is designed to help you solve these common math problems instantly without needing to memorize formulas.
(Percent ÷ 100) × Number
Example: 20% of 50 = (20/100) * 50 = 10
((New - Old) ÷ Old) × 100
Example: 10 to 15 is a 50% increase.
| Scenario | Calculator to Use |
|---|---|
| Shopping Sales | Use "Decrease Number" to calculate the final price after a 20% discount. |
| Tax Calculation | Use "Increase Number" to add sales tax (e.g., 8%) to a base price. |
| Grades/Scores | Use "What Percentage" to see what 45 out of 60 equals in percentage. |
From tips to taxes, get the numbers right.
Never guess the final price of a sale item again. Enter the original tag price and the discount percentage to see exactly how much you'll pay at the register.
Know the deal before you buy.
To calculate a 20% tip on a $50 bill, multiply 50 by 0.20 to get $10. The total would be $60. Our tool does this automatically in the "Tip Calculator" section.
Subtract the original value from the new value, divide that difference by the original value, and multiply by 100.