Percentage Change Calculator - Calculate Increase or Decrease
Help
Calculate the percentage difference between two values to determine increases or decreases.
Practical Uses
- Inflation Rate:
A concert ticket rising from $100 [Original] to $103 [New] represents what inflation rate [Change%]?
3% - Performance Improvement:
Monthly sales leads improving from 70 [Original] to 84 [New] represents what percentage improvement [Change%]?
20% - Revenue Growth:
Small business revenue growing from $1,000,000 [Original] to $1,200,000 [New] represents what percentage growth [Change%]?
20% - Salary Change:
A Target manager's salary increase from $50,000 [Original] to $54,000 [New] represents what percentage raise [Change%]?
8% - Stock Price Change:
Netflix stock going from $50 [Original] to $75 [New] represents what percentage change [Change%]?
50% increase - Website Traffic Change:
A drop in Etsy shop visits from 10,000 [Original] to 8,500 [New] represents what percentage change [Change%]?
15% decrease - Weight Loss:
Weight dropping from 180 [Original] lbs to 162 [New] lbs on a Keto diet represents what percentage change [Change%]?
10% decrease
How to Use
- Enter the old value in the first box.
- Enter the new value in the second box.
- The calculator instantly shows the percentage difference.
- We'll tell you if it's an increase (positive) or decrease (negative).
- Press Enter or "Add to Memos" to save the result.
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
- Verify Inputs: A small typo can make a big difference.
- Use Decimals: For precision, always use decimal points (e.g., 10.5).
- Instant Updates: Results appear immediately—no waiting.
- Rounding: Check "Round" to tidy up your results to 2 decimal places.