general

Calculates compound interest growth over time using the formula A = P(1 + r/n)^(nt). Given a principal, annual rate, duration in years, and compounding frequency, returns the future value, total interest earned, effective annual rate (APY), and a year-by-year growth schedule. Supports optional recurring monthly contributions for savings projections. Works for savings accounts, CDs, investment returns, and retirement planning. Currency-agnostic.

post/api/compound_interest

Request

  • Base URL: https://calc.engineer
  • URL: https://calc.engineer/api/compound_interest
  • Auth: none declared

Request body

principalnumber required

Initial investment or deposit amount (any currency unit).

annual_rate_pctnumber required

Annual interest rate as a percentage (e.g., 5.5 for 5.5%).

yearsnumber required

Investment duration in years. Max 100.

compounds_per_yearunknown required
monthly_contributionnumber

Optional recurring monthly contribution added at each month. Defaults to 0.

Response

Computed result for compound_interest

toolstring required
versionstring required
computed_atstring date-time required

Changes

No recorded changes to this operation across all 1 revision of this API.