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.
Dividend Income Planner: How Much Do You Need to Invest?
Type the income you want each month. See how much money you need invested to get it from dividends, how much to save each month to get there, and real companies with their yields.
4 min explainer
Is This Stock Undervalued? Free Stock Price Checker
Type a ticker. See our verdict on the company, then the growth today's price assumes next to how fast its sales really grew, in plain English.
6 min explainer
Free Portfolio Checkup: Is Your Stock Portfolio Healthy?
Type your stocks or upload a CSV from your broker. In seconds you see what stands out: warning signs, one stock or one industry that is too big, debt, and price.
5 min explainer
Is This Cheap Stock a Trap? Free Red Flag Scanner
Check its filings for five warning signs. Type a ticker and see the problems the company itself reported to the SEC, in its own words, with a link to the exact sentence.
6 min explainer
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