Worked example
Increasing 800 by 12.5% adds 100 and produces a final value of 900.
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Percentage change
Percentage Increase Calculator
Increase a starting value by a selected percentage and see the change amount and multiplier.
Enter your values
Result
Detailed breakdown
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Your result will appear here
Complete the fields and select Calculate to see a detailed answer.
Formula
How it is calculated
New Value = Original Value × (1 + Increase ÷ 100)
Frequently asked questions
How do I calculate a percentage increase?
Multiply the original value by the percentage rate to find the increase, then add it to the original value.
What is a multiplier?
A 15% increase has a multiplier of 1.15.
Can the increase exceed 100%?
Yes. A 150% increase produces a final value equal to 2.5 times the original.
Practical guidance
Use the Percentage Increase Calculator with confidence
Calculate an increase amount and final value. Review the example and limitations below before using the result for an important decision.
Assumptions and limits
The result follows the displayed mathematical operation and browser precision. Check units, signs, rounding, and the intended percentage base.
How to read the result
Calculations run from the values you enter using the formula described on this page. Inputs are processed in your browser and results are rounded for display.
Calculation methodology
Read our calculation methodology Educational estimate only. Verify regulated financial, tax, employment, or legal decisions with an official source or qualified professional.