Compound Interest Calculator | Investment Growth & Savings Spreadsheet | Future Value Projection | Google Sheets, Excel
$13.00
Description
Compound Interest Calculator — How much of your future wealth is money you saved – and how much is interest compounding on top? This calculator shows you, year by year. Start with an amount, add to it each month, and watch it grow.
What’s inside your Compound Interest Calculator
Editable in Google Sheets and Microsoft Excel. Change the return, the years or your monthly amount and the whole projection updates.
What It Does
- Dashboard: your future value, how much you contributed versus how much you earned in interest, your money multiple, and a chart of the growth – the snowball made visible
- Inputs: starting amount, monthly contribution, expected annual return, years, compounding frequency, and an optional yearly increase to your contribution
- Growth: a year-by-year table of your starting balance, contributions, interest earned and ending balance
- How to Use: compound interest explained, the rule of 72, and why starting early beats starting big
Calculates
- Future value of your plan, compounded year by year
- Total contributed – every dollar you actually paid in
- Total interest earned – the compounding on top (cross-checked two ways)
- Money multiple – how many times your contributions you end with
The number that surprises people: put in $10,000 plus $500 a month at 7% for 30 years and you end with about $691,000 – but only $190,000 of that is money you paid in. The other ~$501,000 is interest compounding on interest. The chart shows the exact year the growth takes off.
A realistic touch: turn on the annual contribution increase to raise your monthly amount each year, the way most people save more as their income grows – it makes a real difference over decades.
Who it’s for
New investors, goal savers, FIRE planners, and parents who want to show compounding in real numbers.
Explore more in our Personal Finance Trackers collection, or open it in Google Sheets.
Frequently asked questions
How is it delivered?
Instant download in Google Sheets, Excel & PDF — available right after checkout, with lifetime access.
Is it ready to use?
Yes — the formulas are built in. Enter your own numbers and it calculates automatically.
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