Use this online tool to calculate the result from a percentage increase by any amount, or to increase a number by a percentage . See examples of how to use the formula and the calculator for salary, business, or investment scenarios. Use this free online tool to find the percentage increase or decrease of a number by a given percentage . You can also compute the percentage difference or change between two values, and learn the formulas and definitions of percentage concepts. Use our free percentage increase calculator to compute changes and differences easily. Visualize your results with dynamic graphs. Percentage Increase Calculator Percentage Increase Calculator allows you to find the percent (%) increase or decrease from an initial value to the final value.