This tool is for informational use only. It is not financial advice – Auburn AI is not a registered financial advisor. Numbers here are estimates; consult a licensed Canadian financial advisor before any major money decision.
Compound Interest Calculator
Future value with compounding and monthly contributions.
How to use
Runs entirely in your browser. Live updates or click to run. No signup, no tracking, no data sent anywhere.
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Part of 71 free tools by Auburn AI. Category: Calculators
See where your money will actually be in 30 years
Get a 6-page Investment Strategy Forecast:
- Monte-Carlo-inspired projection with 3 portfolio risk profiles vs. your timeline
- Asset allocation breakdown (Canadian / US / Intl / Bonds / Alts) with rebalance triggers
- Tax-efficient account placement (which holdings in TFSA vs RRSP vs taxable)
- Sequence-of-returns risk + how to mitigate it 5-10 years before drawdown
Delivered in 10 minutes. $29 USD. 30-day refund if it does not pay for itself.
About this tool
The Compound Interest Calculator figures out how your money grows when interest is earned not just on your principal but on previously accumulated interest. Enter your starting amount, interest rate, compounding frequency, and time horizon, and it spits out your final balance along with a breakdown of how much is principal versus earned interest. It is built for anyone saving for retirement, planning an investment, or trying to understand how debt compounds over time.
Reach for this tool when you want a quick, honest picture of long-term growth without opening a spreadsheet. It is especially useful when comparing two savings accounts with different compounding schedules, or when you are trying to see how adding regular contributions changes your outcome over five, ten, or twenty years.
How to use it
- Enter your principal amount, the money you are starting with today.
- Input the annual interest rate as a percentage, for example 5 for five percent.
- Select how often interest compounds: daily, monthly, quarterly, or annually.
- Set the time period in years you want to project the growth over.
- Add any regular contributions if you plan to deposit money on a recurring schedule.
- Click Calculate to see your final balance, total interest earned, and a year-by-year table.
Pro tips
- Daily compounding versus annual compounding on the same rate produces a meaningfully different result over ten or more years; always compare both before choosing an account.
- Run the calculator twice with and without regular contributions to see exactly how much of your final balance comes from discipline versus returns.