Investing & trading calculators that get the math right
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Options & strategies
Options Profit
Multi-leg P&L and payoff diagram for any options strategy.
Covered Call / CSP
Annualized return and yield on covered calls and cash-secured puts.
Implied Move
Expected move and breakevens implied by option prices.
Iron Condor
Max profit, loss and both breakevens for an iron condor.
Credit Spread
Return on risk and breakeven for a credit spread.
Wheel Strategy
Cash-secured put and covered-call yield for running the wheel.
Cash-Secured Put
Annualized yield, breakeven and assignment price on a CSP.
Dividends, growth & returns
Dividend / DRIP
Project dividend income with DRIP reinvestment over time.
Stock Return
Total return with dividends reinvested, plus annualized CAGR.
Compound Interest
Investment growth from regular contributions, compounded.
Dollar-Cost Averaging
Compare dollar-cost averaging against a lump-sum buy.
Crypto Profit
Profit and loss on a crypto trade, fees included.
Risk & position sizing
Margin
Leverage, buying power and your margin-call price.
Position Size
Share count from your risk-per-trade and stop distance.
Kelly Criterion
Optimal bet size from your edge and win rate.
Portfolio Rebalancing
Trades to bring holdings back to their target weights.
Sharpe / Drawdown
Risk-adjusted return and maximum drawdown.
Loss Recovery
The gain you need to break even after a loss (it's not symmetric).
Taxes
Learn
All guides →The wheel strategy, explained
Sell a cash-secured put, take assignment, then sell covered calls: how the wheel works, step by step.
Qualified vs ordinary dividends
Why qualified dividends are taxed at lower rates than ordinary ones, and how to tell which you hold.
What is a good Sharpe ratio?
What the Sharpe ratio measures, rough benchmarks for what counts as good, and why context matters.
Recovering from a stock loss
Why a 50% loss needs a 100% gain to break even, and what that asymmetry means for protecting capital.
What retail investors actually ask
We classified 10,997 Reddit posts and comments across five investing subreddits to find which calculations retail investors actually ask about.