About this calculator
Years to double money at a rate, or the rate needed for a horizon.
Annuity and differentiated monthly installments, interest breakdown, and amortization schedule.
Calculate PITI (Principal, Interest, Taxes, Insurance), PMI, and accelerated payoff savings.
Visualize compound growth with recurring deposits, annual rate, and investment horizons.
Add or extract Value Added Tax (VAT) with international country presets.
Analyze profitability and percentage return on business capital and investments.
Gross to net salary with income tax, social contributions and deductions, monthly and annual.
Years to double your money.
Input Parameters
Calculation Summary
Years to double money at a rate, or the rate needed for a horizon.
Years ≈ 72 ÷ rate percent.
Shown alongside via ln(2)/ln(1+r).
Most accurate around 6–10%.