Percentage Increase Calculator
Apply a percentage increase to an original number and return the updated value.
How to use Percentage Increase Calculator
1. Enter Original Value, Increase % in the stated order. 2. Follow nonzero denominator and whole-number requirements where they apply. Keep corresponding quantities on the same unit scale. 3. Select Calculate or press Enter to see increased value. 4. Copy result copies the output; Reset clears the inputs and answer.
Why use this tool?
Calculate a revised value from a known starting amount and increase rate.
How the calculation works
Result = original value × (1 + increase percentage ÷ 100). This is one increase, with no compounding over repeated periods. Numeric outputs use browser floating-point arithmetic, with six decimal places at most. Smaller nonzero outputs use six significant digits in scientific notation. Unrepresentable intermediate values or numeric outputs beyond the supported magnitude are rejected. Numeric input magnitudes, including each fraction or ratio component, must not exceed 9,007,199,254,740,991. Mathematical references: https://openstax.org/books/prealgebra-2e/pages/4-key-concepts and https://openstax.org/books/prealgebra-2e/pages/6-5-solve-proportions-and-their-applications.
Example
Original Value = 100 and Increase % = 20 give 120. Applying another 20% increase to 120 gives 144.
Practical tip
For several successive increases, apply each rate to the updated value. Adding rates is not generally equivalent.
Frequently asked questions
Does this compound an annual growth rate?
It applies the rate once. A multi-period growth forecast needs the number of periods and an appropriate compounding model.
Do signed inputs always have a practical interpretation?
These forms perform the stated arithmetic. Negative values, rates above 100% or a negative baseline can be mathematically valid while being unsuitable for a particular real-world quantity. Check the task and model before applying the result.
Does the tool choose units or round my input first?
Enter corresponding measurements in matching units; the maths forms do not convert units automatically. Exact fraction and ratio text is kept for integer arithmetic. Other numeric operations use browser floating-point values and the display precision stated above.