Compound Interest Calculator
Project compound growth with flexible contributions, contribution timing, currencies, and a year-by-year breakdown
Project compound growth
Enter a plan, choose contribution timing, then review the projection
- Enter a planAdd principal, rate, and duration.
- Set contributionsChoose frequency and timing.
- Review growthCheck totals and yearly rows.
Investment inputs
Daily compounding uses 365 equal periods per year
Enter a growth plan, then calculate the projection.
Compound growth result
Calculate a valid plan to see the projection.
Understand the estimate
Each cash flow compounds for its remaining time. The projection assumes a constant nominal rate and does not include taxes, fees, or changing returns.
FAQs
How are regular contributions calculated?
Each contribution is added at the selected beginning or end of its period, then compounds for its remaining time.
What does contribution timing change?
Beginning contributions receive one additional contribution period of growth compared with otherwise identical end contributions.
Which compounding frequencies are available?
Choose daily, monthly, quarterly, half-yearly, or yearly compounding. Daily calculations use 365 equal periods per year.
Is the result a guaranteed return?
No. It is an estimate using a constant rate and regular contributions, without taxes, fees, or changing market returns.
How is currency handled?
Currency changes the displayed symbol only. The underlying calculation remains currency-neutral.