Margin of Safety Calculator
The discount of price to intrinsic value — Graham's cushion against being wrong, plus the upside to fair value.
Formula
The margin of safety is value investing's central idea — the gap between price and conservative intrinsic value that protects you when your estimate is wrong (and it will be). Graham wanted ~33%; demand more for uncertain businesses, less for fortress franchises. It's humility quantified.
Not financial advice — for informational and analytical use only. Verify all figures with a qualified professional before acting on them.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Need margin of safety calculator results fast? Analysts, founders, traders and finance professionals use the Margin of Safety Calculator to skip the spreadsheet and get a defensible answer in one step — free, private and instant.
About Margin of Safety Calculator
The discount of price to intrinsic value — Graham's cushion against being wrong, plus the upside to fair value. The margin of safety is value investing's central idea — the gap between price and conservative intrinsic value that protects you when your estimate is wrong (and it will be). Graham wanted ~33%; demand more for uncertain businesses, less for fortress franchises. It's humility quantified. The governing relationship is MoS = 1 − price/intrinsic; buy below = intrinsic × (1 − required MoS). The Margin of Safety Calculator computes entirely in your browser — free, private (your figures never leave your device) and instant, recalculating live as you change any input.
How to use Margin of Safety Calculator
- 1Enter Estimated intrinsic value (currency), Current price (currency), Required margin of safety (%) into the Margin of Safety Calculator.
- 2The result is computed automatically using MoS = 1 − price/intrinsic; buy below = intrinsic × (1 − required MoS) — there is no button to press.
- 3Change any input to model a different scenario, then copy or share the result.
Why use Margin of Safety Calculator?
- ✓Computes margin of safety calculator instantly with the correct formula — no spreadsheet needed
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser, so the figures you enter stay private
- ✓Shows the formula, a live worked example and references so you can defend the number
Frequently asked questions
What is the formula behind the Margin of Safety Calculator?+
Margin of Safety Calculator uses MoS = 1 − price/intrinsic; buy below = intrinsic × (1 − required MoS). The margin of safety is value investing's central idea — the gap between price and conservative intrinsic value that protects you when your estimate is wrong (and it will be). The tool substitutes your actual inputs into this relationship and shows the worked example step by step.
What inputs does the Margin of Safety Calculator need?+
Enter Estimated intrinsic value (currency), Current price (currency), Required margin of safety (%) and the result updates immediately — there is no button to press. Change any value to model a different scenario in real time.
Is the Margin of Safety Calculator free, and is my data private?+
Yes — it is completely free with no sign-up or usage limit, and it runs entirely in your browser, so the numbers you enter are never uploaded or stored on any server. It is for informational and analytical use, not financial advice.
What should I watch out for when using the Margin of Safety Calculator?+
Graham wanted ~33%; demand more for uncertain businesses, less for fortress franchises. It's humility quantified.
What is the Margin of Safety Calculator based on?+
The method follows authoritative sources: Graham & Dodd — Security Analysis. The formula and references are shown on the page so you can verify and cite the result.
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