Percentage Change Calculator - Calculate Increase or Decrease

Percentage Change
CALCULATOR

What is the percentage change from the Original value to the New value?

From
to
is a change of:
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Calculation history 0

    Help

    Calculate the percentage difference between two values to determine increases or decreases.

    How to Use

    • Enter the original (old) value in the first input field.
    • Enter the new value in the second input field.
    • Optionally, check the "Round" box to round the result to two decimal places.
    • The calculator will instantly show the percentage change.
    • A positive result indicates an increase; negative indicates a decrease.
    • Click "Add to History" or press Enter to save your calculation.

    How It Works

    The Percentage Change calculator uses this formula:

    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\%

    This shows a 50% increase from the original value.

    Practical Uses

    • Monitoring stock price changes over time.
    • Evaluating salary increases or decreases.
    • Tracking weight loss or gain percentages.
    • Analyzing business revenue growth year-over-year.
    • Assessing performance improvements in sports or academics.
    • Calculating inflation rates by comparing prices over time.
    • Measuring changes in website traffic or conversion rates.

    Need more percentage tools?

    Requirements and Important Information

    • No installation required – works directly in your browser.
    • Compatible with all modern browsers (Chrome, Firefox, Safari, Edge).
    • Calculations are performed locally – no data is sent to any server.
    • Your calculation history is stored only on your device.
      Each calculator stores up to 20 most recent calculations, automatically removing the oldest entries when this limit is reached.
    • Works offline after the initial page load.
    • Supports both desktop and mobile devices.
    • No account or login required.

    Helpful Calculator Features

    • Real-time calculations that update as you type.
    • Copy results to clipboard with a single click.
    • Calculation history that persists between sessions.
    • Option to round results for cleaner numbers.
    • Clear visual formulas to understand the math.
    • Mobile-friendly interface that works on all devices.
    • Dark mode support for comfortable viewing.
    • Keyboard shortcuts for faster calculations.

    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.