Percentage Calculator
Instant percentage calculations — X% of Y, change, ratio.
All percentage calculations: value, change, ratio, discount.
Calculation type
Enter two values to calculate.
How to use Percentage Calculator
- 1Select the calculation type (X% of Y, change, ratio, etc.).
- 2Enter the two values in the corresponding fields.
- 3The result appears instantly with the detailed formula.
Practical guide: Percentage Calculator
Why use this tool?
Percentage calculation appears in nearly every numeric decision: commercial discounts, salary increases, KPI changes, exam scores, bank interest. This tool covers the five most common modes — X% of Y, change between values, ratio, increase and decrease — with the detailed formula shown for each calculation.
Beware the confusion between percentage and percentage point: if an interest rate moves from 3% to 4%, that is +1 percentage point but a +33% relative change.
Privacy and limits
Calculations run locally in the browser. No entered value is stored or transmitted.
Percentage Calculator is designed to be free, fast and available without creating an account. It suits freelancers, students, marketing teams, developers and small businesses that need to handle a task efficiently.
Best practices
- For a discount, use the "Y decreased by X%" mode.
- To compare two revenue figures, use "Change from X to Y".
- The formula displays below the result for verification.
Related searches: percentage calculator, percent calculator, calculate percentage, percent of a number, percentage increase calculator.
Frequently asked questions
How do I calculate X% of a number?⌄
Multiply the number by X and divide by 100. For example, 20% of 250 = 250 × 20 / 100 = 50.
How do I calculate percentage change?⌄
Percentage change = ((final value − initial value) / |initial value|) × 100. A positive result means an increase; negative means a decrease.
How do I calculate a discount percentage?⌄
Discounted price = Original price × (1 − discount/100). For example, a 30% discount on $80: $80 × 0.70 = $56.
What is the difference between percentage and percentage point?⌄
A percentage point is an absolute difference between two percentages. If a rate goes from 10% to 12%, that is +2 percentage points, or a 20% relative increase.
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