Numbers, done right.
Free finance & statistics calculators + practical guides. 0 login, 0 tracking; ∞ calculations run locally in your browser.
15 free tools Runs entirely in your browser No sign-up
How is Maine feeling?
A short monthly survey on the economy, costs, health care, and politics in Maine. Twelve questions, about two minutes. Results publish live on the public dashboard.
Be the first to weigh in. Twelve questions, about two minutes.
How Maine Mood works
Answer 12 questions
Twelve questions on the economy, the state, and the people running it. Two minutes, anonymous, no sign-up.
How would you rate economic conditions in Maine today?
See live results
Results update as responses come in. Every chart shows the full sample, weighted to match Maine.
Illustrative preview. Live results are on the dashboard.
Compare month to month
Monthly waves stack up over time, so you can watch Maine's mood move instead of guessing from one poll.
Illustrative preview. Monthly waves stack up over time.
Everything you need to get the numbers right
Free statistical calculators, plain-English finance guides, and Excel templates with working formulas. One site, four sections, no sign-up.
Finance
Statistics for investors: position sizing, backtests, and reading earnings beyond the headlines.
Explore finance →Tools
Six free calculators that run in your browser: sample size, A/B tests, power, Kelly sizing, and options payoffs.
Open the tools →Templates
Excel workbooks and checklists with working formulas: free downloads and premium products.
Browse templates →Shop
Premium products with instant delivery: the automated stock valuation suite, and a statistics textbook in the works.
Visit the shop →Popular Tools
Swipe for more tools →
Latest guides
Why backtests lie
Overfitting and the multiple-comparisons problem: why the strategy that "worked" on historical data usually didn't.
The earnings beat is mostly noise
Why quarterly earnings surprises barely move long-run returns, and the two questions that separate signal from noise.
Position sizing without blowing up
Expected value, base rates, and the Kelly fraction: a disciplined framework for deciding how much to risk on any idea.
Daily 7
Seven stocks to watch today, updated every weekday morning: why they are moving, catalysts, risks, and options angles.
The Investor Stats Cheat Sheet
A free three-page PDF: breakeven win rates, stop-loss sizing, volatility drag, reverse valuation, and how to tell a real track record from noise. Plus new tools as they ship.
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