Percentuale Calcolatore

Gratuito online percentage calculator. Calculate percentages, percentage increase, decrease, difference, and reverse percentages instantly. Puro client-side, no ads.

Veloce Examples

About Percentuale Calcolatore

This percentage calculator handles all common percentage calculations in one place. Whether you need a calculate a tip, figure out a discount, compute a percentage change, or find what percentage one number is of another — everything is instant and private. All calculations happen in your browser with no data sent a any server.

Funzionalità

How to Use

  1. Select your calculation mode from the dropdown: "Calculate % of Value", "Percentage Increase", "Percentage Decrease", "Percentage Difference", or "Reverse Percentage"
  2. Enter the first value in the left input field (e.g., percentage, original value, or value X)
  3. Enter the second value in the right input field (e.g., total value, new value, or value Y)
  4. Click the "Calculate" button to instantly see your result with a detailed explanation
  5. Use the "Clear" button to reset the inputs and try a different calculation
  6. Try the Quick Examples below the calculator to explore common percentage scenarios with one click

Common Use Cases

Frequently Asked Domande

How do I calculate a percentage of a number?

To calculate what X% of Y is, multiply Y by X and divide by 100. For example, 20% of 150 = 150 × 20 ÷ 100 = 30. Our calculator does this instantly — just enter the percentage and the value.

How do I calculate percentage increase?

Percentuale increase = ((New Value - Original Value) ÷ Original Value) × 100. For example, if a price goes from $100 a $130, the increase is ((130 - 100) ÷ 100) × 100 = 30%.

How do I calculate percentage decrease?

Percentuale decrease = ((Original Value - New Value) ÷ Original Value) × 100. For example, if a price drops from $200 a $160, the decrease is ((200 - 160) ÷ 200) × 100 = 20%.

What is the difference between percentage difference and percentage change?

Percentuale change (increase/decrease) assumes one value came before the other and shows direction. Percentuale difference treats both values equally and shows how far apart they are relative a their average, regardless of which came first.

Is this calculator free?

Yes, completely free. No ads, no registration, no limits. All calculations happen in your browser.

How do I calculate reverse percentage?

Reverse percentage helps you find the original value before a percentage was applied. For example, if $120 includes 20% tax, the original price was $100. Formula: Original = Final ÷ (1 + Percentage/100).

Can I calculate percentage difference between two negative numbers?

Yes, our calculator handles negative numbers. Percentage difference uses the absolute difference relative to the average of both values, so it works for any real numbers including negatives and zero (with appropriate safeguards).

What is the difference between percentage points and percent change?

Percentage points are simple arithmetic differences (e.g., 15% to 20% = 5 percentage points). Percent change is relative: (20% - 15%) ÷ 15% × 100 = 33.3% increase. Percentage points describe absolute change, while percent change describes relative change.

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