Investment Calculator

Calculate investment returns over time with compound growth.

How to Do It Manually

Investment returns are calculated using compound interest. Account for principal, regular contributions, return rate, and time to find final amount.

A = P(1 + r/n)^(nt) + [PMT × (((1 + r/n)^(nt) − 1) / (r/n))]
  1. Enter initial investment and monthly/annual contributions.
  2. Enter expected annual return percentage.
  3. Enter investment period (years).
  4. Calculate compound interest over time.

Frequently Asked Questions

What's the difference between simple and compound interest?

Simple: interest on principal only. Compound: interest on principal + accumulated interest (much better for long-term growth).

How does time affect investment growth?

Time is your biggest asset. Investing for 30 years beats 20 years due to compounding.