Calculate the true Truth-in-Lending Act (TILA) Annual Percentage Rate (APR) by accounting for upfront lender fees.
Lean FIRE Calculator – Minimalist Early Retirement Target
Calculate your minimalist financial independence target based on essential, low-cost baseline living expenses.
Kelly Criterion Calculator – Optimal Trade Sizing & Risk Management
Calculate mathematically optimal position size and portfolio capital allocation using the Kelly Criterion.
Internal Rate of Return Calculator (IRR) — Newton-Raphson Solver
Compute the Internal Rate of Return for capital budgeting and project cash flows.
Invoice Generator — Create Professional Invoices Online Free
Create professional invoices instantly. Add line items, tax, discounts, and your business details. Download as printable HTML. Free online invoice maker.
Investment Return Calculator — ROI, Total Gain & Annualized Yield
Calculate total and annualized ROI, capital appreciation, and dividend yields.
Investment Growth Calculator — Compound Wealth Projection
Simulate long-term investment compounding with regular monthly additions.
Investment CAGR Comparison Calculator – Compare Compound Annual Growth – Free Online Tool
Compare compound growth rates and wealth divergence across up to three investment options.
Inflation Adjusted Return Calculator – Purchasing Power of Investments – Free Online Tool
Calculate real purchasing power of long-term investments and future real dollar portfolio value.
Inflation Calculator — Calculate Purchasing Power Over Time
Calculate cumulative inflation and see how much purchasing power changes over time based on an annual inflation rate.