Which investment calculator should I use?
- How much will my money grow? The compound interest calculator handles a starting amount plus monthly saving. The future value calculator does the same with yearly figures.
- How much do I need to save? Use the savings goal calculator for a target and a date, or the retirement calculator for a long-term plan that allows for inflation.
- How well did an investment do? The ROI calculator gives the total return and the CAGR calculator gives the smoothed yearly rate.
- What is a rate really worth? Convert a stated rate with the APY calculator, value a fixed-term deposit with the CD calculator, and check what prices do to it with the inflation calculator.
Why time matters more than timing
Growth compounds: each year's gains earn their own gains in the years that follow. That makes the number of years the strongest input in most of these tools. Try doubling the years in any growth calculator and compare it with doubling the monthly amount. The results are projections, not promises. Real returns move up and down from year to year, and past growth does not guarantee future growth.
Frequently asked questions
What rate of return should I enter?
Use a rate that fits the kind of asset and that you would be comfortable planning around. A lower, cautious rate gives a safer plan than an optimistic one. Run the calculator at two or three rates to see a range rather than a single figure.
What is the difference between ROI and CAGR?
ROI is the total gain as a share of what you put in, with no regard for time. CAGR turns that into a steady yearly rate, so you can compare investments held for different lengths of time.
Do these calculators include tax and fees?
No. They show growth before tax and fees, which differ by country, account and provider. To allow for them, lower the rate of return you enter by your estimated yearly cost.