Money Tools

Max Drawdown Calculator

Estimate the percentage decline from a peak value to a trough value.

Updated April 16, 2026
Free online tool
Planning and research use

Why this page exists

Loss periods become easier to frame when the drop from a peak to a trough is turned into one percentage instead of being reviewed as two separate account values. This calculator helps visitors estimate max drawdown from peak value and trough value.

Interactive tool

Run the estimate

Enter your numbers and read the result first, then use the sections below to understand what affects the outcome.

Calculator

Max drawdown calculator

Estimate percentage drawdown from a peak value to a trough value.

Result

24.80%

Estimated drawdown based on the decline from a peak value down to a trough value.

Max drawdown24.80%

Peak value used$125,000.00

Trough value used$94,000.00

Dollar decline$31,000.00

$125,000.00 down to $94,000.00 leaves a decline of $31,000.00, which is about 24.80% of the peak value.
Drawdown is useful as a historical downside reference because it shows how deep the decline was from a prior high.
Use the result with risk and return tools if you want more context than a single peak-to-trough decline percentage.

This is a historical drawdown estimate, not a forecast. It does not tell you whether the same decline will happen again.

Planning note

Last updated April 16, 2026. Use this tool to compare scenarios and plan ahead, then confirm important details with the lender, employer, insurer, contractor, or other qualified provider involved in the final decision.

How it works

What the calculator is doing

Enter the peak value and the trough value.

The calculator subtracts the trough from the peak and compares that decline against the peak.

It shows max drawdown percentage, peak value, trough value, and the dollar decline.

Understanding your result

This is a historical drawdown estimate only. It helps describe how deep a decline was between two points, but it does not forecast future losses or recovery timing.

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Examples

Ways people use this tool

Example scenarios help turn a quick estimate into a more useful comparison or planning step.

Measure the size of a decline

A drawdown percentage can make the severity of a loss period easier to compare than dollar values alone.

Compare two strategies with different loss depth

Using the same approach for each strategy can show which one experienced the deeper peak-to-trough decline.

Use it with risk and return tools

Drawdown often makes more sense beside Sharpe, CAGR, and portfolio-allocation measures.

When to use it

Good times to run this calculator

Use this when you want a clean percentage view of how far an asset or portfolio fell from a high point to a low point.

It is especially useful when comparing loss severity across different accounts, strategies, or scenarios.

Assumptions and limitations

The estimate assumes the peak and trough values entered belong to the same asset or portfolio path.

It does not show how long the decline lasted, how long recovery took, or what happened between the two values.

Common mistakes

Avoid the usual input mistakes

Comparing drawdowns without also checking return and time period can create an incomplete picture of performance.

Using a non-peak starting value will understate the true depth of the decline.

Practical tips

Review drawdown beside return metrics so you can compare upside and downside together.

Use the same peak-to-trough method every time if you want fair comparisons across strategies or accounts.

Worked example

Walk through a realistic scenario

A worked example shows how the estimate behaves when the inputs resemble a real planning decision.

Estimate drawdown from a peak and trough

An account peaks at $125,000 and later falls to $92,000.

1. Enter $125,000 as the peak value.

2. Enter $92,000 as the trough value.

3. Subtract the trough from the peak and divide the decline by the peak to estimate the drawdown percentage.

Takeaway: The result gives a clean loss-depth measure that is easier to compare than the two account balances alone.

FAQ

Common questions

How is max drawdown calculated here?

The calculator subtracts trough value from peak value, then divides that decline by the peak to show the drawdown percentage.

Why show the dollar decline too?

Because the percentage gives a normalized view of the loss while the dollar decline shows the raw size of the drop.

Does this predict future risk?

No. It only describes the decline between the values entered and does not forecast what happens next.

Related tools

Keep comparing

Sharpe, real-return, and CAGR tools help show whether the drawdown profile matches the return profile you are comparing.

Budget and opportunity-cost tools can add practical context if the drawdown estimate is part of a broader planning decision.

Money ToolsUpdated April 12, 2026