Free calculators. No signup. No gating.
Honest investing tools built on real market data — dividend safety scores, intrinsic-value math, and the Buffett-style checks every other calculator skips. Each tool comes with a long-form explainer on the methodology so you can verify the math yourself.
Stock vs Stock Comparison Tool: Side-by-Side With a Real Verdict
Type two tickers, get a side-by-side comparison with the winner highlighted per metric, a normalised 5-year price chart, and a Buffett-style head-to-head verdict — not just a table of numbers.
5 min explainer
Margin of Safety Calculator: Buy-Zone Analysis With 5-Year Historical Fit
Graham's discipline made measurable. Enter intrinsic value, see the buy zone, plus the feature no other free MoS calculator shows: how often the stock was actually inside that buy zone over the past five years.
7 min explainer
Owner Earnings Calculator: Buffett's True-Cash-Earnings Formula (Three Ways)
Net Income plus Depreciation minus Maintenance Capex — the exact formula Buffett published in 1986. The hard part is estimating maintenance capex. This tool runs three honest approximations side by side.
7 min explainer
Free DCF Calculator: Intrinsic Value With SEC Data, Sensitivity Table, and Reverse DCF
The DCF calculator most retail investors get gated out of. Pulls live SEC EDGAR fundamentals, runs a two-stage DCF with a sensitivity heatmap, then asks the question that actually matters: what growth is the market pricing in?
9 min explainer
Stock Return Calculator: What $X in Any Stock N Years Ago Would Be Worth Today
Any US stock or ETF, any past date back to 1960. Dividends reinvested, SPY benchmark side-by-side, max drawdown shown honestly — so the headline gain isn't a fantasy you'd never have actually realised.
7 min explainer
Free Dividend Calculator: Safety Score, Yield-Trap Check, Total-Return Math
The dividend calculator most other sites don't build — primary-source data, a proprietary safety score, a yield-trap classifier, and honest after-tax total return. No signup, no gating, every US-listed stock and ETF.
8 min explainer