Investing & Returns

Annuity Due Calculator (Payments at the Start of Each Period) - math and vectors complete, content pending.

Beta-Adjusted Return Calculator (Outperformance vs Alpha) - math and vectors complete, content pending.

Bond Ladder Calculator (Duration, Annual Maturities & Reinvestment Risk) - math and vectors complete, content pending.

Bond Modified Duration Calculator - math and vectors complete, content pending.

Accurate geometric CAGR engine with exact Fisher inflation discounting and capital doubling time analysis.

Callable Bond Yield Calculator (Yield to Call, Maturity & Worst) - math and vectors complete, content pending.

Compute exact Calmar Drawdown metrics with full schedules and charts.

CAPM Expected Return Calculator (Security Market Line) - math and vectors complete, content pending.

Project long-term compound wealth growth with regular contributions, APY conversion, and real purchasing power discounting.

Compute exact Cost of Equity metrics with full schedules and charts.

Compare realized crypto gain or loss under FIFO and HIFO cost-basis methods across multiple purchase lots.

Simulate dollar-cost-averaging into crypto with total invested, units accumulated, average cost basis, and ending value.

Project crypto staking reward growth with true effective annual yield and current IRS tax-timing guidance.

Compute exact Enterprise DCF metrics with full schedules and charts.

Compute exact Intrinsic DDM metrics with full schedules and charts.

Compute the dividend payout and retention ratios with sector-aware sustainability framing, from either aggregate or per-share figures.

Compute current dividend yield and yield on cost side by side to clarify a common source of investor confusion.

Efficient Frontier Calculator (Two-Asset Portfolio) - math and vectors complete, content pending.

Compute enterprise value, net debt, and the EV-to-market-cap ratio with exact arithmetic.

Calculate free cash flow yield on market capitalisation and on enterprise value, alongside earnings yield, cash conversion and the spread over the risk-free rate, so valuation can be compared directly with bond yields.

Gordon Growth Calculator (DCF Terminal Value) - math and vectors complete, content pending.

Compute the information ratio, average active return, and tracking error from a portfolio and benchmark return series.

Investment Calculator

Calculate the internal rate of return on a cash flow series alongside NPV at your own discount rate and MIRR at your actual reinvestment rate, with a warning where the series can produce multiple valid IRRs.

Compute exact Jensen Alpha metrics with full schedules and charts.

Calculate the Kelly optimal stake from a win probability and payoff ratio, with fractional Kelly scaling, showing that Kelly maximises compound growth rather than expected wealth.

Compute exact Relevered Beta metrics with full schedules and charts.

Compute the modified internal rate of return from a stated reinvestment rate and finance rate, reported beside the ordinary IRR and swept across reinvestment rates so the gap between the two measures is shown as the assumption it is.

Operating Leverage Calculator (Degree of Operating Leverage) - math and vectors complete, content pending.

Options Greeks Calculator (Position-Level Delta, Gamma, Theta, Vega) - math and vectors complete, content pending.

Compute a stock's P/E ratio from share price and EPS, plus the implied earnings yield and a relative valuation signal.

Compute a stock's PEG ratio, underlying P/E, and a plain-English valuation read.

Value a level, growing or deferred perpetuity, showing that value is always the payment divided by the rate, that halving the rate doubles the value, and how little of the total comes from beyond thirty years.

Score a company 0-9 across Piotroski's profitability, leverage, and efficiency tests.

Portfolio Correlation Calculator (Two-Asset Diversification) - math and vectors complete, content pending.

Compute exact allocation drift and buy/sell trade sizing across up to four asset classes to restore a target portfolio weighting.

Preferred Stock Valuation Calculator (Perpetuity Price & Yield) - math and vectors complete, content pending.

Price to Book Ratio Calculator (P/B vs ROE and Cost of Equity) - math and vectors complete, content pending.

Price to Sales Ratio Calculator (P/S and the Margin It Assumes) - math and vectors complete, content pending.

Residual Income Valuation Calculator (Book Value Plus Excess Returns) - math and vectors complete, content pending.

Risk Parity Calculator (Equal Risk Contribution) - math and vectors complete, content pending.

ROI Calculator

Rule of 40 Calculator (SaaS Growth Plus Margin) - math and vectors complete, content pending.

Compute exact Doubling Time metrics with full schedules and charts.

Compute exact Sharpe Index metrics with full schedules and charts.

Compute exact Sortino Index metrics with full schedules and charts.

Model wash-sale-aware tax-loss harvesting with bracket-based savings, gains/ordinary-income allocation, and carryforward tracking.

Chain-link subperiod returns for TWR and solve investor cash-flow IRR for DWR side by side, explaining the direction and cause of their divergence.

TIPS Real Yield Calculator (Breakeven Inflation & Indexed Principal) - math and vectors complete, content pending.

Compute exact Treynor Metric metrics with full schedules and charts.

Compute exact Two-Stage DDM metrics with full schedules and charts.

Calculate a company's weighted average cost of capital from its equity and debt weights, cost of equity, and after-tax cost of debt.

XIRR Calculator (Irregular Cash Flow Return) - math and vectors complete, content pending.

Yield Curve Spread Calculator (2s10s and 3m10y Inversion) - math and vectors complete, content pending.

Price a zero coupon bond from its yield and maturity, showing that its Macaulay duration equals maturity exactly and quantifying the resulting interest rate sensitivity.