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Model compound interest, recurring monthly contributions, inflation-adjusted purchasing power, and target savings goals with private in-browser financial simulations.
Designed for long-term savers, passive index investors, and financial planning students.
Your investment portfolios, target goals, and net worth numbers are computed in local memory without cloud storage.
Models real purchasing power so you understand the true value of your future capital after inflation.
Download clean, printable wealth projection reports with year-by-year amortization schedules.
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Clear answers regarding compound interest, Rule of 72, inflation adjustments, and goal planning.
Compound interest is interest earned on both the initial principal deposit and all previously accumulated interest. Over long horizons, interest earnings dwarf regular contributions as the compounding curve steepens.
More frequent compounding produces slightly higher future balances because interest is credited and reinvested sooner. Monthly compounding generates more growth than annual compounding at the same nominal annual percentage rate.
Real Purchasing Power discounts your nominal future portfolio balance by the expected inflation rate (e.g. 2.5% per year), showing you what that future money will actually buy in today's terms.
Estimate monthly loan payments and interest amortization.
The Rule of 72 is a quick mathematical formula: divide 72 by your annual interest rate to find the approximate number of years it takes for your investment to double. For example, at 8% annual return, money doubles roughly every 9 years (72 / 8 = 9).
The goal planner reverse-calculates the exact monthly annuity deposit required to accumulate a specific future target balance based on your starting capital, horizon years, and expected rate of return.
Yes. Click 'Download PDF Report' to generate a clean, vector-rendered summary table with total future value, total interest earned, and year-by-year schedule data.
No. All compound growth simulations execute 100% locally in your browser memory. We never store or transmit your private financial information.
Yes. You can switch between USD, EUR, GBP, INR, CAD, AUD, JPY, and BRL at any time using the header currency selector.
Beginning-of-month contributions (annuity due) earn interest for an extra month compared to end-of-month contributions (ordinary annuity), resulting in slightly higher lifetime returns.
No. The Savings and Growth Toolkit is completely free and open for public educational and financial modeling use.