Growth — Savings & Investment Growth Calculators
Focused on how money grows over time — compounding, contribution frequency, dividend reinvestment, and dollar cost averaging. Eight calculators covering every way a balance can grow, from a simple savings account to a full investment portfolio.
Compounding is the single biggest driver of long-term wealth, yet it's also the hardest concept to hold intuitively — small differences in rate or time horizon produce wildly different outcomes decades later. The Growth category exists to make those differences visible, with eight calculators covering the most common ways money accumulates.
The Compound Interest and Simple Interest calculators are the foundation. Compound Interest projects growth with adjustable contribution amounts, frequency, and compounding periods (daily, monthly, annually), so you can see exactly how reinvested interest accelerates a balance over time. Simple Interest strips compounding out entirely — useful for comparing against loans or short-term instruments that don't compound.
The Savings Goal calculator flips the problem around: instead of projecting forward from a starting balance, it works backward from a target amount and timeline to tell you exactly how much you need to contribute each month. Paired with the High Yield Savings calculator — which compares growth across different APY rates — these two tools are built for anyone comparing real bank offers rather than working off a single assumed rate.
The Rule of 72 calculator answers the fast mental-math question every investor asks: at this rate, how long until my money doubles? It's a quick sanity check rather than a precision tool, but a genuinely useful one for comparing investment options at a glance.
For portfolio-focused growth, the Dividend Reinvestment (DRIP) calculator projects how automatically reinvesting dividends compounds a stock or fund position over time, while the Dollar Cost Averaging calculator compares investing a lump sum all at once against spreading it across fixed periodic contributions — a common question for anyone deciding how to deploy a windfall or bonus.
Rounding out the category, the general-purpose Investment Calculator handles one-time or recurring investment growth projections for cases that don't fit neatly into the more specific tools above.