Percent Calculator
Percentages show up everywhere — discounts, tips, raises, tax, interest. This calculator answers the three basic questions: X% of Y, what percent of Y is X, and how much is left.
How to use this calculator
- Enter number.
- Enter percentage.
- Your results appear instantly below and update as you change the numbers.
How this calculator works
Multiply the number by the percentage and divide by 100. Worked example: 20% of $250 is $50, and $200 remains. To find what percent 50 is of 250, divide 50 by 250 and multiply by 100 — that is 20%.
Frequently asked questions
How do I calculate a percentage increase?
Subtract the old value from the new, divide by the old value, and multiply by 100. A raise from $50,000 to $54,000 is a $4,000 increase — 4,000 ÷ 50,000 × 100 = 8%.
How do I calculate a discount?
Multiply the price by the discount percent and subtract. A $120 jacket at 25% off saves $30, so you pay $90. Or multiply the price by (1 − 0.25) directly.
What is the difference between percentage and percentage points?
A rate rising from 5% to 6% is a 1 percentage point change but a 20% relative increase. Percentage points describe the absolute difference; percentage describes the relative change.
How do I find what percent A is of B?
Divide A by B and multiply by 100. If you answered 30 of 40 quiz questions, that is 30 ÷ 40 × 100 = 75%.
Disclaimer: Results are estimates for general information only and do not constitute financial, tax, or legal advice. Figures reflect 2026 rules and may change. Always confirm current limits and consult a qualified professional before making decisions. Official figures: IRS.gov · 2026 limits per IRS tax inflation adjustments.