Enter principal, rate, duration, and compound frequency, with an optional regular contribution, to calculate the ending balance and interest earned
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Calculate the ending balance and interest earned from principal, rate, duration and compounding frequency, with optional regular contributions to see long-term growth.
Annually, semi-annually, quarterly, monthly, and daily — changing the frequency changes the rate-per-period and number of periods, which affects the ending balance.
Yes, it defaults to 0 (no contribution). If you enter an amount, the tool calculates its future value (contributed at the end of each period) and adds it to the ending balance.
Handled correctly: the principal stays unchanged, and if there's a contribution, the ending balance is simply the principal plus the sum of all contributions — never a divide-by-zero error.
Results are estimates based on the values entered.
