By CalculatorInn Team · Updated: 2026-03-22 · Free & accurate · Instant results
Calculate how your savings grow with compound interest over time.
Interactive Compound Interest Calculator
JavaScript is required for the interactive calculator. Enable JavaScript to use this tool.
FV = P(1+r)^n + PMT × ((1+r)^n - 1) / r
P = initial principal, PMT = monthly contribution, r = monthly rate, n = total months.
Interest calculated on both the initial principal and the accumulated interest from previous periods.
This calculator compounds monthly, which is common for savings accounts and investments.
Fast, accurate calculators for finance, work, tech, and everyday math. Clear formulas and instant answers.
Browse 600+ free online calculators for finance, math, health, tech, business, education, salary, time, and unit conversions. Instant, accurate results with formulas and worked examples.