Percentage Increase Decrease Calculator
Calculate the percentage increase or decrease between two values instantly. Enter the original and new value to get the percent change, the direction, and the dollar amount, with the formula and a step-by-step explanation.
Percentage Change
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A positive number is an increase; a negative number is a decrease. The direction is shown alongside the percentage.
What is a percentage increase decrease calculator?
A percentage increase decrease calculator measures the percentage change between an original value and a new value, regardless of direction. It answers the question: by what percentage did the value change, and was it an increase or a decrease? It is the single tool to use when you do not know in advance whether the new value is higher or lower.
The formula is ((new − original) / original) × 100. When the new value is higher the result is positive (an increase); when it is lower the result is negative (a decrease). The percentage increase decrease calculator applies this automatically and reports the direction alongside the percentage and the absolute change.
Handling both directions in one tool matters because real data goes both ways. Prices fall, scores drop, and costs shrink just as often as they rise. A calculator that reports the signed change lets you analyze trends, volatility, and reversals without switching tools or re-entering values.
How to calculate a percentage increase or decrease
- 1
Enter the original value
Type the starting figure you are measuring the change from.
- 2
Enter the new value
Type the new figure, whether higher or lower than the original.
- 3
Read the percent change and direction
The calculator applies ((new − original) / original) × 100 and shows the percentage, the direction (increase or decrease), and the absolute change.
Why use this percentage increase decrease calculator?
Both directions in one tool
No need to pick an increase or decrease calculator — the signed result handles both automatically.
Instant and accurate
Get the exact percent change and direction the moment both values are entered.
Transparent formula
Every result is built on the standard change formula, so you can verify the math and reuse the method for any pair of values.
FAQ
Frequently Asked Questions
Quick answers to common questions about percentage calculations.
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