Compound Interest Calculator Online Free

Compound interest is how small savings become big wealth. BotixTech's free compound interest calculator shows exactly how your money grows when interest earns interest - year after year.

Enter your starting amount, interest rate and time period. Our compound interest formula calculator breaks down your principal versus the interest earned.

How to Calculate Compound Interest

Enter the principal - your starting amount.
Set the interest rate - annual rate as a percentage.
Choose years and frequency - how long and how often interest compounds.
See the growth - total value and interest earned appear instantly.

Compound Interest Features

Flexible compounding - yearly, half-yearly, quarterly or monthly.
Clear breakdown - principal vs interest earned.
Live results - updates as you type.
Free - no signup.

Frequently Asked Questions

What is compound interest?

Compound interest means you earn interest on both your original money and the interest already earned. Over time, growth accelerates - that is why starting early matters so much.

What is the compound interest formula?

A = P(1 + r/n)^(nt), where P is principal, r is annual rate, n is compounding frequency per year, and t is years.

What is the difference between simple and compound interest?

Simple interest is calculated only on the principal. Compound interest is calculated on principal plus accumulated interest, so it grows faster.

How often should interest compound?

More frequent compounding gives slightly higher returns. Monthly compounding beats yearly at the same rate, though the difference is small.

Compound Interest Calculator