Sensitivity Calculator: Quantify Impact of Input Changes on Output

Calculate Your Sensitivity Analysis

The starting value of your independent variable (e.g., sales, interest rate).
The changed value of your independent variable.
The starting value of your dependent variable (e.g., profit, project NPV), corresponding to Initial Input.
The changed value of your dependent variable, corresponding to Final Input.
The Sensitivity Calculator helps you measure how much an output variable changes in response to a change in an input variable. This tool is crucial for financial analysis, project management, and scientific studies to understand variable relationships and the robustness of your models. Quickly assess the critical drivers impacting your results.

Formula:

Sensitivity (S) is a measure indicating how much an output value changes relative to a change in an input value. It's calculated using the ratio of percentage changes:

S = ( (Output2 - Output1) / Output1 ) / ( (Input2 - Input1) / Input1 )

Where:

  • Input1: The initial value of the independent variable.
  • Input2: The final (changed) value of the independent variable.
  • Output1: The initial value of the dependent variable, corresponding to Input1.
  • Output2: The final (changed) value of the dependent variable, corresponding to Input2.

This formula reveals the proportional responsiveness of the output to changes in the input.

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