Compound Interest Calculator - Estimate Investment Growth
Project how savings or investments may grow with compounding, time, interest rate, and recurring contributions.
Interactive tool
This tool runs in your browser. Enable JavaScript to use the interactive features.
Quick Guide
The compound interest calculator estimates future value by applying compounding frequency and optional contributions over a selected period.
- Enter starting principal, interest rate, years, and compounding frequency.
- Add recurring contributions if part of your plan.
- Review future value, total contributions, and estimated interest.
Best for: Savings goals, investment planning, education funds, and long-term contribution comparisons.
What this tool does
The compound interest calculator estimates future value by applying compounding frequency and optional contributions over a selected period.
Important note: Investment returns are not guaranteed. Fees, taxes, inflation, and market changes can affect real outcomes.
Useful examples
- Compare monthly and yearly contribution plans.
- Estimate long-term savings growth at different rates.
- See how starting earlier changes the projected future value.
FAQs
What is compound interest?
Compound interest means interest earns additional interest over time because gains are added back into the balance.
Does compounding frequency matter?
Yes. More frequent compounding can slightly increase future value when the same annual rate is used.