Free Percentage Increase Calculator
Use this online tool to calculate percentage increase (or decrease) between two numbers instantly.
Apply a Percentage Increase
Already know the percentage? Find the new amount after an increase.
What Is Percentage Increase?
Percentage increase shows how much a value has grown compared to where it started. It is one of the most useful math tools for everyday life: salary comparisons, business growth, inflation tracking, pricing decisions, investment performance, and analytics reporting.
If a number goes from 80 to 100, the increase is 20. But the percentage increase is more informative because it tells you growth relative to the original value.
Percentage Increase Formula
Use this standard formula:
The online percent change calculator above does this automatically and also reports absolute change and direction (increase or decrease).
How to Use This Online Calculator
- Enter the Original Value.
- Enter the New Value.
- Click Calculate % Change.
- Read the result showing amount changed and percentage increase/decrease.
For quick forecasting, use the second tool: enter a base amount and a percent to get the new value after increase.
Examples
1) Salary Raise
Salary increases from $48,000 to $52,800.
Increase = $4,800
Percentage increase = (4,800 / 48,000) × 100 = 10%
2) Product Price Increase
A product goes from $25 to $31.
Increase = $6
Percentage increase = (6 / 25) × 100 = 24%
3) Website Traffic Growth
Monthly visitors rise from 12,000 to 15,600.
Increase = 3,600 visitors
Percentage increase = (3,600 / 12,000) × 100 = 30%
Percentage Increase vs. Percentage Difference
These terms are often mixed up:
- Percentage increase compares a new value to an original starting value.
- Percentage difference compares two values relative to their average.
If you are tracking growth over time, you usually want percentage increase (also called a growth rate calculator or percentage gain calculator).
Common Mistakes to Avoid
- Using the new value in the denominator instead of the original value.
- Confusing absolute change (like +15) with relative change (like +12.5%).
- Rounding too early in multi-step calculations.
- Not handling a starting value of zero (division by zero is undefined).
Where This Calculator Helps
- Budgeting and personal finance
- Retail markup and price increase analysis
- Stock and crypto percentage gain checks
- Marketing and KPI growth reporting
- Academic and research data interpretation
Quick FAQ
Can this calculator show a decrease too?
Yes. If your new value is lower than the original, it reports a percentage decrease.
Can I use decimals?
Absolutely. The calculator accepts integers and decimal values.
Is this the same as a percent increase calculator for prices?
Yes. You can use it as a price increase calculator, growth percentage calculator, or percent change calculator.
Final Thoughts
A reliable percentage increase calculator online saves time and reduces errors. Whether you are checking income growth, price jumps, or performance trends, this tool gives instant and accurate results with clear, readable output.