Free Retirement & Investment Calculators
Model 401(k) contributions, Roth conversions, dividend growth, stock option value, and crypto capital gains — with every formula hand-verified against reference values before it shipped.
401(k) Contribution Calculator
Project your 401(k) balance with employer match, contribution limits, and annual growth.
Roth IRA Conversion Calculator
Estimate the tax bill on converting a traditional IRA to a Roth IRA.
Dividend Growth Calculator
Project dividend income growth with reinvestment (DRIP) over time.
Structured Settlement Calculator
Present value of future structured settlement payments at a given discount rate.
Stock Option Pricing Calculator
Estimate call and put option value using the Black-Scholes model.
Crypto Capital Gains Calculator
Short-term vs long-term capital gains tax on cryptocurrency trades.
Accredited Investor Calculator
Check net worth and income against SEC accredited investor thresholds.
Expense Ratio Calculator
See how much an expense ratio costs you in fees over the life of an investment.
Verified against reference calculations
Every calculator in this category is checked against a known textbook or IRS reference figure before release — Black-Scholes pricing against the standard S=100, K=100 example, tax bracket math against the current-year IRS tables, and DRIP/expense-ratio compounding against hand-worked examples.
Tax figures are current for the stated year only
Tools that reference federal tax brackets (Roth conversion, crypto capital gains) are re-indexed annually by the IRS. Check the tool page for which tax year it currently uses before relying on the result for filing.