freebirdcapital
Tool Fair valueUpdated 10/2026

Fair value calculator

Fair value, expected return and the highest price that still allows your target return — from earnings, growth and valuation.

What the calculator answers

Three questions that should precede every purchase: what would be a fair price? What return can be expected at today's price if the assumptions hold? And up to which price do I reach my target return? The logic follows the article The two keys to investment success. Pre-filled with its example company, valued at the rate-linked fair P/E.

Company

Valuation

My yardsticks

Earnings base (blended)
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Current P/E
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Fair value today
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Price vs. fair value
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Expected return p.a.
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Maximum price for target return
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Buy price with margin of safety
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Blended earnings: with each month after the fiscal year-end, the earnings base shifts pro rata from last year's earnings to the current-year estimate — keeping the P/E comparable across the year. At 0 months, only last year's earnings count. Expected return = internal rate of return from today's price, the dividend growing each year and the price at the end, if earnings grow as assumed and the market values the company at the fair P/E (before taxes). The maximum price is the present value of the same payments at the target return.

Rate-linked fair P/E: a stock has to earn more than the risk-free bond. The fair P/E is therefore the reciprocal of reference rate plus premium — at 5.0 % and 2.5 points that is 100 ÷ 7.5 = 13.3 — and at most 15. Above 15 % earnings growth the growth rate still applies. The “automatic” mode uses 15 without reference to rates, and the growth rate above 15 % growth. The premium is a matter of judgement: earnings grow with inflation, a coupon does not. Reference rate as in the Freebird Rating, as of mid-September 2026.

How sensitive is the result?

Expected return per year at the current price if growth and end valuation differ from the assumption.

Growth \ P/E at end
For comparison: Graham's rule of thumb intrinsic value ≈ EPS × (8.5 + 2 × growth) = –
original version without interest adjustment — only as a plausibility check

Background: Reading the price-to-earnings ratio properly · Method and rulebook. Runs entirely in your browser; no inputs are stored or transmitted.

This article is for information and education only. It is not investment advice and not a recommendation to buy or sell any security. Model calculations simplify deliberately; past performance is not a reliable indicator of future results.
David Krause
David Krause
Graduate industrial engineer (Dipl.-Wirtschaftsingenieur), 15+ years of costing, cost accounting and plant controlling in manufacturing. Here he asks the same questions from the outside: what does a company earn on its capital, and what may it cost?