Finance calculators 🧮
Classic finance formulas without copying numbers around: pick a stock and the price, volatility, dividend or beta fill themselves in from the price history. Each one explained in plain words — no sign-up.
Black-Scholes
Pick a stock and price a European call and put with all the Greeks — the price, volatility, dividend and interest rate fill themselves in.
Option payoffs
Covered call, spreads, straddle, butterfly: pick a stock and a strategy and see the profit at expiry, the break-evens and the max gain and loss.
CAPM
Pick a stock: its beta against the home index, the risk-free rate and the index's return fill in, and CAPM gives the required return.
Markowitz
Pick as many stocks or ETFs as you like: their historical returns, volatilities and correlations fill in, and you see diversification at work on the efficient frontier.
Regular investing
What would a fixed monthly amount put into one stock or ETF be worth today? Pick a ticker, an amount and a start month.
Currency effect
How much of a foreign stock's return did you actually keep in your own currency — dollars, euros, pounds, francs or złoty? Pick a ticker, your currency and a start month: stock return vs the currency's move.
These are educational tools: they run a formula on the numbers you type. They are not a forecast or a recommendation, and they know nothing about your situation.