Percentage Calculators - Help & Documentation

Learn how to use our percentage calculator tools efficiently with this comprehensive guide

Requirements and Important Information

  • JavaScript Support

    The Handy Percent application requires that JavaScript support is enabled in your web browser. Ensure JavaScript is active to use all functionalities smoothly.

  • Decimal Separators

    You may use the decimal separator suitable for your locale. For example:

    • In the United States and United Kingdom, use a dot (.), e.g., 10.5.
    • In many European countries, use a comma (,), e.g., 10,5.
  • Thousands Separator

    The thousands separator is ignored by the application when you type. You don't need to include it in your input. For instance, pasting 1,000 or 1.000 from the clipboard (depending on your locale settings) is treated simply as 1000.

  • Instant Calculations

    All calculations are performed instantly, in real-time, as you type your values. There's no need to press any button to see the results.

Helpful Calculator Features

Our calculators include several features to make your calculations faster and easier:

Easy Clipboard Integration

  • Quickly paste numbers from your clipboard with the automatic Paste button (Chrome only)
  • Instantly copy your results by clicking Add to History (copies to clipboard and saves to history)
  • Results are copied as plain numbers without additional text

Keyboard Shortcuts

  • Press Enter to move to the next field, copy the result to the clipboard, and save to history
  • Press Escape to clear all fields and start fresh
  • Use Space to move between input fields quickly

Calculation History

  • Calculations are automatically saved to your history
  • Click on any previous calculation to reload those values
  • Easily delete single items or clear the entire history
  • History is stored locally in your browser for future use

Customize Your Calculator

  • Drag and drop calculators to prioritize your most frequently used tools
  • Press and hold the mouse button on the calculator's icon, drag the calculator to your preferred position, then release the button
  • Your customized order is saved automatically

Mobile-Friendly Design

  • Our calculators are fully responsive and work seamlessly on any device
  • A mobile-friendly menu allows easy navigation between pages (Calculators, Help, and Privacy Policy)
  • Designed with touch-friendly buttons and inputs suitable for all screen sizes

Additional Features

  • Quickly toggle between light and dark modes
  • Visual mathematical formulas provided for clarity
  • Input validation ensures accurate and reliable results

Basic Percentage CALCULATOR

Calculate the percentage value of a given number:

  • Enter your main number into the "Number" field.
  • Enter the desired percentage into the "Percentage" field.
  • The calculated result is shown instantly.

How It Works

Uses the simple formula:

Result=Percentage100×Number\text{Result} = \frac{\text{Percentage}}{100} \times \text{Number}

For example, to find 15% of 200, the calculator computes:

15100×200=0.15×200=30\frac{15}{100} \times 200 = 0.15 \times 200 = 30

Practical Uses

  • Finding sale discounts (e.g., 20% off an $80 product).
  • Calculating taxes (e.g., 8% tax on a $250 item).
  • Checking grades (e.g., 85% of total points).
  • Measuring nutritional intake (e.g., 40% daily value).
Go to Basic Percentage CALCULATOR

Percentage Change CALCULATOR

Calculate the percentage difference between two values:

  • Input the original value.
  • Input the new value.
  • Instantly view percentage increase or decrease.

How It Works

The formula used:

Percentage Change=New Value−Old ValueOld Value×100%\text{Percentage Change} = \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \times 100\%

For example, if a value increases from 50 to 75, the calculator computes:

75−5050×100%=2550×100%=0.5×100%=50%\frac{75 - 50}{50} \times 100\% = \frac{25}{50} \times 100\% = 0.5 \times 100\% = 50\%

A positive result indicates an increase; negative indicates a decrease.

Practical Uses

  • Monitoring stock price changes.
  • Evaluating salary changes.
  • Tracking weight fluctuations.
  • Analyzing business revenue growth.
  • Assessing performance improvements.
Go to Percentage Change CALCULATOR

Percentage Of CALCULATOR

Find what percentage one number is of another:

  • Enter the first number (X) that you want to express as a percentage.
  • Enter the second number (Y) that you want to calculate the percentage against.
  • The calculator will instantly show what percentage X is of Y.

How It Works

Uses the formula:

Percentage=XY×100%\text{Percentage} = \frac{\text{X}}{\text{Y}} \times 100\%

For example, to find what percentage 25 is of 100, the calculator computes:

25100×100%=25%\frac{25}{100} \times 100\% = 25\%

Practical Uses

  • Calculating test scores (e.g., how many points you got out of the total).
  • Determining market share (e.g., a company's sales compared to total industry sales).
  • Analyzing budget allocations (e.g., how much of your budget goes to a specific expense).
  • Measuring progress toward goals (e.g., current savings compared to savings target).
Go to Percentage Of CALCULATOR

Tip CALCULATOR

Calculate tip amounts and total bills easily:

  • Enter the bill amount.
  • Select or input your preferred tip percentage.
  • Automatically see your calculated tip and total amount.

How It Works

Tip Amount:

Tip Amount=Bill Amount×Tip Percentage100\text{Tip Amount} = \text{Bill Amount} \times \frac{\text{Tip Percentage}}{100}

Total Amount:

Total Amount=Bill Amount+Tip Amount\text{Total Amount} = \text{Bill Amount} + \text{Tip Amount}

Example: For a $50 bill and 20% tip:

Tip = $50 × 0.20 = $10

$50×20100=$50×0.2=$10\$50 \times \frac{20}{100} = \$50 \times 0.2 = \$10

Total = $50 + $10 = $60

$50+$10=$60\$50 + \$10 = \$60

Practical Uses

  • Calculating tips at restaurants or deliveries.
  • Adjusting tips for different service levels.
  • Using while traveling internationally.
Go to Tip CALCULATOR

Tips for Accurate Calculations

  • Double-check input numbers for accuracy.
  • Use decimal points for precision.
  • Calculations update instantly as you type.
  • When the Round checkbox is checked, numbers are rounded to 2 decimal places.