📈

Compound Interest

Project compound growth over N periods with optional regular contributions. See cumulative return and per-period value table.

📥 Inputs

Initial Principal

Return per Period (%) Can be negative.

Number of Periods

Period Unit

Add per Period (optional) Added at the END of each period, before next compound.

Final Value
—

Total Contributed

—

Total Profit

—

Total Return %
—

Formula
Without contribution: V_n = P × (1 + r/100)ⁿ
With contribution c: V_n = (V_n−1) × (1 + r/100) + c

#	Value	Period Gain	Cumulative Profit	Cumulative %