Calculator/Financial Calculator/ Compound Calculator

What is Compound Interest?

Compound Interest is a calculation method where interest is earned not only on the principal but also on previously accumulated interest. It has the characteristic of accelerating returns over time.

Compound Interest Formula

A = P × (1 + r)^t

  • A: Final Amount
  • P: Initial Investment
  • r: Interest Rate (decimal form, e.g.: 5% = 0.05)
  • t: Time Period (years)
Rule of 72

The Rule of 72 is a simple method to estimate how long it will take for an investment to double.

Years to Double Investment = 72 ÷ Annual Interest Rate (%)

Input Items


Enter at least 1,000 or more
0.1% ~ 50.0%
Maximum 100 years
Amount to invest regularly (optional)

Advanced Options

Calculation Result


Total Investment
0
Total Interest/Return
0
Final Amount
0
Annual Average Return
0%


Detailed Returns
Detailed Returns
Period Principal (USD) Valuation Amount (USD) Period Interest (USD) Accumulated Interest (USD) Cumulative Return Rate (%)

Investment Scenario Comparison