How compound interest is calculated
The calculator uses Maturity = Principal × (1 + Rate ÷ n)n × Time, where n is the number of compounding periods per year. Interest is maturity minus the starting principal.
Principal
A single starting amount; no later contributions or withdrawals are modelled.
Frequency
Choose 1, 2, 4, 12, or 365 compounding periods per year.
Time
Years, months, and days are combined into a duration measured in years.