Percentage Change Calculator - Calculate Increase or Decrease
Help
Calculate the percentage difference between two values to determine increases or decreases.
Practical Uses
- Stock Price Change: If a stock goes from $50 [Original] to $75 [New], what's the percentage change? 50% [Change%] increase
- Salary Change: A salary increase from $50,000 [Original] to $54,000 [New], what's the percentage raise? 8% [Change%]
- Weight Loss: Going from 180 [Original] lbs to 162 [New] lbs, what's the percentage change? 10% [Change%] decrease
- Revenue Growth: Revenue growing from $1,000,000 [Original] to $1,200,000 [New], what's the percentage growth? 20% [Change%]
- Performance Improvement: Improving a test score from 70 [Original] to 84 [New], what's the percentage improvement? 20% [Change%]
- Inflation Rate: A product price rising from $100 [Original] to $103 [New], what's the inflation rate? 3% [Change%]
- Traffic Change: Website visits declining from 10,000 [Original] to 8,500 [New], what's the percentage change? 15% [Change%] decrease
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 Memos" or press Enter to save your calculation.
How It Works
The Percentage Change calculator uses this formula:
For example, if a value increases from 50 to 75, the calculator computes:
This shows a 50% increase from the original value.
Need more percentage tools?
- Basic Percentage Calculator
For discounts or taxes. - Part-to-Whole Percentage
Find what % one number is of another. - Original Value Calculator
Reverse a percentage to the original amount. - Increased Value Calculator
Calculate value after percentage increase. - Decreased Value Calculator
Calculate value after percentage decrease. - Original Before Increase Calculator
Find original amount before percentage increase. - Original Before Decrease Calculator
Find original amount before percentage decrease. - Specialized Calculators (63+)
Practical everyday calculations for real-life scenarios.
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.
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Your calculation memos 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 memos 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.