Percentage Increase Calculator
Calculating a percentage increase or decrease is something most people need at some point — whether you are comparing prices, tracking business growth, analyzing salary changes, or checking how much a value has gone up or down. This free percentage increase calculator makes it instant and error-free.
How to use it: enter the original value in the first field and the new value in the second field. The calculator will show the exact percentage change, whether it is an increase or a decrease, along with the full formula so you can understand how the result was reached.
The formula used is: ((New Value – Original Value) / |Original Value|) × 100
A positive result means the value increased. A negative result means it decreased. The tool handles both cases automatically and shows the sign clearly.
Common uses include calculating a price increase between two periods, working out how much a salary has grown, comparing this year’s revenue against last year’s, tracking weight change over time, and checking discounts or markups in retail.
This calculator is free, instant, and requires no account or personal information.
FAQ
Q: What is the formula for percentage increase?
A: The formula is ((New Value – Original Value) / Original Value) × 100. If the result is positive, it is an increase. If negative, it is a decrease.
Q: Can this calculator handle percentage decreases too?
A: Yes. If the new value is lower than the original, the result will automatically show as a negative percentage, indicating a decrease.
Q: What if my original value is zero?
A: Percentage change cannot be calculated when the original value is zero, as it would require dividing by zero. The calculator will alert you in that case.
Q: Is the result rounded?
A: The result is shown to two decimal places for precision, but you can round it as needed for your use case.
Related tools: Compound Interest Calculator — Loan Repayment Calculator — Salary After Tax Calculator