Updated July 2026

Saving & investing calculators

Watch money grow, keep score of the whole picture, and check what it's really worth once inflation has its say. These tools handle the compounding math so you can focus on the decisions. Everything runs privately in your browser.

Compound Interest

How deposits grow when interest earns interest.

Debt vs Invest

Pay off debt or invest the extra? See which wins.

Net Worth

Track and project net worth over time, by source.

Inflation

What a dollar from any year is worth today.

Let compounding do the heavy lifting

The single biggest lever in investing isn't picking winners — it's time. The compound interest calculator shows the moment your balance's own growth outpaces what you put in, and why starting a few years earlier can matter more than saving more each month. Feed it a realistic rate and it doubles as a savings-goal planner. And when spare cash could either grow in the market or wipe out a loan, the pay off debt vs invest calculator runs both on the same budget and shows which leaves you wealthier.

Keep score, and adjust for inflation

Growth only means something in today's money. The inflation calculator translates any past or future dollar into present-day buying power, and the net worth calculator tracks assets minus debts over time with the realistic ups and downs real portfolios have. Together they answer "am I actually getting ahead?" rather than just "is the number bigger?" When the goal is stopping work entirely, the retirement & FIRE tools pick up from here.