Three ways to calculate percentages. Pick a mode and get your answer instantly.
A percentage is a way of expressing a number as a fraction of 100. The word "percent" literally means "per hundred." The three most common percentage calculations are: finding what percentage one number is of another, finding a percentage of a number, and finding the whole when you know a part and a percentage.
This calculator solves all three types of percentage problems. Enter any two values and it instantly calculates the third. You can also calculate percentage change (how much a value increased or decreased as a percentage), percentage difference between two numbers, and add or subtract a percentage from a number. Each calculation type has its own section with clear labels.
Tips: A 20% tip on a $50 bill is $10. Calculate it as $50 x 0.20 = $10. The Tip Calculator handles this with bill splitting. Discounts: 30% off a $80 item saves $24, making the sale price $56. The Discount Calculator shows savings instantly. Tax: 8.25% sales tax on $100 adds $8.25. The Sales Tax Calculator handles state-specific rates. Grades: Scoring 42 out of 50 is 84%. The Grade Calculator handles weighted grades.
Percentage change measures how much a value has increased or decreased relative to its original value. The formula is: Percentage Change = ((New Value - Old Value) / Old Value) x 100. A positive result means an increase; a negative result means a decrease. For example, if a stock price goes from $50 to $65, the percentage change is ((65 - 50) / 50) x 100 = 30% increase.