Calculators · 100% Free
Compound Interest Calculator
Compound interest is how small savings become big fortunes. Enter your principal, rate and time to see exactly how your money grows — with a year-by-year breakdown.
How to Use the Compound Interest Calculator
1
Enter your starting principal amount.
2
Set the annual interest rate and the number of years.
3
Choose how often interest compounds: yearly, half-yearly, quarterly or monthly.
4
Click Calculate growth to see maturity value, total interest and the yearly table.
Why Use Our Compound Interest Calculator?
- Flexible compounding. Yearly, half-yearly, quarterly or monthly frequencies.
- Year-by-year table. Watch your balance and earned interest grow each year.
- Instant math. The standard compound-interest formula, computed locally.
- Free forever. No sign-up, no limits — plan as many scenarios as you like.
Compound Interest Calculator FAQs
With the formula A = P(1 + r/n)^(nt): principal times one plus the periodic rate, raised to the number of periods. The tool applies it for you instantly.
Simple interest pays only on the principal; compound interest pays on principal plus previously earned interest — so growth accelerates over time.
Yes. Monthly compounding earns slightly more than yearly at the same nominal rate, because interest starts earning interest sooner.
The Rule of 72: divide 72 by your annual rate to estimate doubling years. At 8%, money roughly doubles in 9 years.
No — this is a general educational estimate. For investment decisions, consult a qualified financial advisor.
No. All calculations happen in your browser; nothing is uploaded.
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