Skip to content
ENExplore Calculators

Sensitivity Analysis Calculator

Work out sensitivity analysis instantly with clear inputs, formula shown and shareable results.

About Sensitivity Analysis Calculator

Sensitivity analysis measures how much the outcome moves for a given move in one input, holding everything else constant. The elasticity ranks which variables matter, and the break-even change — how far the variable can move before the outcome hits zero — tells you how much headroom the plan has.

Formulas

Elasticity

Elasticity = % change in outcome / % change in variable

Break-even change

Break-even % = -Base outcome / (Change in outcome per 1% move)

Worked example

With the default values below, Sensitivity Analysis Calculator returns Sensitivity (elasticity of outcome) of -3.000. Change any input above and every figure here is recalculated in your browser.

Inputs used

Base case outcome (NPV or profit)
1,200,000
Change applied to the input variable
10
Resulting outcome after the change
840,000
Base value of the input variable
5,000,000

Results

Sensitivity (elasticity of outcome)
-3.000
Change in outcome
-30.00%
Change that drives the outcome to zero
33.33%
Variable value at break-even
$6,666,666.67

Step by step

  1. 1Values used
  2. 2Elasticity
  3. 3Break-even change
  4. 4Sensitivity (elasticity of outcome)= -3.000
  5. 5Change in outcome= -30.00
  6. 6Change that drives the outcome to zero= 33.33
  7. 7Variable value at break-even= 6,666,666.67

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why hold everything else constant?

To isolate one driver. That is also the limitation: correlated variables move together in reality, which is what scenario analysis addresses.

What elasticity should worry me?

Anything above about 3 in absolute terms — the outcome amplifies input error threefold, so that variable deserves the best estimate you can obtain.

Related Calculators

Sensitivity Analysis Calculator | Calcrivo